Share-Based Payments - Restricted Stock Activity (Details) - Restricted Stock	6 Months Ended
	Mar. 31, 2026 $ / shares shares
RSUs
Non-vested at beginning of period (in shares) | shares	1,648,145
Granted (in shares) | shares	562,480
Vested (in shares) | shares	(554,646)
Expired or forfeited (in shares) | shares	(31,490)
Non-vested at end of period (in shares) | shares	1,624,489
Weighted- average Grant-date Fair Value
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ / shares	$ 30.22
Granted, weighted-average grant-date fair value (in dollars per share) | $ / shares	27.65
Vested, weighted-average grant-date fair value (in dollars per share) | $ / shares	28.17
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | $ / shares	31.61
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ / shares	$ 30.01