Annual affordable housing tax credits and other tax benefits.

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Deferred loan processing fees.

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Finite lived intangible assets growth percentage.

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Loan guarantee description.

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Loan terms.

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Loan to value ratio.

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Loans and leases receivable, disbursed amount.

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Number of apartments.

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Proceeds from deferred loan processing fees.

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Proceeds from nonrefundable loan processing fees.

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Processing fee percentage.

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Qualified affordable housing project investments amortization period.

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Qualified affordable housing project investments funded period.

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Qualified affordable housing project investments recognition period.

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Amount of equity securities categorized neither as held-to-maturity nor as trading.

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Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.

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Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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Expenses paid for obtaining loans which includes expenses such as application and origination fees.

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Summary of Significant Accounting Policies (Narrative) (Details)		1 Months Ended	3 Months Ended		12 Months Ended		15 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) Apartment shares	Mar. 31, 2020 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)
Loans and leases receivable, net, carrying amount	$ 2,632,645,000		$ 2,632,645,000			$ 2,370,659,000	$ 2,632,645,000
Loans and leases, net of unearned interest	251,644,000		251,644,000			276,701,000	251,644,000
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 March 31, 2021 and December 31, 2020, consisted of a retail banking property which was closed and listed for sale on December 31, 2020 totaling $210,000 and in included in other assets on the Consolidated Balance Sheets.
Residential real estate held in other real estate owned	144,000		$ 144,000			134,000	144,000
Foreclosure proceedings in process	87,000		87,000			13,000	87,000
Carrying value of investment in limited partnership	135,000		$ 135,000			146,000	135,000
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			$ 281,000	$ 323,000
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
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	4,039,000		4,039,000			4,311,000	4,039,000
Amortization expense			$ 272,000	$ 310,000
Core Deposit Intangible, Amortization Period			10 years
Impairment of core deposit intangible			$ 0
Intangible assets, growth recognized			$ 192,247,000			$ 562,186,000
Finite Lived Intangible Assets Growth Percentage			8.00%			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	6,527,000		$ 6,527,000			$ 6,682,000	6,527,000
Non Interest Expense [Member]
Asset held for sale, impairment charge			0	0
Reserve for Off-balance Sheet Activities [Member]
Valuation allowances and reserves, balance	$ 66,000		$ 66,000			66,000	$ 66,000
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	$ 590,035,000		$ 590,035,000			388,313,000	$ 590,035,000
Loans and leases receivable, disbursed amount			$ 335,589,000			254,446,000
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	15,882,000		$ 15,882,000			20,883,000	36,765,000
Deferred loan processing fees	18,581,000		18,581,000			7,746,000	18,581,000
Proceeds from deferred loan processing fees			14,988,000			3,593,000
Loan processing fees			5,047,000	0
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	508,000		$ 508,000			515,000	508,000
Equity Securities [Member] \| ASU 2016-01 [Member]
Equity securities, fair value	$ 508,000		508,000			$ 515,000	$ 508,000
Equity securities sold			$ 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