INVENTORIES

Inventories are stated at the lower of cost or market, with cost determined by standard cost methods, which approximate the first-in, first-out method. Inventory costs include material, labor and manufacturing overhead. Service inventories that exceed the estimated requirements for the next 12 months based on recent usage levels are reported as a long-term asset. Management has established inventory reserves based on estimates of excess and/or obsolete current and non-current inventory.

Inventories consisted of the following (in thousands):



	April 3, 2016		December 31, 2015
Raw materials and assembled parts	$	74,065	$	56,348
Service inventories, estimated current requirements	13,559		11,556
Work-in-process	82,321		75,710
Finished goods	29,867		26,899
Total current inventories	$	199,812	$	170,513
Non-current inventories	$	54,981	$	47,109