Litigation - Schedule of Loss Contingencies by Contingency (Detail) (Asbestos Claims [Member], USD $)	12 Months Ended
	Dec. 31, 2013 Claim	Dec. 31, 2012 Claim
Asbestos Claims [Member]
Loss Contingencies [Line Items]
Total claims pending at the beginning of the period	8,007	8,145
New claims served	1,432	1,538
Claims dismissed	(803)	(1,420)
Claims settled	(317)	(256)
Total claims pending at the end of the period	8,319	8,007
Gross settlement and defense costs	$ 22,618,000	$ 23,589,000
Average gross settlement and defense costs per claim resolved	$ 20,190	$ 14,070