v2.4.1.9
Income Taxes - Summary of Income Tax Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current:      
Federal $ 15,742us-gaap_CurrentFederalTaxExpenseBenefit $ 17,011us-gaap_CurrentFederalTaxExpenseBenefit $ 14,609us-gaap_CurrentFederalTaxExpenseBenefit
State 943us-gaap_CurrentStateAndLocalTaxExpenseBenefit 1,347us-gaap_CurrentStateAndLocalTaxExpenseBenefit 1,041us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Deferred 2,349us-gaap_DeferredIncomeTaxExpenseBenefit 5,415us-gaap_DeferredIncomeTaxExpenseBenefit (6,085)us-gaap_DeferredIncomeTaxExpenseBenefit
Total Income Tax Expense $ 19,034us-gaap_IncomeTaxExpenseBenefit $ 23,773us-gaap_IncomeTaxExpenseBenefit $ 9,565us-gaap_IncomeTaxExpenseBenefit