Inventories (Tables)

3 Months Ended

Apr. 01, 2012

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	April 1, 2012		December 31, 2011
Raw materials and assembled parts	$	75,427	$	68,105
Service inventories, estimated current requirements	15,129		13,978
Work-in-process	66,120		66,275
Finished goods	37,375		33,652
Total current inventories	$	194,051	$	182,010
Non-current inventories	$	61,687	$	57,575