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Loans Receivable and Allowance for Loan Losses (Composition of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 990,728		$ 924,676
Deferred fees, net	(2,049)		(95)
Total loans receivable	988,679		924,581
Allowance for loan losses	(10,312)	$ (9,088)	(8,509)	$ (8,228)	$ (8,349)	$ (8,452)
Net loans receivable	$ 978,367		$ 916,072
Percent of Loans	100.00%		100.00%
Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 226,120		$ 229,781
Allowance for loan losses	$ (1,652)	(1,644)	$ (1,552)	(1,447)	(1,455)	(1,328)
Percent of Loans	22.80%		24.90%
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 398,813		$ 391,327
Allowance for loan losses	$ (6,079)	(4,915)	$ (4,687)	(4,694)	(4,947)	(5,455)
Percent of Loans	40.30%		42.30%
Construction Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 15,182		$ 17,732
Allowance for loan losses	$ (86)	(87)	$ (95)	(112)	(108)	(93)
Percent of Loans	1.50%		1.90%
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 194,917		$ 134,150
Allowance for loan losses	$ (1,076)	(1,064)	$ (949)	(896)	(811)	(712)
Percent of Loans	19.70%		14.50%
Consumer Loans To Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 155,696		$ 151,686
Allowance for loan losses	$ (1,419)	$ (1,378)	$ (1,226)	$ (1,079)	$ (1,028)	$ (864)
Percent of Loans	15.70%		16.40%

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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