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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
Mar. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Total assets $ 1,222,760 $ 1,213,018
Other current assets 17,552 16,715
Property, plant and equipment, net 75,517 77,536
Other assets 34,383 31,847
Reconciliation of Segment Assets to Consolidated Assets [Member]
    
Segment Reporting Information [Line Items]    
Total assets 266,974 259,471
Cash and cash equivalents and investments 647,223 650,022
Other current assets 35,032 30,143
Property, plant and equipment, net 75,517 77,536
Goodwill and intangible assets, net 163,631 163,999
Other assets $ 34,383 $ 31,847