Shareholders' Equity - Schedule of Forward Sales Executed (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Available | shares	3,071,724
Net proceeds available | $	$ 301,984
Forward Price | $ / shares	$ 98.31
Forward Sales Equity Agreement, Maturing Quarter ended June 30, 2022
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Available | shares	1,681,910
Net proceeds available | $	$ 166,989
Forward Price | $ / shares	$ 99.29
Forward Sales Equity Agreement, Maturing Quarter ended September 30, 2022
Forward Contract Indexed to Issuer's Equity [Line Items]
Shares Available | shares	1,389,814
Net proceeds available | $	$ 134,995
Forward Price | $ / shares	$ 97.13