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Deferred Rent and Other Long Term Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Other Liabilities Noncurrent [Line Items]    
Deferred rent liability $ 10,719 $ 11,354
Retirement benefit obligations 5,752 3,244
Contingent consideration related to F&F acquisition 4,640  
Derivative liability 454  
Total $ 21,565 $ 14,598