12. Other Balance Sheet Information

Components of other selected captions in the Consolidated Balance Sheets are as follows (in thousands):


	June 30, 2012		September 30, 2011
Accounts receivable	$	88,077	$	77,318
Less allowances		780		617

	$	87,297	$	76,701

Inventories
Raw materials and purchased parts	$	67,810	$	65,770
Work-in-process		22,304		29,460
Finished goods		16,705		12,424

	$	106,819	$	107,654

The Company provides for the estimated cost of product warranties, primarily from historical information, at the time product revenue is recognized and retrofit accruals at the time retrofit programs are established. The Company’s warranty obligation is affected by product failure rates, utilization levels, material usage, service delivery costs incurred in correcting a product failure, and supplier warranties on parts delivered to the Company. Product warranty and retrofit activity on a gross basis for the three and nine months ended June 30, 2012 and 2011 is as follows (in thousands):

Activity — Three Months Ended June 30, 2012


Balance March 31, 2012		Accruals		Settlements			Balance June 30, 2012
$	7,281	$	3,365	$	(3,276	)	$	7,370

Activity — Three Months Ended June 30, 2011


Balance March 31, 2011		Accruals		Settlements			Balance June 30, 2011
$	7,667	$	3,659	$	(3,709	)	$	7,617

Activity — Nine Months Ended June 30, 2012


Balance September 30, 2011		Adjustments for acquisitions and divestitures		Accruals		Settlements			Balance June 30, 2012
$	7,438	$	7	$	10,288	$	(10,363	)	$	7,370

Activity — Nine Months Ended June 30, 2011


Balance September 30, 2010		Accruals		Settlements			Balance June 30, 2011
$	8,195	$	8,580	$	(9,158	)	$	7,617