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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 | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Total assets | $ 1,217,368 | $ 1,213,018
Other current assets | 28,735 | 16,715
Property, plant and equipment, net | 73,642 | 77,536
Other assets | 30,165 | 31,847
Reconciliation of Segment Assets to Consolidated Assets [Member] |  |
Segment Reporting Information [Line Items] |  |
Total assets | 260,220 | 259,471
Cash and cash equivalents and investments | 570,247 | 650,022
Other current assets | 41,157 | 30,143
Property, plant and equipment, net | 73,642 | 77,536
Goodwill and intangible assets, net | 241,937 | 163,999
Other assets | $ 30,165 | $ 31,847

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