Securities (Narrative) (Details)	1 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) numberOfSecurities	Jun. 30, 2020 USD ($) numberOfSecurities	Dec. 31, 2019 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Held-to-maturity, Transfer, Amount	$ 83,100,000
Debt Securities, Held-to-maturity, Transfer, Unrealized Gain (Loss)	810,000
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	587,000
Debt Securities, Held-to-maturity, Transfer, Deferred Tax Liability	223,000
Unrealized loss position	72,591,000	$ 64,241,000		$ 64,241,000	$ 72,591,000
Debt securities, available-for-sale, unrealized loss position, accumulated loss	645,000	907,000		907,000	645,000
Asset-backed securities pledged to secure certain deposits	47,400,000	50,100,000		50,100,000	47,400,000
Asset-backed securities pledged as collateral	0	0		0	0
Other-than temporary impairment charges			$ 0	0
Available for sale securities	208,187,000	234,982,000		$ 234,982,000	208,187,000
Debt and Equity Securities, Gain (Loss)		112,000	$ 226,000
Number of securities sold | numberOfSecurities			20	2
Amortized Cost	206,113,000	228,872,000		$ 228,872,000	206,113,000
Residential Mortgage Backed Securities ("MBS")
Debt and Equity Securities, FV-NI [Line Items]
Available for sale securities	36,092,000	30,931,000		30,931,000	36,092,000
Amortized Cost	35,351,000	29,084,000		29,084,000	35,351,000
Residential Collateralized Mortgage Obligations ("CMOs")
Debt and Equity Securities, FV-NI [Line Items]
Available for sale securities	146,932,000	131,933,000		131,933,000	146,932,000
Amortized Cost	145,479,000	128,466,000		128,466,000	145,479,000
Asset-backed securities issued by GSEs and U.S. Agencies
Debt and Equity Securities, FV-NI [Line Items]
Unrealized loss position	54,904,000	36,880,000		36,880,000	54,904,000
Debt securities, available-for-sale, unrealized loss position, accumulated loss	399,000	189,000		$ 189,000	399,000
Available for sale securities with unrealized losses, average life			4 years 8 months 4 days	7 years 5 months 4 days
Available for sale securities with unrealized losses, average duration			4 years 2 months 19 days	7 years 10 days
Amortized Cost	56,800,000	37,100,000		$ 37,100,000	56,800,000
Asset-backed securities issued by Others
Debt and Equity Securities, FV-NI [Line Items]
Unrealized loss position	136,000	17,657,000		17,657,000	136,000
Debt securities, available-for-sale, unrealized loss position, accumulated loss	12,000	698,000		698,000	12,000
Callable GSE Agency Bonds
Debt and Equity Securities, FV-NI [Line Items]
Available for sale securities	2,002,000				2,002,000
Amortized Cost	2,001,000				2,001,000
Student Loan Trust CMOs
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, available-for-sale, unrealized loss position, accumulated loss		698,000		$ 698,000
Available for sale securities with unrealized losses, average life				6 years 7 months 6 days
Available for sale securities with unrealized losses, average duration				6 years 2 months 1 day
Available for sale securities		25,030,000		$ 25,030,000
Amortized Cost		25,684,000		25,684,000
Asset Backed Securities Issued By States, Political Subdivisions or Agencies
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, available-for-sale, unrealized loss position, accumulated loss	173,000	19,000		$ 19,000	$ 173,000
Available for sale securities with unrealized losses, average life				10 years 9 months 21 days	9 years 6 months 3 days
Available for sale securities with unrealized losses, average duration				9 years 4 months 24 days	8 years 2 months 4 days
Amortized Cost	11,500,000	8,200,000		$ 8,200,000	$ 11,500,000
Student Loan Trust and Other Collateralized Mortgage Obligations
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost		18,400,000		18,400,000
Student Loan Trust Loans
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost		$ 25,700,000		$ 25,700,000
Debt Securities, Available-for-sale, Government Guaranty, Percent		97.00%		97.00%
Available for Sale Securities Sold
Debt and Equity Securities, FV-NI [Line Items]
Available for sale securities	$ 31,600,000	$ 3,400,000		$ 3,400,000	$ 31,600,000