Litigation - Summary of Activity in Asbestos Insurance Recoveries (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Insurance receivable - asbestos, beginning of the year	$ 118,115
Changes in estimated coverage	16,340
Asbestos Claims [Member]
Loss Contingencies [Line Items]
Insurance receivable - asbestos, beginning of the year	118,115	126,206
Settlement and defense costs paid by insurance carriers	(23,714)	(15,468)
Changes in estimated coverage	16,340	7,377
Insurance receivable - asbestos, end of the year	$ 110,741	$ 118,115