Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Fair Value Of Financial Instruments [Line Items]
Fair value of note payable	$ 5,300	$ 5,300
Cash and cash equivalents	44,999	45,824	$ 33,390	$ 34,194
Cash held outside United States, principally in Netherlands, United Kingdom, China, and Canada	28,900	25,600
Credit Agreement [Member]
Fair Value Of Financial Instruments [Line Items]
Fair value of debt issued	$ 121,000	$ 125,100