Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating loss carryforward	$ 20,442	$ 77,508
Organizational expenses	52	57
Stock based compensation	2,593	2,431
Intangibles	682	776
Other	3,812	1,419
Deferred Tax Asset	27,581	82,191
Deferred tax liabilities:
Oil and gas properties and other property and equipment, principally due to intangible drilling costs	(66,772)	(86,790)
Unrealized hedging loss (gain)	1,371	(11,414)
Other	(200)
Net deferred tax liabilities	$ (38,020)	$ (16,013)