Major Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Inventory Disclosure [Line Items]
Raw materials and purchased components	$ 67,134	$ 61,296
Service parts, garments and accessories	80,441	77,437
Finished goods	227,082	175,252
Less: reserves	(16,697)	(15,943)
Inventories	$ 357,960	$ 298,042