Balance Sheet Details (Tables)

3 Months Ended

Dec. 31, 2012

Balance Sheet Details

Schedule of components of accounts receivable

The components of accounts receivable are as follows (in thousands):

	December 31,			September 30,
	2012			2012
Trade and other receivables	$	19,701		$	17,543
Long-term contracts:
Billed	84,961			91,132
Unbilled	276,520			264,555
Allowance for doubtful accounts	(421		)	(463		)
Total accounts receivable	380,761			372,767
Less estimated amounts not currently due	(21,460		)	(22,070		)
Current accounts receivable	$	359,301		$	350,697

Components of inventories

Inventories consist of the following (in thousands):

	December 31,			September 30,
	2012			2012
Work in process and inventoried costs under long-term contracts	$	85,411		$	78,796
Customer advances	(33,086		)	(27,288		)
Raw material and purchased parts	770			858
Net inventories	$	53,095		$	52,366