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Loans Loans - Non-Accrual Loans, Segregated by Class of Loans and Year of Origination (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Non-accrual loans | $ 48,966 | $ 53,713
Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 8,885 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 4,980 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 10,148 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 3,083 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 4,355 |
Financing Receivable, Revolving | 8,035 |
Financing Receivable, Revolving, Converted to Term Loan | 9,480 |
Commercial Portfolio Segment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 844,354 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 953,664 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 616,642 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 331,729 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 189,719 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 255,999 |
Financing Receivable, Revolving | 2,331,781 |
Non-accrual loans | 16,693 | 22,582
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 478 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 4,101 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 3,910 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 1,552 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 1,033 |
Financing Receivable, Revolving | 2,038 |
Financing Receivable, Revolving, Converted to Term Loan | 3,581 |
Commercial and Industrial Total Energy Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 289,573 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 125,803 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 8,629 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 18,726 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 6,603 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 5,843 |
Financing Receivable, Revolving | 521,322 |
Non-accrual loans | 12,271 | 14,433
Commercial and Industrial Total Energy Loans [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 0 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 5,039 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 1,137 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 0 |
Financing Receivable, Revolving | 5,997 |
Financing Receivable, Revolving, Converted to Term Loan | 98 |
Paycheck Protection Program [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Non-accrual loans | 0 | 0
Paycheck Protection Program [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 0 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 0 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, Revolving, Converted to Term Loan | 0 |
Commercial Real Estate Buildings Land And Other Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 660,171 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 1,606,760 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 1,231,072 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 938,002 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 553,657 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 1,200,107 |
Financing Receivable, Revolving | 81,435 |
Non-accrual loans | 19,003 | 15,297
Commercial Real Estate Buildings Land And Other Loans [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 8,407 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 296 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 1,199 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 394 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 2,932 |
Financing Receivable, Revolving | 0 |
Financing Receivable, Revolving, Converted to Term Loan | 5,775 |
Construction Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 202,584 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 662,966 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 201,069 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 141,510 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 636 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 2,265 |
Financing Receivable, Revolving | 207,182 |
Non-accrual loans | 583 | 948
Construction Loans [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 583 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 0 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, Revolving, Converted to Term Loan | 0 |
Total consumer real estate loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Non-accrual loans | 416 | 440
Total consumer real estate loans [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 0 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 0 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 390 |
Financing Receivable, Revolving | 0 |
Financing Receivable, Revolving, Converted to Term Loan | 26 |
Consumer Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Non-accrual loans | 0 | $ 13
Consumer Loan [Member] | Nonperforming Financial Instruments [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year | 0 |
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year | 0 |
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year | 0 |
Financing Receivable, Originated, More than Five Years before Current Fiscal Year | 0 |
Financing Receivable, Revolving | 0 |
Financing Receivable, Revolving, Converted to Term Loan | $ 0 |

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