Stock-Based Compensation (Exercise Price Range) (Details) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014
$7.88 - $8.03 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 7.88
Exercise Price Range, Upper Range	$ 8.03
Options Outstanding	637
Weighted Average Remaining Contractual Term	4 years 11 months 23 days
Weighted Average Exercise Price, Options Outstanding	$ 8.01
Number of Shares Vested, Options Exercisable	637
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	1,234
Weighted Average Remaining Contractual Term	6 years 6 months 10 days
Weighted Average Exercise Price, Options Outstanding	$ 8.99
Number of Shares Vested, Options Exercisable	727
Weighted Average Exercise Price, Options Exercisable	$ 8.86
$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	974
Weighted Average Remaining Contractual Term	6 years 21 days
Weighted Average Exercise Price, Options Outstanding	$ 9.68
Number of Shares Vested, Options Exercisable	870
Weighted Average Exercise Price, Options Exercisable	$ 9.69
$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	1,781
Weighted Average Remaining Contractual Term	6 years 7 months 27 days
Weighted Average Exercise Price, Options Outstanding	$ 10.72
Number of Shares Vested, Options Exercisable	737
Weighted Average Exercise Price, Options Exercisable	$ 10.65
$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	517
Weighted Average Remaining Contractual Term	2 years 11 months 19 days
Weighted Average Exercise Price, Options Outstanding	$ 12.32
Number of Shares Vested, Options Exercisable	509
Weighted Average Exercise Price, Options Exercisable	$ 12.32
$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	478
Weighted Average Remaining Contractual Term	1 year 6 months 10 days
Weighted Average Exercise Price, Options Outstanding	$ 13.92
Number of Shares Vested, Options Exercisable	476
Weighted Average Exercise Price, Options Exercisable	$ 13.92
$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	408
Weighted Average Remaining Contractual Term	2 years 8 months 4 days
Weighted Average Exercise Price, Options Outstanding	$ 15.28
Number of Shares Vested, Options Exercisable	408
Weighted Average Exercise Price, Options Exercisable	$ 15.28
$7.88 - $16.88 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 7.88
Exercise Price Range, Upper Range	$ 16.88
Options Outstanding	6,029
Weighted Average Remaining Contractual Term	5 years 4 months 13 days
Weighted Average Exercise Price, Options Outstanding	$ 10.61
Number of Shares Vested, Options Exercisable	4,364
Weighted Average Exercise Price, Options Exercisable	$ 10.76