Litigation - Schedule of Loss Contingencies by Contingency (Detail) - Asbestos Claims [Member]	12 Months Ended
	Dec. 31, 2015 USD ($) Claim	Dec. 31, 2014 USD ($) Claim
Loss Contingencies [Line Items]
Total claims pending at the beginning of the period	8,457	8,319
New claims served	1,424	1,466
Claims dismissed	(3,339)	(1,094)
Claims settled	(330)	(234)
Total claims pending at the end of the period	6,212	8,457
Gross settlement and defense costs | $	$ 19,199,000	$ 20,801,000
Average gross settlement and defense costs per claim resolved | $	$ 5,230	$ 15,660