Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments And Contingencies Disclosure [Abstract]
Rent payments under operating leases	$ 1,700,000	$ 1,600,000	$ 1,600,000
Unrecognized tax benefits ,penalties and interest expense	428,000	456,000
Liability associated with potential pre-acquisition sales	230,000
Total liability, estimated and recorded	$ 1,500,000