Securities (Narrative) (Details)	1 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) maturity_group security	Dec. 31, 2019 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Transfer from HTM to AFS	$ 83,100,000
Transfer, unrealized holding gain	800,000
Reclassification adjustment for HTM to AFS securities, before tax	600,000
Equity securities carried at fair value through income	4,669,000	$ 4,855,000	$ 4,669,000
Other equity securities	209,000	207,000	209,000
Asset backed securities pledged to secure certain deposits	47,400,000	48,200,000	47,400,000
Asset backed securities pledged as collateral	0	$ 0	$ 0
number of securities sold | security		42	20
Net gains on sale of investment securities		$ 1,384,000	$ 226,000
Securities available for sale ("AFS"), at fair value	208,187,000	246,105,000	208,187,000
Amortized Cost of AFS securities	206,113,000	240,013,000	206,113,000
Gross unrealized gains of AFS securities	2,719,000	6,516,000	2,719,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	645,000	424,000	645,000
Other than temporary impairment losses, investments		0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	72,591,000	45,549,000	72,591,000
Debt Securities, Held-to-maturity, Transfer, Deferred Tax Liability	200,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	645,000	$ 424,000	645,000
Number of AFS maturity groups | maturity_group		4
Municipal bonds
Debt and Equity Securities, FV-NI [Line Items]
Securities available for sale ("AFS"), at fair value	11,318,000	$ 44,478,000	11,318,000
Amortized Cost of AFS securities	11,491,000	42,268,000	11,491,000
Gross unrealized gains of AFS securities	0	2,210,000	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	173,000	0	173,000
Debt Securities, Available-for-sale, Unrealized Loss Position	11,318,000		11,318,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	173,000		173,000
Asset-backed securities issued by Others
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	136,000	87,000	136,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	12,000	9,000	12,000
Available for Sale Securities Sold
Debt and Equity Securities, FV-NI [Line Items]
Securities available for sale ("AFS"), at fair value	31,600,000	62,500,000	31,600,000
Student Loan Trust and Other Collateralized Mortgage Obligations
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost of AFS securities		12,600,000
Student Loan Trust Collateralized Mortgage Obligations
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		100,000
Student Loan Trust Loans
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost of AFS securities		$ 37,100,000
Debt Securities, Available-for-sale, Government Guaranty, Percent		97.00%
Asset Backed Securities Issued By States, Political Subdivisions or Agencies
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost of AFS securities	11,500,000	$ 0	11,500,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	200,000		200,000
Asset-backed securities issued by GSEs and U.S. Agencies
Debt and Equity Securities, FV-NI [Line Items]
Amortized Cost of AFS securities	56,800,000	33,300,000	56,800,000
Debt Securities, Available-for-sale, Unrealized Loss Position	54,904,000	32,951,000	54,904,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 399,000	$ 327,000	$ 399,000