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Equity Investments (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
acre
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Jun. 30, 2013
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Dec. 31, 2013
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Jun. 30, 2014
Tatex Thailand II, LLC [Member]
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Jun. 30, 2013
Tatex Thailand II, LLC [Member]
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Jun. 30, 2014
Tatex Thailand II, LLC [Member]
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Jun. 30, 2013
Tatex Thailand II, LLC [Member]
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Dec. 31, 2013
Tatex Thailand II, LLC [Member]
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Jun. 30, 2014
Apico Llc [Member]
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Jun. 30, 2014
Tatex Thailand III, LLC [Member]
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Jun. 30, 2013
Tatex Thailand III, LLC [Member]
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Jun. 30, 2014
Tatex Thailand III, LLC [Member]
acre
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Jun. 30, 2013
Tatex Thailand III, LLC [Member]
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Dec. 31, 2013
Tatex Thailand III, LLC [Member]
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Jun. 30, 2014
Grizzly Oil Sands ULC [Member]
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Jun. 30, 2013
Grizzly Oil Sands ULC [Member]
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Jun. 30, 2014
Grizzly Oil Sands ULC [Member]
acre
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Jun. 30, 2013
Grizzly Oil Sands ULC [Member]
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Dec. 31, 2013
Grizzly Oil Sands ULC [Member]
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Jun. 30, 2014
Bison Drilling And Field Services LLC [Member]
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Jun. 30, 2013
Bison Drilling And Field Services LLC [Member]
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Jun. 30, 2014
Bison Drilling And Field Services LLC [Member]
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Jun. 30, 2013
Bison Drilling And Field Services LLC [Member]
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Dec. 31, 2013
Bison Drilling And Field Services LLC [Member]
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Jun. 30, 2014
Muskie Holdings LLC [Member]
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Jun. 30, 2013
Muskie Holdings LLC [Member]
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Jun. 30, 2014
Muskie Holdings LLC [Member]
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Jun. 30, 2013
Muskie Holdings LLC [Member]
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Dec. 31, 2013
Muskie Holdings LLC [Member]
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Jul. 01, 2013
Muskie Holdings LLC [Member]
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Jul. 01, 2013
Muskie Holdings LLC [Member]
Prime Rate [Member]
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Jun. 30, 2014
Timber Wolf Terminals LLC [Member]
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Jun. 30, 2013
Timber Wolf Terminals LLC [Member]
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Jun. 30, 2014
Timber Wolf Terminals LLC [Member]
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Jun. 30, 2013
Timber Wolf Terminals LLC [Member]
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Dec. 31, 2012
Timber Wolf Terminals LLC [Member]
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Dec. 31, 2013
Timber Wolf Terminals LLC [Member]
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Jun. 30, 2014
Windsor Midstream LLC [Member]
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Jun. 30, 2013
Windsor Midstream LLC [Member]
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Jun. 30, 2014
Windsor Midstream LLC [Member]
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Jun. 30, 2013
Windsor Midstream LLC [Member]
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Dec. 31, 2013
Windsor Midstream LLC [Member]
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Jun. 30, 2014
Windsor Midstream LLC [Member]
MidMar Gas LLC [Member]
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Jun. 30, 2014
Stingray Pressure Pumping LLC [Member]
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Jun. 30, 2013
Stingray Pressure Pumping LLC [Member]
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Jun. 30, 2014
Stingray Pressure Pumping LLC [Member]
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Jun. 30, 2013
Stingray Pressure Pumping LLC [Member]
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Dec. 31, 2013
Stingray Pressure Pumping LLC [Member]
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Jun. 30, 2014
Stingray Cementing LLC [Member]
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Jun. 30, 2013
Stingray Cementing LLC [Member]
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Jun. 30, 2014
Stingray Cementing LLC [Member]
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Jun. 30, 2013
Stingray Cementing LLC [Member]
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Dec. 31, 2013
Stingray Cementing LLC [Member]
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Jun. 30, 2014
Blackhawk Midstream LLC [Member]
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Jun. 30, 2013
Blackhawk Midstream LLC [Member]
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Jun. 30, 2014
Blackhawk Midstream LLC [Member]
