Borrowed Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates	one to 365
Amount of line of credit with correspondent banks	$ 51,000
Credit facility with Federal Reserve Bank	$ 119,000
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Interest rate, due in year two	1.55%
Interest rate, due in year three	0.00%	1.55%
Interest rate, due in year four	0.00%
Interest rate, due in year five	0.00%
Interest rate, due thereafter	0.00%
Due in twelve months maturity	$ 137,400	$ 105,000
Due in year two maturity	10,000	55,000
Due in year three maturity	0	10,000
Due in year four maturity	0
Due in year five maturity	105
Due thereafter	0	112
Total	147,505	170,112
Repurchase agreements for municipal and commercial customers	37,450	40,205
Total	$ 184,955	$ 210,317	$ 181,417	$ 181,858	$ 170,419	$ 265,274	$ 297,455	$ 244,229
Minimum
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates (days)	1 day
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Interest rate, due in next twelve months	1.60%	2.25%
Interest rate, due in year two		1.60%
Interest rate, due thereafter		0.00%
Interest rate, Repurchase agreements for municipal and commercial customers	0.10%	0.15%
Maximum
Disclosure of Repurchase Agreements [Abstract]
Range of repurchase agreements' maturity dates (days)	365 days
Federal Home Loan Bank, Advances, Maturities Summary [Abstract]
Interest rate, due in next twelve months	1.97%	2.58%
Interest rate, due in year two		1.97%
Interest rate, Repurchase agreements for municipal and commercial customers	2.33%	2.00%