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Shareholders' Equity - Summary of Stock Option (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity [Abstract]      
Beginning balance of outstanding shares 1,244 1,174  
Granted, Shares 923 163  
Forfeitures, Shares (44) (52)  
Exercised, Shares (316) (41)  
Ending balance of outstanding, shares 1,807 1,244 1,174
Exercisable, Shares 557 614  
Beginning Balance of Outstanding Weighted Average Exercise Price $ 5.18 $ 4.74  
Granted, Weighted Average Exercise Price $ 12.72 $ 7.96  
Forfeitures, Weighted Average Exercise Price $ 9.83 $ 5.87  
Exercised, Weighted Average Exercise Price $ 4.41 $ 5.95  
Ending Balance of Outstanding Weighted Average Exercise Price $ 9.05 $ 5.18 $ 4.74
Exercisable, Weighted Average Exercise Price $ 5.76 $ 5.36  
Outstanding, Weighted Average Remaining Contractual Term 7 years 8 months 12 days 6 years 9 months 18 days 7 years 3 months 18 days
Exercisable, Weighted Average Remaining Contractual Term 5 years 2 months 12 days 5 years 10 months 24 days  
Outstanding, Aggregate Intrinsic Value $ 6,198     
Outstanding, Aggregate Intrinsic Value 12,830 6,198   
Exercisable, Aggregate Intrinsic Value $ 5,786 $ 3,086