Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Deferred tax asset    
Federal net operating loss carryforward $ 97,437 $ 151,497
Interest expense carryforward 0 7,335
Statutory depletion carryforward 5,381 5,381
Alternative minimum tax credit carryforward 52 0
Asset retirement obligations 572 2,347
Derivatives asset 6,186 0
Unvested RSU equity awards 1,749 2,751
Other 2,401 991
Deferred tax asset before valuation allowance 113,778 170,302
Deferred tax liability    
Oil and natural gas properties 54,264 169,682
Derivatives liability 0 10,184
Total deferred tax liability 54,264 179,866
Net deferred tax asset (liability) before valuation allowance 59,514 (9,564)
Less: Valuation allowance (60,919) 0
Net deferred tax liability (1,405) $ (9,564)
Reduction i deferred tax assets $ 40,611