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Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Property and equipment      
Property and equipment, gross $ 58,211 $ 53,540  
Accumulated depreciation and amortization (26,873) (38,844)  
Property and equipment, net 31,338 14,696  
Depreciation expense, including amounts recorded in costs of services 5,500 5,000 $ 5,200
Computer, office equipment and software      
Property and equipment      
Property and equipment, gross 21,920 24,197  
Leasehold improvements      
Property and equipment      
Property and equipment, gross 29,361 21,613  
Furniture      
Property and equipment      
Property and equipment, gross $ 6,930 $ 7,730