Summary of Significant Accounting Policies Text Tags (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)
Accounting Policies [Abstract]
Financing Receivable, Number of Principal and Interest Payment Deferrals	12	85
Financing Receivable, Principal and Interest Deferred Payments	$ 4,800	$ 92,800
Number of Loans Originated Under the Paycheck Protection Program	203
Loans Originated Under the Paycheck Protection Program, Amount	$ 34,700
Advances under Paycheck Protection Program Liquidity Facility	$ 28,200