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Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Finite-Lived Intangible Assets And Liabilities [Line Items] |  |
Gross | $ 188,826 | $ 152,498
Accumulated Amortization | 59,666 | 52,287
Net Book Value | 129,160 | 100,211
Product Rights |  |
Finite-Lived Intangible Assets And Liabilities [Line Items] |  |
Gross | 167,694 | 138,466
Accumulated Amortization | 56,233 | 49,796
Net Book Value | 111,461 | 88,670
Customer Lists |  |
Finite-Lived Intangible Assets And Liabilities [Line Items] |  |
Gross | 3,091 | 1,091
Accumulated Amortization | 744 | 437
Net Book Value | 2,347 | 654
Trademarks |  |
Finite-Lived Intangible Assets And Liabilities [Line Items] |  |
Gross | 18,041 | 12,941
Accumulated Amortization | 2,689 | 2,054
Net Book Value | $ 15,352 | $ 10,887

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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