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Business Segment, Geographic Area, Product and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Statement Of Financial Position [Abstract]    
Total segment assets $ 232,777 $ 216,699
Cash and cash equivalents and investments 598,227 627,399
Other current assets 46,472 36,242
Property, plant and equipment, net 78,875 80,516
Goodwill and intangible assets, net 162,535 162,294
Other assets 11,461 11,692
Total assets $ 1,130,347 $ 1,134,842