Quarterly report pursuant to Section 13 or 15(d)

Other Intangible Assets (Detail)

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Other Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, Carrying Amount $ 165,363 $ 156,058
Finite-lived intangible assets, Carrying Amount 125,793 116,480
Finite-lived intangible assets, Accumulated Amortization (59,421) (51,418)
Finite-lived intangible assets, Net 66,372 65,062
Total intangible assets, Net 105,942 104,640
Developed product technologies
   
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Amortization Period 3 years  
Finite-lived intangible assets, Carrying Amount 38,530 32,983
Finite-lived intangible assets, Accumulated Amortization (26,726) (23,215)
Finite-lived intangible assets, Net 11,804 9,768
Customer Relationships
   
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Carrying Amount 81,613 77,847
Finite-lived intangible assets, Accumulated Amortization (28,303) (24,151)
Finite-lived intangible assets, Net 53,310 53,696
Customer Relationships | Minimum
   
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Amortization Period 1 year  
Customer Relationships | Maximum
   
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Amortization Period 10 years  
Vendor Relationships
   
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Amortization Period 7 years  
Finite-lived intangible assets, Carrying Amount 5,650 5,650
Finite-lived intangible assets, Accumulated Amortization (4,392) (4,052)
Finite-lived intangible assets, Net 1,258 1,598
Trade Names
   
Finite-Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets, Accumulated Amortization $ 39,570 $ 39,578