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Financial Derivative Instruments (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) derivative	Dec. 31, 2019 USD ($) derivative	Mar. 31, 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	4	4	0
Derivative notional amount	$ 32,588,000	$ 32,748,000	$ 0
Other Liabilities | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ (3,280,000)	$ (1,205,000)	$ 0
Number of derivative instruments | derivative	2	2	0
Derivative notional amount	$ 16,394,000	$ 16,374,000	$ 0
Other Assets | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 3,280,000	$ 1,205,000	$ 0
Number of derivative instruments | derivative	2	2	0
Derivative notional amount	$ 16,394,000	$ 16,374,000	$ 0
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	(7,000)
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	$ (151,000)	199,000	586,000
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	$ (244,000)	278,000	847,000
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)	(57,000)
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)	(137,000)
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	0
Fair Value	$ 0	(98,000)	0
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	$ (663,000)	(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	$ (571,000)	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	$ (748,000)	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	$ (972,000)	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	$ (1,569,000)	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	$ (463,000)	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	(661,000)	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional Amount	220,000,000	150,000,000	125,000,000
Fair Value	(6,042,000)	$ 123,000	$ 1,232,000
Cash Flow Hedging | Designated as Hedging Instrument | Customer Loan Swaps
Derivative [Line Items]
Required amount to be pledged	9,322,000
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	$ 170,000,000
Number of derivative instruments | derivative	7
Cash Flow Hedging | Designated as Hedging Instrument | Customer Loan Swaps Maturity Dates December 19, 2029 and October 1, 2039
Derivative [Line Items]
Number of derivative instruments | derivative	2
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Collateral posted, cash	$ 3,100,000
Collateral posted, securities	$ 10,000,000

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