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Income Taxes - Schedule of Gross Unrecognized Tax Benefits (Excluding Interest and Penalties) (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Beginning Balance $ 1,189 $ 610
Additions for current year tax positions 183 793
Decreases for prior year tax positions (12) (106)
Settlements of prior year tax positions (560)   
Expiration of statutes (77) (108)
Ending Balance $ 723 $ 1,189