Commitments and Contingent Liabilities - Summary of Changes in Product Warranty/Liability Reserve (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Product Warranties Disclosures [Abstract]
Warranty reserve, beginning of year	$ 62,742	$ 64,008	$ 69,787
Provision	82,860	41,138	37,040
Payments	(44,095)	(42,404)	(42,819)
Warranty reserve, end of year	$ 101,507	$ 62,742	$ 64,008