Interest Rate Swaps - Amounts and Locations of Activity Related to Interest Rate Swaps Designated as Cash Flow Hedges (Details) - Interest Rate Swaps - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Interest rate contracts	$ (224)	$ (225)	$ (32)
Accrued interest payable and other liabilities
Derivative [Line Items]
Interest rate contract	(768)	(485)
Interest expense – subordinated debentures
Derivative [Line Items]
Other income	(224)	(63)	(164)
Other income
Derivative [Line Items]
Other income	$ 0	$ 0	$ 0