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Stockholders' Equity - Additional Information 2 (Detail) (2005 Contingent Stock Plan [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
2005 Contingent Stock Plan [Member]
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Liabilities related to cash awards $ 2.6
Weighted-average remaining contractual life of non-vested restricted stock shares 1 year 7 months 6 days
Weighted-average remaining contractual life of non-vested restricted stock units 1 year 8 months 12 days
Weighted-average remaining contractual life of non-vested cash awards 1 year 7 months 6 days