Derivative Financial Instruments (Details 2) - Non-hedging derivative financial instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Financial Instruments
Gain (loss)	$ 1,279	$ 1,274	$ 919
Interest rate swap contracts | Other expense
Derivative Financial Instruments
Gain (loss)	(650)	(252)	(30)
Interest rate swap contracts | Other income
Derivative Financial Instruments
Gain (loss)	879	1,356	1,028
Loan commitments | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	1,302	73	46
Forward contracts - mortgage loan | Mortgage banking income
Derivative Financial Instruments
Gain (loss)	$ (252)	$ 97	$ (125)