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Acquisition - Additional Information (Detail)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 20, 2012
Fred & Friends
USD ($)
Dec. 31, 2011
Fred & Friends
USD ($)
Dec. 31, 2012
Fred & Friends
USD ($)
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 ($)
Nov. 04, 2011
Creative Tops
GBP (£)
Dec. 31, 2011
Creative Tops
USD ($)
Dec. 31, 2011
Creative Tops
GBP (£)
Mar. 31, 2011
Creative Tops
USD ($)
Mar. 31, 2011
Creative Tops
GBP (£)
Dec. 31, 2011
Creative Tops
Customer Relationships
USD ($)
Dec. 31, 2011
Creative Tops
Trade Names
USD ($)
Business Acquisition [Line Items]                                    
Net sale of entity acquired $ 486,842,000 $ 444,418,000 $ 443,171,000   $ 16,600,000                   $ 42,300,000 £ 26,300,000    
Business acquisition, total purchase price       21,377,000             23,684,000              
Business acquisition cash paid, net of cash acquired     2,500,000 14,500,000             20,584,000 12,900,000            
Business acquisition, issuance of common stock shares       143,568             255,908 255,908            
Business acquisition, common stock value       1,507,000             3,100,000 1,900,000            
Contingent consideration value       (5,370,000)     4,000,000 1,400,000                    
Undiscounted contingent consideration, higher range           7,700,000                        
Purchase price allocation, intangible assets       13,592,000             16,892,000              
Purchase price allocation, amortizable intangible assets                 7,200,000 3,900,000             10,600,000 3,600,000
Purchase price allocation, goodwill amount     (2,500,000) 2,500,000                 2,700,000          
Percentage of equity interests acquired                     100.00% 100.00%            
Amount of consideration paid                     23,700,000 14,800,000            
Cash acquired from acquisition                         200,000 100,000        
Purchase price allocation, intangible assets                         13,300,000          
Purchase price allocation, deferred tax liability                         $ 3,600,000