Income Taxes - Reconciliation of Income Tax Expense Using Statutory Federal Income Tax Rate Compared with Actual Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Effective income tax reconciliation                      
Tax at Statutory U.S. Rate of 34%                 $ (121,019) $ (38,001) $ (59,586)
Increase resulting from:                      
Nondeductible transaction costs                 9,274 1,756 0
Meals and entertainment                 173 173 197
Nondeductible lobbying expenses                 162 80 46
Disallowed compensation                 0 0 680
Other disallowed expenses                 3 4 36
Net permanent differences                 9,612 2,013 959
Valuation allowance                 123,875 132,050 63,721
Benefit from change in prior tax position                 0 (93,039) 0
State income taxes (benefit)                 (14,763) (3,740) (6,550)
Return to provision                 (694) 155 32
Income tax (benefit) provision $ (2,300) $ (600) $ 0 $ 0 $ (600) $ 0 $ 0 $ 0 $ (2,989) $ (562) $ (1,424)
Statutory U.S. Rate                 34.00% 34.00% 34.00%