Revenue Recognition - Property Management Fees (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenue Recognition [Abstract]
Property management fee percent based on gross collected rents			3.00%
Property management fee percent based on the cost of construction			5.00%
Aggregate property management fees	$ 14,948	$ 11,024	$ 28,167	$ 23,403
construction supervision fees	$ 3,794	$ 1,327	$ 7,027	$ 3,829