Share-Based Compensation (Nonvested Share Activity) (Details)	9 Months Ended
	Jun. 30, 2020 $ / shares shares
Shares
Nonvested at beginning of period | shares	2,379,000
Granted (shares) | shares	800,000
Vested (shares) | shares	(770,000)
Forfeited (shares) | shares	(106,000)
Nonvested at end of period | shares	2,303,000
Weighted Average Grant Date Fair Value/Share
Weighted average grant date fair value, nonvested, beginning balance (in dollars per share) | $ / shares	$ 4.96
Weighted average grant date fair value, granted (in dollars per share) | $ / shares	6.06
Weighted average grant date fair value, vested (in dollars per share) | $ / shares	4.77
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares	4.97
Weighted average grant date fair value, nonvested, ending balance (in dollars per share) | $ / shares	$ 5.40