Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:      
Net operating loss carryforward $ 120,626 $ 162,073 $ 46,209
Oil and gas property basis difference 151,260 386,302 292,838
Investment in pass through entities 12,343 27,469 14,034
FASB ASC 718 compensation expense 813 2,084 1,922
Business energy investment tax credit 369 369 0
AMT credit 0 3,842 23,629
Charitable contributions carryover 255 303 146
Unrealized loss on hedging activities 0 48,317 0
Foreign tax credit carryforwards 2,074 2,074 2,074
Accrued liabilities 285 397 0
ARO liability 15,897 12,107 9,415
Non-oil and gas property basis difference 171 0 0
State net operating loss carryover 6,954 5,351 4,344
Total deferred tax assets 311,047 650,688 394,611
Valuation allowance for deferred tax assets (298,830) (645,841) (303,246)
Deferred tax assets, net of valuation allowance 12,217 4,847 91,365
Deferred tax liabilities:      
Non-oil and gas property basis difference 0 155 715
Unrealized gain on hedging activities 11,009 0 66,422
Total deferred tax liabilities 11,009 155 67,137
Net deferred tax asset $ 1,208 $ 4,692 $ 24,228