Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Provision for Income Taxes and Income before Provision for Income Taxes (Detail)

v3.3.1.900
Income Taxes - Components of Provision for Income Taxes and Income before Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Provision Benefit For Income Taxes [Line Items]      
Income tax expense at the federal statutory rate of 35% $ 39,679 $ 29,044 $ 7,679
State income tax expense, net of federal benefit 4,569 3,622 985
Effect of state tax rate change on deferred taxes 1,273    
Permanent differences related to compensation charges, net of federal benefit 81 163 3,445
Change in valuation allowance 583 442 86
Other 833 181 275
Provision for income taxes $ 47,018 $ 33,452 13,735
Tax-sharing agreement [Member]      
Provision Benefit For Income Taxes [Line Items]      
Differences due to tax-sharing agreement     $ 1,265