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Commitments and Contingencies - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| 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 | ||