Annual report pursuant to section 13 and 15(d)

Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail)

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Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property Plant And Equipment Useful Life And Values [Abstract]      
Depreciation expense $ 423 $ 471 $ 492