Stock Based Compensation (Restricted Stock and Restricted Stock Units Activity) (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at end of period (shares)	5,621,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (shares)	323,000	382,000	69,000
Granted (shares)	121,000	106,000	362,000
Vested (shares)	(172,000)	(165,000)	(49,000)
Forfeited (shares)	(3,000)	0	0
Outstanding at end of period (shares)	269,000	323,000	382,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted-Average Grant Date Fair Value, Outstanding at beginning of period	$ 8.41	$ 7.84	$ 7.21
Weighted-average fair value of grants	$ 9.14	$ 9.42	$ 7.82
Weighted Average Grant Date Fair Value, Vested	$ 7.94	$ 7.73	$ 6.75
Weighted-Average Grant Date Fair Value, Forfeited	$ 10.64	$ 10.64	$ 8.80
Weighted-Average Grant Date Fair Value, Outstanding at end of period	$ 9.02	$ 8.41	$ 7.84
Aggregate Intrinsic Value, Vested	$ 1,612,000	$ 1,563,000	$ 492,000
Aggregate Intrinsic Value, Outstanding at September 30, 2013	$ 2,934,000