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Jun. 30, 2013
Blackhawk Midstream LLC [Member]
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Dec. 31, 2013
Blackhawk Midstream LLC [Member]
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Jan. 28, 2014
Blackhawk Midstream LLC [Member]
Ohio Gathering Company, LLC and Ohio Condensate Company, LLC [Member]
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Jun. 30, 2014
Stingray Logistics LLC [Member]
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Jun. 30, 2013
Stingray Logistics LLC [Member]
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Jun. 30, 2014
Stingray Logistics LLC [Member]
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Jun. 30, 2013
Stingray Logistics LLC [Member]
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Dec. 31, 2013
Stingray Logistics LLC [Member]
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Jun. 30, 2014
Diamondback Energy, Inc [Member]
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Nov. 30, 2013
Diamondback Energy, Inc [Member]
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Jun. 30, 2013
Diamondback Energy, Inc [Member]
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Jun. 30, 2014
Diamondback Energy, Inc [Member]
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Jun. 30, 2013
Diamondback Energy, Inc [Member]
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Jun. 30, 2014
Diamondback Energy, Inc [Member]
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Nov. 30, 2013
Diamondback Energy, Inc [Member]
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Jun. 30, 2013
Diamondback Energy, Inc [Member]
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Dec. 31, 2013
Diamondback Energy, Inc [Member]
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Oct. 11, 2012
Diamondback Energy, Inc [Member]
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Jun. 30, 2014
Stingray Energy Services LLC [Member]
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Jun. 30, 2013
Stingray Energy Services LLC [Member]
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Jun. 30, 2014
Stingray Energy Services LLC [Member]
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Jun. 30, 2013
Stingray Energy Services LLC [Member]
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Dec. 31, 2013
Stingray Energy Services LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity shares owned by affiliate (shares) | 85,122 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total shares owned of subaffiliate (shares) | 1,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gas and oil area, reserve (acres) | 243,000 | 245,000 | 830,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distributions received | $ 0 | $ 901,000 | $ 84,800,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| (Income) loss from equity method investments | 69,569,000 | 50,108,000 | 198,044,000 | 111,318,000 | 0 | 205,000 | 0 | 205,000 | (121,000) | (75,000) | (170,000) | (93,000) | (2,228,000) | (731,000) | (4,229,000) | (1,263,000) | 329,000 | (171,000) | (1,604,000) | (23,000) | 101,000 | (375,000) | (433,000) | (816,000) | 0 | 0 | 0 | (8,000) | 35,000 | 474,000 | 203,000 | 858,000 | (1,630,000) | (319,000) | (2,143,000) | 384,000 | (106,000) | (47,000) | (201,000) | (69,000) | 0 | (83,000) | 84,787,000 | (122,000) | 238,000 | (28,000) | 157,000 | (54,000) | 72,945,000 | 51,361,000 | 121,712,000 | 112,457,000 | 6,000 | (103,000) | (35,000) | (138,000) | |||||||||||||||||||||||||
| Cash calls paid | 1,600,000 | 16,600,000 | 15,100,000 | 1,000,000 | 2,400,000 | 2,500,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Purchase price | 190,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Amount put in escrow | 14,300,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ownership interest | 23.50% | 23.50% | 17.90% | 17.90% | 24.9999% | 24.9999% | 40.00% | 40.00% | 25.00% | 25.00% | 50.00% | 50.00% | 22.50% | 22.50% | 28.40% | 50.00% | 50.00% | 50.00% | 50.00% | 50.00% | 50.00% | 50.00% | 50.00% | 4.70% | 4.70% | 4.70% | 50.00% | 50.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity investments | 501,436,000 | 501,436,000 | 440,068,000 | 12,238,000 | 12,238,000 | 10,774,000 | 203,351,000 | 203,351,000 | 191,473,000 | 25,777,000 | 25,777,000 | 12,318,000 | 8,111,000 | 8,111,000 | 7,544,000 | 1,001,000 | 1,001,000 | 1,001,000 | 13,230,000 | 13,230,000 | 10,632,000 | 17,769,000 | 17,769,000 | 19,624,000 | 2,842,000 | 2,842,000 | 3,291,000 | 0 | 0 | 0 | 1,060,000 | 1,060,000 | 903,000 | 211,300,000 | 211,300,000 | 211,300,000 | 178,708,000 | 138,500,000 | 4,757,000 | 4,757,000 | 3,800,000 | ||||||||||||||||||||||||||||||||||||||||
| Sale of Stock, Number of Shares Issued in Transaction | 1,000,000 | 2,300,000 | 2,234,536 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sale of Stock, Consideration Received on Transaction | 89,100,000 | 192,700,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Increase (decrease) due to foreign currency translation adjustment | 6,800,000 | (6,100,000) | (500,000) | (9,700,000) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loans receivable, basis spread on variable rate | 2.50% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan receivable | 900,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Payments for equity method investments | $ 39,162,000 | $ 21,960,000 | $ 1,000,000 | $ 2,900,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Investment (shares) | 2,379,500 | 2,379,500 | 2,379,500 | 7,914,036 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share price (usd per share) | $ 88.8 | $ 88.8 | $ 88.8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||