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Basis of Presentation and Significant Accounting Policies - Other Long Term Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Other Liabilities Disclosure [Abstract]    
Acquisition-related holdbacks $ 21,989 $ 22,500
Long-term portion of deferred rent liability 4,467 4,387
Liability for uncertain tax positions 1,664 916
Liability for unfavorable leasehold interests 4,162 233
Long-term portion of vacant rent liability 270 143
Other 111 45
Total Other Long-Term Liabilities $ 32,663 $ 28,224