Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Status of Options Related to Stock Plans (Detail)

v2.4.0.8
Employee Benefit Plans - Status of Options Related to Stock Plans (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding Beginning Balance 1,755    
Options Outstanding Exercised (173)    
Options Outstanding Forfeited (64)    
Options Outstanding Ending Balance 1,518 1,755  
Options Outstanding Exercisable 1,518    
Weighted Average Exercise Price Per Share, Beginning Balance $ 18.67    
Weighted Average Exercise Price Per Share, Exercised $ 14.15    
Weighted Average Exercise Price Per Share, Forfeited $ 27.00    
Weighted Average Exercise Price Per Share, Ending Balance $ 18.83 $ 18.67  
Weighted Average Exercise Price Per Share, Exercisable $ 18.83    
Weighted Average Remaining Contractual Term, Beginning balance 2 years 6 months 3 years 4 months 24 days  
Weighted Average Remaining Contractual Term, Exercisable 2 years 6 months    
Aggregate Intrinsic Value, Beginning Balance $ 8,372    
Aggregate Intrinsic Value, Ending Balance 9,831 8,372  
Aggregate Intrinsic Value, Exercisable 9,831    
Intrinsic Value of Options Exercised 1,657 7,427 4,039
Fair Value of Shares Vested   $ 426 $ 444
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise Price Per Share, Beginning Balance $ 1.81    
Exercise Price Per Share, Exercised $ 1.81    
Exercise Price Per Share, Forfeited $ 19.23    
Exercise Price Per Share, Ending Balance $ 1.81    
Exercise Price Per Share, Exercisable $ 1.81    
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise Price Per Share, Beginning Balance $ 30.07    
Exercise Price Per Share, Exercised $ 23.78    
Exercise Price Per Share, Forfeited $ 30.07    
Exercise Price Per Share, Ending Balance $ 30.07    
Exercise Price Per Share, Exercisable $ 30.07