Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Noncash investing and financing
Cash paid for interest, net of interest capitalized	$ 60,073	$ 96,701	$ 76,701
Cash paid for reorganization items	24,038
Recognition of an asset retirement obligation	500	700	1,000
Accrued and payable capital expenditures	8,700	140,600	$ 90,300
Accrued debt issuance costs		$ 500
Revolving Credit Facility
Noncash investing and financing
Offset of proceeds from terminations	$ 70,800