Stock-Based Compensation (Exercise Price Range) (Details) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013
$6.75 - $8.03 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 6.75
Exercise Price Range, Upper Range	$ 8.03
Options Outstanding	752
Weighted Average Remaining Contractual Term	6 years 10 days
Weighted Average Exercise Price, Options Outstanding	$ 8.01
Number of Shares Vested, Options Exercisable	726
Weighted Average Exercise Price, Options Exercisable	$ 8.01
$8.04 - $9.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 8.04
Exercise Price Range, Upper Range	$ 9.50
Options Outstanding	1,312
Weighted Average Remaining Contractual Term	7 years 5 months 23 days
Weighted Average Exercise Price, Options Outstanding	$ 9.02
Number of Shares Vested, Options Exercisable	440
Weighted Average Exercise Price, Options Exercisable	$ 8.49
$9.51 - $10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 9.51
Exercise Price Range, Upper Range	$ 10.00
Options Outstanding	1,274
Weighted Average Remaining Contractual Term	5 years 11 months 26 days
Weighted Average Exercise Price, Options Outstanding	$ 9.68
Number of Shares Vested, Options Exercisable	905
Weighted Average Exercise Price, Options Exercisable	$ 9.70
$10.01 - $11.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 10.01
Exercise Price Range, Upper Range	$ 11.00
Options Outstanding	1,183
Weighted Average Remaining Contractual Term	6 years 1 month 24 days
Weighted Average Exercise Price, Options Outstanding	$ 10.65
Number of Shares Vested, Options Exercisable	786
Weighted Average Exercise Price, Options Exercisable	$ 10.66
$11.01 - $13.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 11.01
Exercise Price Range, Upper Range	$ 13.00
Options Outstanding	616
Weighted Average Remaining Contractual Term	3 years 7 months 20 days
Weighted Average Exercise Price, Options Outstanding	$ 12.36
Number of Shares Vested, Options Exercisable	594
Weighted Average Exercise Price, Options Exercisable	$ 12.37
$13.01 - $15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 13.01
Exercise Price Range, Upper Range	$ 15.00
Options Outstanding	656
Weighted Average Remaining Contractual Term	2 years 7 months 9 days
Weighted Average Exercise Price, Options Outstanding	$ 13.98
Number of Shares Vested, Options Exercisable	626
Weighted Average Exercise Price, Options Exercisable	$ 13.95
$15.01 - $16.88 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 15.01
Exercise Price Range, Upper Range	$ 16.88
Options Outstanding	486
Weighted Average Remaining Contractual Term	3 years 5 months 19 days
Weighted Average Exercise Price, Options Outstanding	$ 15.27
Number of Shares Vested, Options Exercisable	485
Weighted Average Exercise Price, Options Exercisable	$ 15.27
$6.75 - $16.88 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 6.75
Exercise Price Range, Upper Range	$ 16.88
Options Outstanding	6,279
Weighted Average Remaining Contractual Term	5 years 6 months 21 days
Weighted Average Exercise Price, Options Outstanding	$ 10.67
Number of Shares Vested, Options Exercisable	4,562
Weighted Average Exercise Price, Options Exercisable	$ 11.00