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Loans and Allowance for Credit Losses on Loans - Collateral dependent loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | $ 3,960,211 |  | $ 3,820,129 |  |  |
Less: allowance for credit losses on loans | 55,314 | $ 53,392 | 49,480 | $ 45,388 | $ 44,308 | $ 44,281
Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 53,012 |  | 50,478 |  |  |
Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 52,284 |  | 40,641 |  |  |
Accounts Receivable | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 91 |  | 5,915 |  |  |
Equipment | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 637 |  | 1,248 |  |  |
Other. | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI |  |  | 2,674 |  |  |
Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 14,435 |  | 10,744 |  |  |
Commercial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 11,532 | 11,511 | 11,968 | 14,114 | 12,576 | 11,751
Commercial | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 950 |  | 7,162 |  |  |
Commercial | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 859 |  | 883 |  |  |
Commercial | Accounts Receivable | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 91 |  | 5,915 |  |  |
Commercial | Other. | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI |  |  | 364 |  |  |
Commercial | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 20 |  | 569 |  |  |
Leases |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 2,690 | 2,766 | 2,865 | 1,736 | 2,573 | 3,480
Leases | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 637 |  | 1,248 |  |  |
Leases | Equipment | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 637 |  | 1,248 |  |  |
Leases | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 637 |  | 1,248 |  |  |
Commercial real estate - Investor |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 20,031 | 15,260 | 10,674 | 9,436 | 10,690 | 10,795
Commercial real estate - Investor | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 31,464 |  | 16,576 |  |  |
Commercial real estate - Investor | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 31,464 |  | 16,576 |  |  |
Commercial real estate - Investor | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 9,159 |  | 2,875 |  |  |
Commercial real estate - Owner occupied |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 12,562 | 15,576 | 15,001 | 11,478 | 8,139 | 4,913
Commercial real estate - Owner occupied | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 17,691 |  | 21,498 |  |  |
Commercial real estate - Owner occupied | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 17,691 |  | 19,188 |  |  |
Commercial real estate - Owner occupied | Other. | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI |  |  | 2,310 |  |  |
Commercial real estate - Owner occupied | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 4,586 |  | 5,808 |  |  |
Construction | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 116 |  |  |  |  |
Construction | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 116 |  |  |  |  |
Residential real estate - Investor |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 743 | 746 | 768 | 661 | 703 | 760
Residential real estate - Investor | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 38 |  | 675 |  |  |
Residential real estate - Investor | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 38 |  | 675 |  |  |
Residential real estate - Owner occupied |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 1,868 | 1,722 | 2,046 | 1,869 | 1,950 | 2,832
Residential real estate - Owner occupied | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 1,486 |  | 1,817 |  |  |
Residential real estate - Owner occupied | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 1,486 |  | 1,817 |  |  |
Residential real estate - Owner occupied | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans |  |  | 244 |  |  |
Multifamily |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 2,737 | 2,665 | 2,453 | 2,434 | 2,977 | 3,675
Multifamily | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 591 |  | 1,322 |  |  |
Multifamily | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 591 |  | 1,322 |  |  |
HELOC |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 1,694 | 1,788 | 1,806 | 1,542 | 1,675 | 2,510
HELOC | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 39 |  | 180 |  |  |
HELOC | Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans, including deferred loan loan costs and PCI | 39 |  | 180 |  |  |
HELOC | Collateral |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | 33 |  |  |  |  |
Other |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Less: allowance for credit losses on loans | $ 278 | $ 313 | $ 353 | $ 583 | $ 167 | $ 192

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