Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)

v3.6.0.2
Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax asset    
Federal net operating loss carryforward [1] $ 135,711 $ 107,935
Statutory depletion carryforward 8,843 8,843
Alternative minimum tax credit carryforward 104 208
Asset retirement obligations 1,181 630
Derivatives 6,456  
Unvested RSU equity awards 2,092 1,418
Other 4,376 6,823
Deferred tax asset before valuation allowance 158,763 125,857
Deferred tax liability    
Oil and natural gas properties 18,661 6,488
Derivatives   6,984
Other   3,542
Total deferred tax liability 18,661 17,014
Net deferred tax asset before valuation allowance 140,102 108,843
Less: Valuation allowance (140,192) $ (108,843)
Net deferred tax liabilities (90)  
Unrealized excess tax benefits related to stock based compensation $ 9,288  
[1] The Company's $135,711 deferred tax asset related to NOL carryforwards is net of $9,288 of unrealized excess tax benefits related to stock based compensation.