Commitments and Contingencies - Activity With Respect to Claims and Contingencies (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Claims and contingencies, Balance at beginning of period		$ 16,918	$ 15,574
Additional accruals, other	[1]	6,509	5,517
Payments, other	[2]	(7,639)	(6,085)
Claims and contingencies, Balance at end of period		$ 15,788	$ 15,006

[1] Consists of accruals for legal fees.

[2] Consists of payments for legal and other contingencies.