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Inventories
6 Months Ended
Jul. 01, 2012
Inventory Disclosure [Abstract]  
Inventories
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 other long-term assets. 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):
 
July 1,
2012
 
December 31,
2011
Raw materials and assembled parts
$
71,251

 
$
68,105

Service inventories, estimated current requirements
15,593

 
13,978

Work-in-process
81,360

 
66,275

Finished goods
25,093

 
33,652

Total current inventories
$
193,297

 
$
182,010

Non-current inventories
$
64,029

 
$
57,575