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Stock-Based Compensation (Exercise Price Range) (Details) (Stock Options [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Sep. 30, 2012
$2.40 - $8.00 [Member]
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range $ 2.4
Exercise Price Range, Upper Range $ 8.00
Options Outstanding 178
Weighted Average Remaining Contractual Term 3 years 9 months 7 days
Weighted Average Exercise Price, Options Outstanding $ 6.94
Number of Shares Vested, Options Exercisable 178
Weighted Average Exercise Price, Options Exercisable $ 6.94
$8.01 - $9.00 [Member]
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range $ 8.01
Exercise Price Range, Upper Range $ 9.00
Options Outstanding 1,262
Weighted Average Remaining Contractual Term 6 years 8 months 12 days
Weighted Average Exercise Price, Options Outstanding $ 8.22
Number of Shares Vested, Options Exercisable 1,019
Weighted Average Exercise Price, Options Exercisable $ 8.25
$9.01 - $10.00 [Member]
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range $ 9.01
Exercise Price Range, Upper Range $ 10.00
Options Outstanding 1,262
Weighted Average Remaining Contractual Term 7 years 0 months 14 days
Weighted Average Exercise Price, Options Outstanding $ 9.68
Number of Shares Vested, Options Exercisable 730
Weighted Average Exercise Price, Options Exercisable $ 9.71
$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 1,247
Weighted Average Remaining Contractual Term 7 years 4 months 27 days
Weighted Average Exercise Price, Options Outstanding $ 10.65
Number of Shares Vested, Options Exercisable 425
Weighted Average Exercise Price, Options Exercisable $ 10.68
$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
Options Outstanding 635
Weighted Average Remaining Contractual Term 4 years 10 months 17 days
Weighted Average Exercise Price, Options Outstanding $ 12.34
Number of Shares Vested, Options Exercisable 523
Weighted Average Exercise Price, Options Exercisable $ 12.51
$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 677
Weighted Average Remaining Contractual Term 3 years 11 months 12 days
Weighted Average Exercise Price, Options Outstanding $ 13.98
Number of Shares Vested, Options Exercisable 630
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 493
Weighted Average Remaining Contractual Term 4 years 9 months 14 days
Weighted Average Exercise Price, Options Outstanding $ 15.27
Number of Shares Vested, Options Exercisable 493
Weighted Average Exercise Price, Options Exercisable $ 15.27
$2.40 - $16.88 [Member]
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Lower Range $ 2.40
Exercise Price Range, Upper Range $ 16.88
Options Outstanding 5,754
Weighted Average Remaining Contractual Term 6 years 1 month 24 days
Weighted Average Exercise Price, Options Outstanding $ 10.76
Number of Shares Vested, Options Exercisable 3,998
Weighted Average Exercise Price, Options Exercisable $ 11.03