Annual report pursuant to Section 13 and 15(d)

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

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Income Taxes Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:      
Net operating loss carryforward $ 46,209 $ 1,091 $ 1,462
Oil and gas property basis difference 292,838 0 0
FASB ASC 718 compensation expense 1,922 1,562 634
AMT credit 23,629 24,053 7,968
Charitable contributions carryover 146 150 25
Unrealized loss on hedging activities 0 0 8,540
Foreign tax credit carryforwards 2,074 2,074 2,074
Accrued liabilities 0 1,260 0
ARO liability 9,415 0 0
State net operating loss carryover 4,344 2,627 4,408
Total deferred tax assets 380,577 32,817 25,111
Valuation allowance for deferred tax assets (281,782) (3,145) (4,743)
Deferred tax assets, net of valuation allowance 98,795 29,672 20,368
Deferred tax liabilities:      
Oil and gas property basis difference 0 183,767 72,173
Investment in pass through entities 7,430 38,315 8,799
Non-oil and gas property basis difference 715 849 249
Investment in nonconsolidated affiliates 0 0 46,495
Unrealized gain on hedging activities 66,422 37,006 0
Total deferred tax liabilities 74,567 259,937 127,716
Net deferred tax asset (liability)   $ (230,265) $ (107,348)
Net deferred tax asset (liability) $ 24,228