Inventories (Tables)

9 Months Ended

12 Months Ended

Sep. 29, 2012

Dec. 31, 2011

Summary of Inventories

Inventories consist of the following (in thousands):

	September 29, 2012			December 31, 2011
Components and raw materials	$	47,411		$	50,322
Work in process		5,310			4,681
Finished goods		83,966			60,839
Inventory held on consignment		23,846			27,003
		160,533			142,845
Less inventory reserves		(16,732	)		(14,146	)
	$	143,801		$	128,699

Inventories consist of the following (in thousands):

	December 31, 2011			December 31, 2010
Components and raw materials	$	50,322		$	27,287
Work in process		4,681			5,478
Finished goods		60,839			51,956
Inventory held on consignment		27,003			22,592
		142,845			107,313
Inventory reserves		(14,146	)		(12,853	)
	$	128,699		$	94,460

Summary of Activity of Reserves in Inventory

A summary of the activity in our reserves for estimated slow moving, excess, obsolete and otherwise impaired inventory is presented below (in thousands):

	Nine Months Ended
	September 29, 2012			October 1, 2011
Balance, beginning of period	$	14,146		$	12,853
Provision charged to cost of sales		4,440			5,812
Write-offs, net of recoveries		(1,854	)		(3,539	)
Balance, end of period	$	16,732		$	15,126

A summary of the activity in our reserves for estimated slow moving, excess, obsolete and otherwise impaired inventory is presented below (in thousands):

	Year Ended December 31,
	2011			2010			2009
Balance, beginning of year	$	12,853		$	13,063		$	17,798
Provision charged to costs of sales		7,706			6,596			7,462
Write-offs, net of recoveries		(6,413	)		(6,806	)		(12,197	)
Balance, end of year	$	14,146		$	12,853		$	13,063