v3.10.0.1
Income Taxes - Reconciles of Income Tax Expense to the U.S. Federal Statutory Rate (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Tax Disclosure [Abstract]        
Statutory tax at 21% and 35%, respectively $ (2,372) $ (4,691) $ (4,274) $ (5,415)
State taxes, net of federal impact 112 154 274 195
Share-based compensation tax shortfall   22 70 312
Nondeductible compensation 36   93  
Other differences 2 6 5 9
Write-off of deferred tax assets       139,090
Income tax (benefit) provision $ (2,222) $ (4,509) $ (3,832) $ 134,191