Acquisitions (Aarding) - Additional Information (Detail) $ in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 EUR (€)
Business Acquisition [Line Items]
Fair value adjustments to earnout liabilities	$ 11,222
Aarding Thermal Acoustics B.V. ("Aarding") [Member]
Business Acquisition [Line Items]
Cash paid on acquisition	$ 24,400
Company's common stock | shares	763,673
Fair value of common stock issued	$ 6,800
Business combination contingent consideration paid	4,400			€ 4.0
Prepaid compensation recognized in Prepaid expenses and other current assets	900	$ 1,000
Prepaid compensation recognized in Deferred Charges and other assets	1,000	2,100
Business combination compensation expenses	900	1,100
Earn out payment upon attainment of specified financial targets through December 31, 2015	6,000			€ 5.5
Fair value adjustments to earnout liabilities	1,200	1,500
Earn out expenses included in accounts payable and accrued expenses	1,000	1,100
Revenue from acquired entity	45,300	31,200	$ 27,400
Income from acquired entity	$ (1,100)	$ (3,200)	$ 300