Stock-based Compensation - Restricted Stock Awards (Details) - shares	1 Months Ended	9 Months Ended
	Nov. 30, 2020	Jun. 30, 2021
Restricted Stock
Shares
Beginning of period (in shares)		1,406,154
Granted (in shares)		416,084
Vested (in shares)		(569,021)
Forfeited (in shares)		(28,488)
End of period (in shares)		1,224,729
Performance-Based Restricted Shares
Shares
Beginning of period (in shares)		796,024
Granted (in shares)		164,296
Vested (in shares)		(222,165)
Forfeited (in shares)		0
End of period (in shares)		738,155
Award vesting period		3 years
Performance based restricted stock settled in cash payment (in shares)	60,930
Time-Based Restricted Shares
Shares
Beginning of period (in shares)		610,130
Granted (in shares)		251,788
Vested (in shares)		(346,856)
Forfeited (in shares)		(28,488)
End of period (in shares)		486,574
Award vesting period		3 years