Basis of Presentation and Significant Accounting Policies - Other Long Term Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Other Liabilities Disclosure [Abstract]    
Holdback for resolution of certain indemnifiable matters $ 22,500   
Long term portion of deferred rent liability 4,387 2,292
Liability for uncertain tax positions 916 462
Acquisition lease liability 233 280
Long term portion of vacant rent liability 143 164
Other 45 187
Total Other Long Term Liabilities $ 28,224 $ 3,385