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Acquisitions - Additional Information (Detail)
 1 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 20, 2012
Fred & Friends
USD ($)
Dec. 31, 2013
Fred & Friends
USD ($)
Dec. 20, 2012
Fred & Friends
Contingent Payment
USD ($)
Dec. 20, 2012
Fred & Friends
Contractual Holdback
USD ($)
Dec. 20, 2012
Fred & Friends
Customer Relationships
USD ($)
Dec. 20, 2012
Fred & Friends
Trade Names
USD ($)
Nov. 04, 2011
Creative Tops
USD ($)
Nov. 04, 2011
Creative Tops
GBP (£)
Business Acquisition [Line Items]                      
Value of contingent consideration       $ 5,370,000   $ 4,000,000 $ 1,400,000        
Undiscounted deferred and contingent consideration, higher range         7,700,000            
Purchase price allocation, intangible assets       13,592,000              
Purchase price allocation, amortizable intangible assets               7,200,000 3,900,000    
Purchase price allocation, goodwill amount 5,085,000 5,085,000 2,673,000 2,500,000              
Percentage of equity interests acquired                   100.00% 100.00%
Amount of consideration paid                   23,700,000 14,800,000
Business acquisition cash paid, net of cash acquired       14,500,000           20,600,000 12,900,000
Business acquisition, issuance of common stock shares                   255,908 255,908
Business acquisition, issuance of common stock shares       $ 1,507,000           $ 3,100,000 £ 1,900,000