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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 | 0 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | ||||||||||||||||||||||||||||||||
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Mar. 31, 2013
acre
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Mar. 31, 2012
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Dec. 31, 2012
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Mar. 31, 2013
Tatex Thailand II, LLC [Member]
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Dec. 31, 2012
Tatex Thailand II, LLC [Member]
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Mar. 31, 2013
Apico Llc [Member]
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Mar. 31, 2013
Tatex Thailand III, LLC [Member]
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Dec. 31, 2012
Tatex Thailand III, LLC [Member]
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Mar. 31, 2013
Grizzly Oil Sands ULC [Member]
acre
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Mar. 31, 2012
Grizzly Oil Sands ULC [Member]
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Dec. 31, 2012
Grizzly Oil Sands ULC [Member]
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May 15, 2012
Bison Drilling And Field Services LLC [Member]
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Apr. 30, 2012
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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Sep. 30, 2012
Bison Drilling And Field Services LLC [Member]
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Dec. 31, 2012
Bison Drilling And Field Services LLC [Member]
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Sep. 30, 2011
Bison Drilling And Field Services LLC [Member]
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May 15, 2012
Bison Drilling And Field Services LLC [Member]
Minimum [Member]
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May 15, 2012
Bison Drilling And Field Services LLC [Member]
Maximum [Member]
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Mar. 31, 2013
Muskie Holdings LLC [Member]
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Dec. 31, 2012
Muskie Holdings LLC [Member]
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Dec. 31, 2011
Muskie Holdings LLC [Member]
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Mar. 31, 2012
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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Mar. 31, 2013
Windsor Midstream LLC [Member]
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Mar. 31, 2012
Windsor Midstream LLC [Member]
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Dec. 31, 2012
Windsor Midstream LLC [Member]
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Mar. 31, 2013
Windsor Midstream LLC [Member]
MidMar Gas LLC [Member]
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Mar. 31, 2013
Stingray Pressure Pumping LLC [Member]
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Dec. 31, 2012
Stingray Pressure Pumping LLC [Member]
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Jun. 30, 2012
Stingray Pressure Pumping LLC [Member]
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Mar. 31, 2013
Stingray Cementing LLC [Member]
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Dec. 31, 2012
Stingray Cementing LLC [Member]
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Jun. 30, 2012
Stingray Cementing LLC [Member]
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Mar. 31, 2013
Blackhawk Midstream LLC [Member]
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Dec. 31, 2012
Blackhawk Midstream LLC [Member]
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Jun. 30, 2012
Blackhawk Midstream LLC [Member]
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Mar. 31, 2013
Stingray Logistics LLC [Member]
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Dec. 31, 2012
Stingray Logistics LLC [Member]
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Mar. 31, 2013
Diamondback Energy LLC [Member]
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Dec. 31, 2012
Diamondback Energy LLC [Member]
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Dec. 17, 2012
Diamondback Energy LLC [Member]
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Oct. 11, 2012
Diamondback Energy LLC [Member]
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Jun. 30, 2012
Diamondback Energy LLC [Member]
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Mar. 31, 2013
Stingray Energy Services LLC [Member]
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Dec. 31, 2012
Stingray Energy Services LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||
| Ownership interest | 23.50% | 17.90% | 24.9999% | 40.00% | 25.00% | 25.00% | 50.00% | 22.50% | 28.40% | 50.00% | 50.00% | 50.00% | 50.00% | 21.40% | 50.00% | ||||||||||||||||||||||||||||||||
| 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 | 800,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Distributions received | $ 188,000 | $ 200,000 | $ 200,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Equity method investment, percentage of remaining interest | 68.70% | ||||||||||||||||||||||||||||||||||||||||||||||
| Equity investments | 451,592,000 | 381,484,000 | 15,000 | 203,000 | 8,639,000 | 8,657,000 | 176,196,000 | 172,766,000 | 13,988,000 | 13,518,000 | 7,702,000 | 7,320,000 | 870,000 | 878,000 | 9,887,000 | 9,503,000 | 15,718,000 | 13,265,000 | 3,088,000 | 3,110,000 | 0 | 0 | 928,000 | 947,000 | 212,413,000 | 151,317,000 | 138,500,000 | 2,148,000 | 0 | ||||||||||||||||||
| (Income) loss from equity method investments | 61,210,000 | (268,000) | (500,000) | (300,000) | (100,000) | (400,000) | 400,000 | 100,000 | (700,000) | 61,100,000 | |||||||||||||||||||||||||||||||||||||
| Cash calls paid | 0 | 7,500,000 | 300,000 | 800,000 | 0 | 1,800,000 | 0 | ||||||||||||||||||||||||||||||||||||||||
| Increase (decrease) due to foreign currency translation adjustment | (3,600,000) | 900,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Loans receivable, description of variable rate basis | LIBOR | ||||||||||||||||||||||||||||||||||||||||||||||
| Loans receivable, basis spread on variable rate | 0.28% | 8.00% | |||||||||||||||||||||||||||||||||||||||||||||
| Payments for equity method investments | 12,653,000 | 75,879,000 | 6,200,000 | 1,000,000 | 7,000,000 | 2,200,000 | |||||||||||||||||||||||||||||||||||||||||
| Amount loaned during period | 1,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||
| Investment (shares) | 7,914,036 | ||||||||||||||||||||||||||||||||||||||||||||||
| Promissory note receivable | $ 63,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||
| Share price (usd per share) | $ 26.84 | ||||||||||||||||||||||||||||||||||||||||||||||