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COVID-19 Pandemic Implications (Narrative) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended | 27 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2022 | Mar. 31, 2021
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Loans and leases receivable, gross, carrying amount | $ 3,121,531,000 | $ 3,121,531,000 | $ 3,104,396,000 |  | $ 3,121,531,000 | $ 2,646,236,000
CARES Act [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Loans and leases receivable, gross, carrying amount | $ 3,571,000 | $ 3,571,000 | $ 3,571,000 |  | $ 3,571,000 |
Maximum [Member] | CARES Act [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Qualifying deferment status percentage of loan portfolio | 1.00% | 1.00% | 1.00% |  | 1.00% |
Coronavirus Aid, Relief, and Economic Security Act [Member] | CARES Act [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Loans and leases receivable, gross, carrying amount | $ 3,571,000 | $ 3,571,000 | $ 3,571,000 |  | $ 3,571,000 |
Coronavirus Aid, Relief, and Economic Security Act [Member] | Maximum [Member] | CARES Act [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Qualifying deferment status percentage of loan portfolio | 1.00% | 1.00% | 1.00% |  | 1.00% |
PPP Loans [Member] | Small Business Administration [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
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 |  | $ 2,989,000 | $ 17,997,000 | $ 20,883,000 | $ 41,869,000 |
Loan processing fees |  | $ 2,989,000 | 5,047,000 |  |  |
PPP Loans [Member] | Small Business Administration [Member] | Coronavirus Aid, Relief, and Economic Security Act [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
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 | $ 41,869,000 | $ 2,989,000 | 17,997,000 | $ 20,883,000 |  |
Deferred loan processing fees not yet realized |  | $ 822,000 | 3,811,000 |  |  |
Amortization of loan processing fees description |  | being amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan. |  |  |  |
PPP Loans [Member] | Small Business Administration [Member] | Coronavirus Aid, Relief, and Economic Security Act [Member] | Interest and Fees on Loans and Leases [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Loan processing fees |  | $ 2,989,000 | $ 5,047,000 |  |  |
PPP Loans [Member] | Small Business Administration [Member] | Coronavirus Aid, Relief, and Economic Security Act [Member] | Minimum [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Percentage of processing fee per loan |  | 1.00% |  |  |  |
PPP Loans [Member] | Small Business Administration [Member] | Coronavirus Aid, Relief, and Economic Security Act [Member] | Maximum [Member] |  |  |  |  |  |
Unusual Risk Or Uncertainty [Line Items] |  |  |  |  |  |
Percentage of processing fee per loan |  | 5.00% |  |  |  |

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