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Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of stock options vested, shares 0 0
Recognized compensation expenses $ 5 $ 4
Unrecognized compensation expenses related to nonvested stock options 1 20
Number of stock options granted 0 0
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Recognized compensation expenses 2,080 385
Recognition of remaining compensation expense over a weighted-average period 27 months 12 days  
Deferred tax benefits recognized 878 170
Number of stock granted 98,720 0
Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option contractual term 10 years  
Incentive Plan [Member] | Stock Options [Member] | Maximum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options maximum vesting period 5 years  
Omnibus Incentive Plan New Plan 2012 [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Common shares available for grant 4,246,135  
Combined 2007 Plan and 2012 Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total unrecognized compensation expense, Nonvested restricted stock arrangements granted $ 16,440 $ 2,401