Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventory Disclosure [Abstract]

Components of inventories

Our inventories are valued at the lower of cost or market and computed on a first-in, first-out (FIFO) basis. Components of inventories are as follows (in thousands):

	June 30,		December 31,
	2012		2011
Parts and raw materials	$	56,308	$	57,962
Work in process	6,240		3,708
Finished goods	18,061		18,613
	$	80,609	$	80,283