CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities
Net loss	$ (28,841)	$ (58,993)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depletion, depreciation and amortization	37,529	33,817
Deferred income taxes	22,133	(1,951)
Unsuccessful well costs	88	2,222
Change in fair value of derivatives	(38,177)	(2,377)
Cash settlements on derivatives, net (including $11.4 million and $56.6 million on commodity hedges during 2017 and 2016	11,153	56,901
Equity-based compensation	9,830	10,635
Other	621	14,969
Changes in assets and liabilities:
(Increase) decrease in receivables	(44,853)	39,894
(Increase) decrease in inventories	(10,044)	2,237
Decrease in prepaid expenses and other	352	13,674
Decrease in accounts payable	(2,905)	(58,501)
Increase (decrease) in accrued liabilities	12,732	(36,910)
Net cash provided by (used in) operating activities	(30,382)	15,617
Investing activities
Oil and gas assets	(31,810)	(226,571)
Other property	(271)	(47)
Proceeds on sale of assets	203,919
Net cash provided by (used in) investing activities	171,838	(226,618)
Financing activities
Borrowings under long-term debt		150,000
Payments on long-term debt	(150,000)
Purchase of treasury stock	(1,115)	(1,074)
Net cash provided by (used in) financing activities	(151,115)	148,926
Net decrease in cash, cash equivalents and restricted cash	(9,659)	(62,075)
Cash, cash equivalents and restricted cash at beginning of period	273,195	310,862
Cash, cash equivalents and restricted cash at end of period	263,536	248,787
Cash paid for:
Interest	20,559	14,611
Income taxes		2,734
Non-cash activity:
Conversion of joint interest billings receivable to long-term note receivable	4,042	$ 3,417
Contribution to equity method investment	$ 133,894