Major Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Inventory Disclosure [Line Items]
Raw materials and purchased components	$ 80,556	$ 61,296
Service parts, garments and accessories	83,126	77,437
Finished goods	264,944	175,252
Less: reserves	(18,592)	(15,943)
Inventories	$ 410,034	$ 298,042