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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 |  |  |  |

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