Derivative Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2020 USD ($)
Derivative Instruments [Abstract]
Gain (loss) reclassified from accumulated other comprehensive income into interest expense, estimated time to transfer	12 months
Interest rate swap contract
Derivative Instruments [Abstract]
Interest rate swap, in loss position	$ 35,300
Reclassified from accumulated other comprehensive income into interest expense	$ 14,013