Inventories (Tables)

6 Months Ended

Jun. 28, 2015

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	June 28, 2015		December 31, 2014
Raw materials and assembled parts	$	58,540	$	61,644
Service inventories, estimated current requirements	11,947		12,398
Work-in-process	86,275		76,402
Finished goods	24,897		25,996
Total current inventories	$	181,659	$	176,440
Non-current inventories	$	48,703	$	50,731