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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

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