Summary of Significant Accounting Policies (Narrative) (Details)		3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended		21 Months Ended
	May 04, 2021 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) Apartment shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)
Loans and leases receivable, net, carrying amount		$ 2,356,196,000			$ 2,356,196,000			$ 2,370,659,000	$ 2,356,196,000
Loans and leases, net of unearned interest		213,878,000			213,878,000			276,701,000	213,878,000
Bank premises and equipment held for sale		210,000			$ 210,000			210,000	210,000
Asset held for sale, description					Bank premises and equipment designated as held for sale are carried at the lower of cost or market value, and at September 30, 2021 and December 31, 2020, consisted of one former retail banking property which was closed and listed for sale on December 31, 2020 totaling $210,000. Bank premises and equipment designated as held for sale is included within other assets on the Consolidated Balance Sheets.
Residential real estate held in other real estate owned		0			$ 0			134,000	0
Foreclosure proceedings in process		0			0			13,000	0
Carrying value of investment in limited partnership		113,000			$ 113,000			146,000	113,000
Number of apartments under the project | Apartment					37
Limited partner capital contribution		7,506,000			$ 7,506,000				7,506,000
Limited partner capital contribution, funded period					3 years
Project investment amortization period					10 years
Amortization expense		266,000	$ 317,000		$ 823,000	$ 966,000
Goodwill		62,840,000			$ 62,840,000			62,840,000	62,840,000
Goodwill, Impairment Loss			0			$ 0
Number of antidilutive shares | shares					0	0
Underwritten Public Offering [Member]
Number of shares issued | shares	2,990,000
Common stock, price per share | $ / shares	$ 25.00
Net proceeds received after underwriting discount and other estimated offering expenses	$ 70,238,000
Proceeds from follow-on common stock public offering	$ 74,750,000				$ 70,238,000
First Priority Financial Corp. [Member]
Goodwill acquired					39,744,000			39,744,000
Scottdale Bank and Trust Company [Member]
Goodwill acquired					19,178,000			19,178,000
Phoenix Bancorp Incorporated [Member]
Goodwill acquired					3,918,000			3,918,000
Core Deposit Intangible [Member]
Intangible assets, net		3,506,000			3,506,000			4,311,000	3,506,000
Amortization expense		262,000	300,000		$ 805,000	$ 919,000
Core Deposit Intangible, Amortization Period					10 years
Impairment of core deposit intangible					$ 0
Intangible assets, growth recognized					$ 487,300,000			$ 562,186,000
Finite Lived Intangible Assets Growth Percentage					20.00%			29.00%
Scenario Forecast [Member]
Total LIHTCs amount awarded for the project							$ 8,530,000
Annual LIHTCs amount under the housing project							$ 853,000
Project investment recognition period							10 years
Other Assets [Member]
Carrying value of investment in limited partnership		6,150,000			$ 6,150,000			$ 6,682,000	6,150,000
Non Interest Expense [Member]
Asset held for sale, impairment charge		0	0		0	0
Reserve for Off-balance Sheet Activities [Member]
Valuation allowances and reserves, balance		$ 68,000			$ 68,000			66,000	$ 68,000
Maximum [Member]
Non-residential consumer loans charged off on contractual basis in event of bankruptcy, in period		120 days			120 days				120 days
Commercial Portfolio [Member]
Loan terms					1 year
Loan to value ratio		80.00%			80.00%				80.00%
Residential Portfolio [Member] | Maximum [Member]
Loan terms					30 years
Loan to value ratio		100.00%			100.00%				100.00%
Loan to value ratio, exposure after private mortgage insurance					85.00%
Small Business Administration [Member] | PPP Loans [Member]
Loans and leases receivable, net, carrying amount		$ 229,679,000			$ 229,679,000			388,313,000	$ 229,679,000
Loans and leases receivable, disbursed amount				$ 216,187,000				13,492,000
Loan guarantee description					The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term.
Nonrefundable loan processing fees received					$ 17,997,000			20,883,000	38,880,000
Deferred loan processing fees		8,236,000			8,236,000			7,746,000	8,236,000
Proceeds from deferred loan processing fees					8,146,000			90,000
Loan processing fees		6,237,000	2,583,000		17,528,000	4,954,000
Loss reserve					$ 0			0
Small Business Administration [Member] | Maximum [Member] | PPP Loans [Member]
Processing fee percentage					5.00%
Small Business Administration [Member] | Minimum [Member] | PPP Loans [Member]
Processing fee percentage					1.00%
Equity Securities [Member]
Equity securities, fair value		505,000			$ 505,000			515,000	505,000
Equity Securities [Member] | ASU 2016-01 [Member]
Equity securities, fair value		505,000			505,000			$ 515,000	$ 505,000
Equity securities sold		$ 0	$ 0		$ 0	$ 0
Home equity lines of credit [Member] | Maximum [Member]
Loan terms					20 years
Loan to value ratio		85.00%			85.00%				85.00%
Home Equity Lines Of Credit [Member] | Maximum [Member]
Loan terms					5 years