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Financial Derivative Instruments (Details)	6 Months Ended
	Jun. 30, 2020 USD ($) derivative	Dec. 31, 2019 USD ($) derivative	Jun. 30, 2019 USD ($) derivative
Interest Rate Swap
Derivative [Line Items]
Expense incurred from restructuring derivatives	$ 1,760,000
Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 0	$ 0	$ 0
Number of derivative instruments | derivative	6	4	2
Derivative notional amount	$ 49,842,000	$ 32,748,000	$ 25,818,000
Collateral posted, cash	3,100,000
Collateral posted, securities	10,000,000
Not Designated as Hedging Instrument | Customer Loan Swaps
Derivative [Line Items]
Required amount to be pledged	9,322,000
Other Liabilities | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ (3,613,000)	$ (1,205,000)	$ 991,000
Number of derivative instruments | derivative	3	2	1
Derivative notional amount	$ 24,921,000	$ 16,374,000	$ 12,914,000
Other Assets | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 3,613,000	$ 1,205,000	$ (991,000)
Number of derivative instruments | derivative	3	2	1
Derivative notional amount	$ 24,921,000	$ 16,374,000	$ 12,904,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2019
Derivative [Line Items]
Fixed Rate Paid	2.466%
Notional Amount	$ 0	0	25,000,000
Fair Value	$ 0	0	(45,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 27 2021
Derivative [Line Items]
Fixed Rate Paid	0.893%
Notional Amount	$ 20,000,000	20,000,000	20,000,000
Fair Value	$ (150,000)	199,000	300,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 28 2021
Derivative [Line Items]
Fixed Rate Paid	0.94%
Notional Amount	$ 30,000,000	30,000,000	30,000,000
Fair Value	$ (238,000)	278,000	423,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 5 2020
Derivative [Line Items]
Fixed Rate Paid	2.547%
Notional Amount	$ 0	25,000,000	25,000,000
Fair Value	$ 0	(96,000)	(160,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2020
Derivative [Line Items]
Fixed Rate Paid	2.603%
Notional Amount	$ 0	25,000,000	25,000,000
Fair Value	$ 0	(234,000)	(313,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2022
Derivative [Line Items]
Fixed Rate Paid	1.779%
Notional Amount	$ 0	25,000,000	25,000,000
Fair Value	$ 0	(98,000)	(110,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap August 2 2024
Derivative [Line Items]
Fixed Rate Paid	1.59%
Notional Amount	$ 12,500,000	12,500,000	0
Fair Value	$ (736,000)	(11,000)	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap August 5 2024
Derivative [Line Items]
Fixed Rate Paid	1.42%
Notional Amount	$ 12,500,000	12,500,000	0
Fair Value	$ (649,000)	85,000	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap February 12 2023
Derivative [Line Items]
Fixed Rate Paid	1.486%
Notional Amount	$ 25,000,000	0	0
Fair Value	$ (841,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap February 12 2024
Derivative [Line Items]
Fixed Rate Paid	1.477%
Notional Amount	$ 25,000,000	0	0
Fair Value	$ (1,124,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 28 2026
Derivative [Line Items]
Fixed Rate Paid	1.158%
Notional Amount	$ 50,000,000	0	0
Fair Value	$ (2,119,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap March 13 2025
Derivative [Line Items]
Fixed Rate Paid	0.855%
Notional Amount	$ 25,000,000	0	0
Fair Value	$ (659,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap March 13 2030
Derivative [Line Items]
Fixed Rate Paid	1.029%
Notional Amount	$ 20,000,000	0	0
Fair Value	$ (811,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap April 07 2023
Derivative [Line Items]
Fixed Rate Paid	0.599%
Notional Amount	$ 20,000,000	0	0
Fair Value	$ (210,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap April 07 2024
Derivative [Line Items]
Fixed Rate Paid	0.643%
Notional Amount	$ 20,000,000	0	0
Fair Value	(295,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional Amount	260,000,000	150,000,000	150,000,000
Fair Value	(7,832,000)	$ 123,000	$ 95,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap Maturity Date Prior to December 31, 2021
Derivative [Line Items]
Notional Amount	$ 50,000,000
Number of derivative instruments | derivative	2
Cash Flow Hedging | Designated as Hedging Instrument | Contract With Maturity Dates Beyond December 31, 2021
Derivative [Line Items]
Notional Amount	$ 210,000,000
Number of derivative instruments | derivative	9
Cash Flow Hedging | Designated as Hedging Instrument | Contract with Maturity Dates December 19, 2029, July 1, 2035, and October 1, 2039
Derivative [Line Items]
Number of derivative instruments | derivative	3

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