Inventories (Tables)

9 Months Ended

Sep. 30, 2011

Inventories [Abstract]

Major classes of inventories

	September 30, 2011		December 31, 2010
Finished goods	$	224,419	$	184,944
Service parts		158,532		166,317
Raw materials and work in process		129,406		93,314
Total inventories	$	512,357	$	444,575