Restructuring and other impairment charges - reconciliation of changes in accrued liabilities associated with restructuring program (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
2016 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	$ 8,895	$ 0
Subsequent accruals	2,097	12,510
Cash payments	(3,314)	(3,784)
Foreign currency translation	(13)	169
Balance, ending	7,665	8,895
2014 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	5,370	7,447
Subsequent accruals	755	119
Cash payments	(2,199)	(2,196)
Balance, ending	3,926	5,370
Termination benefits | 2016 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	8,135	0
Subsequent accruals	1,314	11,176
Cash payments	(2,096)	(3,220)
Foreign currency translation	(57)	179
Balance, ending	7,296	8,135
Termination benefits | 2014 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	5,370	7,447
Subsequent accruals	687	81
Cash payments	(2,131)	(2,158)
Balance, ending	3,926	5,370
Facility closure and other exit costs | 2016 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	0	0
Subsequent accruals	420	468
Cash payments	(420)	(469)
Foreign currency translation	0	1
Balance, ending	0	0
Facility closure and other exit costs | 2014 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	0	0
Subsequent accruals	68	38
Cash payments	(68)	(38)
Balance, ending	0	0
Contract termination costs | 2016 Manufacturing footprint realignment plan
Restructuring Reserve [Roll Forward]
Balance, beginning	760	0
Subsequent accruals	363	866
Cash payments	(798)	(95)
Foreign currency translation	44	(11)
Balance, ending	$ 369	$ 760