Other Balance Sheet Information (Tables)

3 Months Ended

Dec. 31, 2012

Summary of Accounts Receivable

The following is a summary of accounts receivable at December 31, 2012 and September 30, 2012 (in thousands):

	December 31, 2012		September 30, 2012
Accounts receivable	$	64,793	$	79,706
Less allowances		961		851
	$	63,832	$	78,855

Summary of Inventories

The following is a summary of inventories at December 31, 2012 and September 30, 2012 (in thousands):

	December 31, 2012		September 30, 2012
Inventories
Raw materials and purchased parts	$	61,012	$	64,732
Work-in-process		25,525		20,800
Finished goods		18,586		17,453
	$	105,123	$	102,985

Product Warranty and Retrofit Activity on Gross Basis

Product warranty and retrofit activity on a gross basis for the three months ended December 31, 2012 and 2011 is as follows (in thousands):

Activity — Three Months Ended December 31, 2012

Balance September  30, 2012		Adjustments for acquisitions and divestitures		Accruals		Costs incurred			Balance December 31, 2012
$	7,329	$	962	$	2,363	$	(2,930	)	$	7,724

Activity — Three Months Ended December 31, 2011

Balance September  30, 2011		Adjustments for acquisitions and divestitures		Accruals		Costs incurred			Balance December 31, 2011
$	7,438	$	7	$	3,518	$	(3,670	)	$	7,293