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Borrowing Arrangements - Subordinated Debt (Details) - USD ($)		3 Months Ended
	May 26, 2017	Dec. 31, 2019	Dec. 31, 2020	Dec. 19, 2019
Principal amount	$ 40,000,000
Fixed interest rate (as a percent)	5.25%
Subordinated Debt.		$ 39,554,000	$ 39,740,000
Debt Issuance Costs			260,000
Presidio bank
Fixed interest rate (as a percent)		8.00%
Subordinated Debt.			$ 10,000,000	$ 10,000,000
Pre-payment penalty		$ 300,000
LIBOR
Rate of interest added to base rate	336.50%

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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