Income Taxes - Components of the Net Deferred Tax Asset (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Total deferred tax assets $ 17,895 $ 15,169
Deferred tax liabilities:    
Total deferred tax liabilities (4,417) (5,459)
Net deferred tax asset 13,478 9,710
Federal [Member]
   
Deferred tax assets:    
Total deferred tax assets 13,945 11,816
Deferred tax liabilities:    
Total deferred tax liabilities (3,524) (4,372)
State [Member]
   
Deferred tax assets:    
Total deferred tax assets 3,950 3,353
Deferred tax liabilities:    
Total deferred tax liabilities $ (893) $ (1,087)