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Equity Investments (Narrative) (Details) (USD $)
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3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||
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Mar. 31, 2014
acre
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Mar. 31, 2013
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Dec. 31, 2013
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Mar. 31, 2014
Tatex Thailand II, LLC [Member]
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Mar. 31, 2013
Tatex Thailand II, LLC [Member]
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Dec. 31, 2013
Tatex Thailand II, LLC [Member]
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Mar. 31, 2014
Apico Llc [Member]
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Mar. 31, 2014
Tatex Thailand III, LLC [Member]
acre
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Mar. 31, 2013
Tatex Thailand III, LLC [Member]
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Dec. 31, 2013
Tatex Thailand III, LLC [Member]
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Mar. 31, 2014
Grizzly Oil Sands ULC [Member]
acre
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Mar. 31, 2013
Grizzly Oil Sands ULC [Member]
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Dec. 31, 2013
Grizzly Oil Sands ULC [Member]
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Mar. 31, 2014
Bison Drilling And Field Services LLC [Member]
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Mar. 31, 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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Mar. 31, 2014
Muskie Holdings LLC [Member]
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Mar. 31, 2013
Muskie Holdings LLC [Member]
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Dec. 31, 2013
Muskie Holdings LLC [Member]
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Jul. 02, 2013
Muskie Holdings LLC [Member]
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Jul. 02, 2013
Muskie Holdings LLC [Member]
Prime Rate [Member]
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Mar. 31, 2014
Timber Wolf Terminals LLC [Member]
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Mar. 31, 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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Mar. 31, 2014
Windsor Midstream LLC [Member]
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Mar. 31, 2013
Windsor Midstream LLC [Member]
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Dec. 31, 2013
Windsor Midstream LLC [Member]
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Mar. 31, 2014
Windsor Midstream LLC [Member]
MidMar Gas LLC [Member]
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Mar. 31, 2014
Stingray Pressure Pumping LLC [Member]
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Mar. 31, 2013
Stingray Pressure Pumping LLC [Member]
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Dec. 31, 2013
Stingray Pressure Pumping LLC [Member]
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Mar. 31, 2014
Stingray Cementing LLC [Member]
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Mar. 31, 2013
Stingray Cementing LLC [Member]
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Dec. 31, 2013
Stingray Cementing LLC [Member]
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Mar. 31, 2014
Blackhawk Midstream LLC [Member]
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Mar. 31, 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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Mar. 31, 2014
Stingray Logistics LLC [Member]
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Mar. 31, 2013
Stingray Logistics LLC [Member]
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Dec. 31, 2013
Stingray Logistics LLC [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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Mar. 31, 2014
Diamondback Energy, Inc [Member]
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Mar. 31, 2013
Diamondback Energy, Inc [Member]
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Nov. 30, 2013
Diamondback Energy, Inc [Member]
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Dec. 31, 2013
Diamondback Energy, Inc [Member]
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Dec. 17, 2012
Diamondback Energy, Inc [Member]
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May 07, 2012
Diamondback Energy, Inc [Member]
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Mar. 31, 2014
Stingray Energy Services LLC [Member]
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Mar. 31, 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 | $ 188,000 | $ 84,800,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| (Income) loss from equity method investments | 128,475,000 | 61,210,000 | 0 | 0 | (49,000) | (18,000) | (2,001,000) | (532,000) | (1,933,000) | 148,000 | (534,000) | (441,000) | 0 | (8,000) | 168,000 | 384,000 | (513,000) | 703,000 | (95,000) | (22,000) | 84,787,000 | (39,000) | (81,000) | (26,000) | 48,767,000 | 61,096,000 | (41,000) | (35,000) | |||||||||||||||||||||||||
| Cash calls paid | 8,100,000 | 12,200,000 | 1,000,000 | 2,400,000 | |||||||||||||||||||||||||||||||||||||||||||||||||
| Purchase price | 190,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Amount put in escrow | 14,300,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ownership interest | 23.50% | 17.90% | 25.00% | 40.00% | 25.00% | 50.00% | 22.50% | 28.40% | 50.00% | 50.00% | 50.00% | 50.00% | 6.70% | 50.00% | |||||||||||||||||||||||||||||||||||||||
| Equity investments | 499,419,000 | 440,068,000 | 10,725,000 | 10,774,000 | 190,263,000 | 191,473,000 | 22,608,000 | 12,318,000 | 8,011,000 | 7,544,000 | 1,001,000 | 1,001,000 | 13,195,000 | 10,632,000 | 18,872,000 | 19,624,000 | 3,067,000 | 3,291,000 | 0 | 0 | 821,000 | 903,000 | 227,474,000 | 178,708,000 | 138,500,000 | 3,382,000 | 3,800,000 | ||||||||||||||||||||||||||
| Sale of Stock, Number of Shares Issued in Transaction | 2,300,000 | 2,234,536 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Sale of Stock, Consideration Received on Transaction | 192,700,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Increase (decrease) due to foreign currency translation adjustment | (7,300,000) | (3,600,000) | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Loans receivable, basis spread on variable rate | 2.50% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Investment Income, Interest | 106,000 | 79,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan receivable | 900,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Payments for equity method investments | $ 23,687,000 | $ 12,653,000 | $ 1,000,000 | $ 2,900,000 | |||||||||||||||||||||||||||||||||||||||||||||||||
| Investment (shares) | 3,379,500 | 7,914,036 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Share price (usd per share) | $ 67.31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||