Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Summary of Inventories

	June 30,			December 31,
	2012			2011
Raw materials and subassemblies	$	40,440		$	45,829
Work-in-process		8,306			8,294
Finished goods		33,745			29,059
Reserve for excess and obsolete inventories		(12,989	)		(13,037	)
Total	$	69,502		$	70,145