Stock-Based Compensation (Options and Common Shares Reserved for Grant) (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Options Outstanding [Roll Forward]
Options Outstanding, Beginning Balance | shares	4,800
Options Outstanding, Granted | shares	553
Options Outstanding, Exercised | shares	(772)
Options Outstanding, Forfeited / Cancelled | shares	(618)
Options Outstanding, Ending Balance | shares	3,963
Options Outstanding, Exercisable | shares	2,857
Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$ 10.21
Weighted Average Exercise Price, Granted	11.46
Weighted Average Exercise Price, Exercised	9.65
Weighted Average Exercise Price, Forfeited / Cancelled	11.06
Weighted Average Exercise Price, Ending Balance	10.36
Weighted Average Exercise Price, Exercisable	$ 10.49
Weighted Average Remaining Contractual Term [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	4 years 6 months
Weighted Average Remaining Contractual Term, Exercisable	3 years 8 months 12 days
Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Outstanding | $	$ 6,078
Aggregate Intrinsic Value, Exercisable | $	$ 4,158
Closing Stock Price	$ 11.40