Equity Plans and Share-based Compensation (Weighted-Average Remaining Contractual Life And Exercise Price Of Options Outstanding And Exercisable) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012
$3.59 - $7.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 3.59
Exercise price upper range	$ 7.99
Options Outstanding, Number Outstanding	77
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	2.12
Options Outstanding, Weighted Average Exercise Price	$ 7.58
Options Exercisable, Number Exercisable	77
Options Exercisable, Weighted Average Exercise Price	$ 7.58
$8.25 - $9.81
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 8.25
Exercise price upper range	$ 9.81
Options Outstanding, Number Outstanding	33
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	1.30
Options Outstanding, Weighted Average Exercise Price	$ 9.63
Options Exercisable, Number Exercisable	33
Options Exercisable, Weighted Average Exercise Price	$ 9.63
$10.11 - $10.67
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 10.11
Exercise price upper range	$ 10.67
Options Outstanding, Number Outstanding	82
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	2.04
Options Outstanding, Weighted Average Exercise Price	$ 10.57
Options Exercisable, Number Exercisable	82
Options Exercisable, Weighted Average Exercise Price	$ 10.57
$11.20 - $12.89
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 11.20
Exercise price upper range	$ 12.89
Options Outstanding, Number Outstanding	342
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	2.90
Options Outstanding, Weighted Average Exercise Price	$ 12.43
Options Exercisable, Number Exercisable	342
Options Exercisable, Weighted Average Exercise Price	$ 12.43
$13.37 - $17.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 13.37
Exercise price upper range	$ 17.55
Options Outstanding, Number Outstanding	93
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	3.52
Options Outstanding, Weighted Average Exercise Price	$ 16.05
Options Exercisable, Number Exercisable	93
Options Exercisable, Weighted Average Exercise Price	$ 16.05
$3.59 - $17.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 3.59
Exercise price upper range	$ 17.55
Options Outstanding, Number Outstanding	627
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	2.70
Options Outstanding, Weighted Average Exercise Price	$ 11.98
Options Exercisable, Number Exercisable	627
Options Exercisable, Weighted Average Exercise Price	$ 11.98