Fair Values of Financial Instruments - Reconciliation of Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - Municipal- Taxable [Member] - Fair Value Inputs Level 3 [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning Balance of recurring Level 3 assets	$ 0
Purchase	1,000
Unrealized gain	(6)
Ending Balance of recurring Level 3 assets	$ 994