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Future Minimum Royalties Payable (Detail) (Royalty Agreements, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Royalty Agreements
 
Contractual Obligation [Line Items]  
2015 $ 8,632us-gaap_ContractualObligationDueInNextTwelveMonths
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
2016 2,574us-gaap_ContractualObligationDueInSecondYear
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
2017 2,085us-gaap_ContractualObligationDueInThirdYear
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
2018 1,952us-gaap_ContractualObligationDueInFourthYear
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
2019 1,870us-gaap_ContractualObligationDueInFifthYear
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
Thereafter 596us-gaap_ContractualObligationDueAfterFifthYear
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember
Total $ 17,709us-gaap_ContractualObligation
/ us-gaap_OtherCommitmentsAxis
= us-gaap_RoyaltyAgreementsMember