Property And Equipment (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Abstract]
Computer hardware and software	$ 217,724,000	$ 224,558,000
Furniture and fixtures	19,211,000	20,878,000
Leasehold improvements	35,289,000	46,393,000
Gross property and equipment	272,224,000	291,829,000
Accumulated depreciation and amortization	(207,572,000)	(228,363,000)
Net property and equipment	64,652,000	63,466,000	62,569,000
Depreciation expense	$ 31,500,000	$ 30,400,000	$ 28,700,000