Senior Debt - Additional Information (Detail)	12 Months Ended					12 Months Ended																12 Months Ended			12 Months Ended						12 Months Ended			12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 CAD	Nov. 18, 2014 USD ($)	Dec. 31, 2014 Prime Rate [Member]	Dec. 31, 2014 Federal Funds Rate [Member]	Dec. 31, 2014 One-Month LIBOR [Member]	Dec. 31, 2014 Forward Contracts [Member] CAD	Dec. 31, 2014 Bank Guarantee Facility [Member] CAD	Dec. 31, 2014 Variable Line Of Credit [Member] CAD	Dec. 31, 2014 Term Loan [Member] USD ($)	Nov. 18, 2014 Term Loan [Member] USD ($)	Dec. 31, 2013 Term Loan [Member] USD ($)	Aug. 27, 2013 Term Loan [Member] USD ($)	Dec. 31, 2014 U.S. Dollar Revolving Loans [Member] USD ($)	Nov. 18, 2014 U.S. Dollar Revolving Loans [Member] USD ($)	Aug. 27, 2013 U.S. Dollar Revolving Loans [Member] USD ($)	Aug. 27, 2013 Multi-currency Revolving Credit Facility [Member] USD ($)	Dec. 31, 2014 Term Loan [Member] USD ($)	Dec. 31, 2014 Minimum [Member] USD ($)	Dec. 31, 2014 Minimum [Member] Cross Currency Interest Rate Contract [Member]	Dec. 31, 2014 Minimum [Member] Base Rate [Member]	Dec. 31, 2014 Maximum [Member]	Dec. 31, 2014 Maximum [Member] Cross Currency Interest Rate Contract [Member]	Dec. 31, 2014 Maximum [Member] Base Rate [Member]	Aug. 17, 2012 Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Dec. 31, 2014 Aarding Thermal Acoustics B.V. ("Aarding") [Member] Minimum [Member] EUR (€)	Aug. 17, 2012 Aarding Thermal Acoustics B.V. ("Aarding") [Member] Minimum [Member]	Dec. 31, 2014 Aarding Thermal Acoustics B.V. ("Aarding") [Member] Maximum [Member] EUR (€)	Dec. 31, 2014 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] USD ($)	Dec. 31, 2014 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Aug. 17, 2012 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Dec. 31, 2014 Bank Overdrafts [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member]	Aug. 17, 2012 Bank Overdrafts [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)
Line of Credit Facility [Line Items]
Senior secured credit facility															$ 65,000,000			$ 70,500,000	$ 19,500,000
Aggregate principal amount outstanding under the credit facilities												9,500,000		1,300,000		52,000,000				65,000,000											6,700,000	5,500,000
Increased credit facility commitment for either revolving credit facility or term loan facility					50,000,000								35,000,000				15,000,000
Unused credit availability under credit facility	71,500,000	66,700,000
Interest rate, basis spread							0.50%	1.00%
Companies consolidated leverage ratio, Base Rate						0.50%																1.50%	0.50%		2.50%	1.50%
Weighted average interest rate on outstanding borrowings	2.24%	2.23%																													2.73%	2.73%		2.03%
Maximum consolidated leverage ratio	3.25
Minimum fixed charge coverage ratio	1.25
Increased interest rate of loan due to default	2.00%
Other expenses for credit agreement	400,000	2,700,000
Capitalized deferred financing costs	500,000	600,000
Deferred charges Other asset	(1,796,000)	(1,918,000)
Amortization expense	600,000	300,000	200,000
Facilities agreement, amount				5,500,000					500,000	2,500,000	2,500,000																10,500,000	7,000,000		10,500,000			7,000,000		3,500,000
Working capital ratio, minimum	125.10%
Working capital, minimum																					1,000,000
Adjusted tangible net worth ratio, maximum																								2.501
Adjusted tangible net worth, minimum	1,300,000
Penalties on cancellation of agreement				0
Borrowers solvency ratio																													30.00%
Maximum debt as proportion of EBITDA																											3.0
Debt instrument variable interest rate description																															Three months Euribor plus 265 basis points	Three months Euribor plus 265 basis points		Three months Euribor plus 195 basis points