Consolidated Balance Sheets (Audited) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 193,243	$ 2,457
Restricted cash	2,214	3,942
Accounts receivable, net	94,085	64,880
Accounts receivable affiliates	6,614	4,842
Fair value of derivatives	2,572	52,042
Deferred income taxes	22,374	36,151
Prepaid expenses and other current assets	4,711	7,635
Total current assets	325,813	171,949
Properties and equipment, net	1,653,445	1,616,706
Assets held for sale	2,785	0
Fair value of derivatives	5,601	6,883
Other assets	37,559	31,310
Total Assets	2,025,203	1,826,848
Current liabilities:
Accounts payable	109,555	82,716
Accounts payable affiliates	41	5,296
Production tax liability	23,421	25,899
Fair value of derivatives	15,515	18,439
Funds held for distribution	32,578	34,228
Accrued interest payable	9,251	11,056
Other accrued expenses	23,059	25,715
Total current liabilities	213,420	203,349
Long-term debt	656,990	676,579
Deferred income taxes	118,767	148,427
Asset retirement obligations	37,811	61,563
Fair value of derivatives	3,015	10,137
Liabilities held for sale	2,061	0
Other liabilities	25,545	23,612
Total liabilities	1,057,609	1,123,667
Shareholders' Equity:
Preferred shares - par value $0.01 per share, 50,000,000 shares authorized,none issued	0	0
Common shares - par value $0.01 per share, 100,000,000 authorized, 35,675,656 and 30,294,224 issued as of December 31, 2013 and 2012, respectively	357	303
Additional paid-in capital	674,211	387,494
Retained earnings	293,267	315,568
Treasury shares - at cost, 5,508 and 5,059 as of December 31, 2013 and 2012, respectively	(241)	(184)
Total shareholders' equity	967,594	703,181
Total Liabilities and Shareholders' Equity	$ 2,025,203	$ 1,826,848