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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, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Total assets $ 1,197,901 $ 1,213,018
Other current assets 28,707 16,715
Property, plant and equipment, net 75,960 77,536
Other assets 33,939 31,847
Reconciliation of Segment Assets to Consolidated Assets [Member]
    
Segment Reporting Information [Line Items]    
Total assets 257,359 259,471
Cash and cash equivalents and investments 545,829 650,022
Other current assets 39,325 30,143
Property, plant and equipment, net 77,387 77,536
Goodwill and intangible assets, net 244,062 163,999
Other assets $ 33,939 $ 31,847