Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Change in operating assets and liabilities:
accounts receivable - JIB and other	$ 13,475	$ (8,116)
Net cash provided by operating activities	113,017	105,409
Investment in property and equipment	(111,167)	(122,780)
Net cash used in investing activities	(111,167)	(122,780)
As Previously Reported
Change in operating assets and liabilities:
accounts receivable - JIB and other		(16,093)
Net cash provided by operating activities		97,432
Investment in property and equipment		(114,803)
Net cash used in investing activities		$ (114,803)