Securities - Securities Sold (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Debt Securities, Available-for-sale [Line Items]
Carrying Value		$ 199,532,000	$ 8,742,000	$ 212,137,000
Net Proceeds	$ 0	199,875,000	8,773,000	212,485,000
Gain/(Loss)	$ 0	343,000	31,000	348,000
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Carrying Value		1,112,000	2,696,000	11,799,000
Net Proceeds		1,111,000	2,561,000	11,813,000
Gain/(Loss)		(1,000)	(135,000)	14,000
Residential mortgage backed securities: | Government agency mortgage backed securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		70,926,000	6,046,000	72,556,000
Net Proceeds		70,322,000	6,212,000	71,944,000
Gain/(Loss)		(604,000)	$ 166,000	(612,000)
Residential mortgage backed securities: | Government agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Carrying Value		122,404,000		122,692,000
Net Proceeds		120,606,000		120,892,000
Gain/(Loss)		(1,798,000)		(1,800,000)
Commercial mortgage backed securities: | Government agency mortgage backed securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		4,838,000		4,838,000
Net Proceeds		4,720,000		4,720,000
Gain/(Loss)		(118,000)		(118,000)
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		252,000		252,000
Net Proceeds		257,000		257,000
Gain/(Loss)		5,000		5,000
Other equity securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		0		0
Net Proceeds		2,859,000		2,859,000
Gain/(Loss)		$ 2,859,000		$ 2,859,000