Equity (Schedule of Restricted Stock Activity) (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of RSUs vested | $	$ 2.0	$ 2.8
Remaining unamortized stock-based compensation expense | $	$ 4.3
Number of Shares
Non-vested, beginning balance (in shares) | shares	778,084
Granted (in shares) | shares	296,043
Vested (in shares) | shares	(313,857)
Forfeited (in shares) | shares	(12,763)
Non-vested, ending balance (in shares) | shares	747,507
Weighted Average Grant Date Fair Value
Non-vested, beginning balance (in usd per share) | $ / shares	$ 5.91
Granted (in usd per share) | $ / shares	6.53	$ 8.04
Vested (in usd per share) | $ / shares	5.32
Forfeited (in usd per share) | $ / shares	4.16
Non-vested, ending balance (in usd per share) | $ / shares	$ 6.43
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining unamortized stock-based compensation expense | $	$ 0.1
Number of Shares
Non-vested, beginning balance (in shares) | shares	8,154
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Non-vested, ending balance (in shares) | shares	8,154
Weighted Average Grant Date Fair Value
Non-vested, beginning balance (in usd per share) | $ / shares	$ 8.20
Granted (in usd per share) | $ / shares	0.00
Vested (in usd per share) | $ / shares	0.00
Forfeited (in usd per share) | $ / shares	0.00
Non-vested, ending balance (in usd per share) | $ / shares	$ 8.20