Debt - Summary of Debt (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Unamortized debt discount	$ (1,674,000)	$ (1,796,000)
Total outstanding borrowings	112,905,000us-gaap_LongTermDebt	112,428,000us-gaap_LongTermDebt
Less: current portion	11,463,000us-gaap_LongTermDebtCurrent	8,887,000us-gaap_LongTermDebtCurrent
Total debt, less current portion	101,442,000us-gaap_LongTermDebtNoncurrent	103,541,000us-gaap_LongTermDebtNoncurrent
Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	87,881,000	90,072,000
US Dollar Borrowings [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	110,207,000	112,276,000
US Dollar Borrowings [Member] \| U.S. Dollar Revolving Loans [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility	24,000,000	24,000,000
U S Dollar Euro [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	109,000	152,000
Aarding Thermal Acoustics B.V. ("Aarding") [Member] \| US Dollar Borrowings [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	$ 2,589,000

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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