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Employee Benefit Plans - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]      
Maximum employee contribution to defined contribution benefit plans 75.00%    
Employer matching contribution to employee contribution percentage 50.00% 50.00% 100.00%
Maximum employee contribution percentage of eligible compensation 6.00% 6.00% 6.00%
Defined contribution plan employee vesting percentage 100.00%    
Defined contribution plan employer vesting percentage 50.00%    
Number of years of service required to vest in full 2 years    
Employer contribution towards compensation plan $ 1,589 $ 2,156 $ 5,061