Other Current Liabilities - Schedule of Change in Customer Deposits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Contract With Customer Liability [Abstract]
Balance at beginning of the period	$ 4,014	$ 4,889	$ 4,304	$ 4,574
Satisfaction of performance obligations	(2,363)	(2,027)	(7,368)	(7,176)
Receipt of additional deposits	1,763	1,871	6,472	7,384
Other, primarily changes in foreign currency exchange rates	(67)	(87)	(61)	(136)
Balance at end of the period	$ 3,347	$ 4,646	$ 3,347	$ 4,646