Other Income (Loss), Net - Schedule of Other Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Long Lived Assets Held-for-sale [Line Items]
Interest income	$ 3,596	$ 2,827	$ 1,525
(Loss) gain on asset dispositions, net	(557)	593	1,724
Other, net	(1,249)	710	836
Disposal of non-core product lines	0	0	(4,223)
Impairment of intangible assets	0	0	(723)
Total other income (loss), net	$ 1,790	$ 4,130	(861)
Safety Works
Long Lived Assets Held-for-sale [Line Items]
Impairment of intangible assets			(700)
Property in Australia
Long Lived Assets Held-for-sale [Line Items]
(Loss) gain on asset dispositions, net			2,000
Americas | Safety Works
Long Lived Assets Held-for-sale [Line Items]
Disposal of non-core product lines			$ (4,200)