Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total debt	$ 85,583	$ 90,775
Current portion	(4,505)	(5,306)
Long-term debt, less current maturities	$ 81,078	85,469
US Term Note
Debt Instrument [Line Items]
Interest Rate	1.78%
Total debt	$ 48,125	49,375
Europe Term Loan
Debt Instrument [Line Items]
Interest Rate	1.50%
Total debt	$ 21,447	23,963
US Revolving Note
Debt Instrument [Line Items]
Interest Rate	1.69%
Total debt	$ 12,000	12,000
DEG Loan
Debt Instrument [Line Items]
Interest Rate	4.25%
Total debt	$ 4,011	4,805
Capital Lease
Debt Instrument [Line Items]
Total debt		$ 632