Senior Debt - Summary of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility	$ (1,796)	$ (1,918)
Total outstanding borrowings	112,428us-gaap_LongTermDebt	89,082us-gaap_LongTermDebt
Less: current portion	8,887us-gaap_LongTermDebtCurrent	9,922us-gaap_LongTermDebtCurrent
Total debt, less current portion	103,541us-gaap_LongTermDebtNoncurrent	79,160us-gaap_LongTermDebtNoncurrent
U.S. Dollar Revolving Loans [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility	52,000
Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	90,072	63,781
Multi-Currency Revolving Loans [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility
US Dollar Borrowings [Member] \| U.S. Dollar Revolving Loans [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility	24,000	22,000
US Dollar Borrowings [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	112,276	83,863
U S Dollar Euro [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	152	310
Flextor, Inc. ("Flextor") [Member] \| Canadian Dollar [Member]
Debt Instrument [Line Items]
Total outstanding borrowings
Aarding Thermal Acoustics B.V. ("Aarding") [Member] \| US Dollar Borrowings [Member]
Debt Instrument [Line Items]
Total outstanding borrowings		$ 4,909

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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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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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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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