Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 202,291	$ 244,100
Accounts receivable, net	135,203	143,392
Fair value of derivatives	52,105	8,791
Prepaid expenses and other current assets	6,619	3,542
Total current assets	396,218	399,825
Properties and equipment, net	4,165,572	4,008,266
Fair value of derivatives	16,397	2,386
Goodwill	56,331	62,041
Other assets	22,410	13,324
Total Assets	4,656,928	4,485,842
Current liabilities:
Accounts payable	152,492	66,322
Production tax liability	35,296	24,767
Fair value of derivatives	10,138	53,595
Funds held for distribution	86,846	71,339
Accrued interest payable	15,955	15,930
Other accrued expenses	29,939	38,625
Total current liabilities	330,666	270,578
Long-term debt	1,049,004	1,043,954
Deferred income tax	452,028	400,867
Asset retirement obligation	77,867	82,612
Fair value of derivatives	2,311	27,595
Other liabilities	30,610	37,482
Total liabilities	1,942,486	1,863,088
Commitments and contingent liabilities
Stockholders' Equity:
Common shares - par value $0.01 per share, 150,000,000 authorized, 65,797,748 and 65,704,568 issued as of March 31, 2017 and December 31, 2016, respectively	659	657
Additional paid-in capital	2,495,940	2,489,557
Retained earnings	221,604	134,208
Treasury shares - at cost, 34,433 and 28,763 as of March 31, 2017 and December 31, 2016, respectively	(3,761)	(1,668)
Total stockholders' equity	2,714,442	2,622,754
Total Liabilities and Stockholders' Equity	$ 4,656,928	$ 4,485,842