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Allowance for Credit Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) loan | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | $ 7,040,894 | $ 6,999,990 |
Non - performing |  | 31,775 | 66,291 | $ 146,774
Number of modified loans | loan | 8 |  |  |
Modified loans | $ 28,800 |  |  |
Current |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 7,004,031 | 6,927,943 |
Total Past Due Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 36,863 | 72,047 |
30-59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 2,647 | 3,085 |
60-89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 2,441 | 2,671 |
Commercial Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 5,297,126 | 5,406,584 |
Commercial Loans | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 2,626,004 | 2,690,528 |
Non - performing |  | 15,022 | 31,488 | 101,070
Commercial Loans | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,479,586 | 1,513,523 |
Non - performing |  | 342 | 15,239 | 16,985
Commercial Loans | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 395,335 | 424,755 |
Non - performing |  | 864 | 2,471 | 384
Commercial Loans | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,160,790 | 1,135,693 |
Non - performing |  | 7,907 | 9,641 | 17,122
Commercial Loans | Current | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 2,610,642 | 2,659,040 |
Commercial Loans | Current | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,478,546 | 1,497,755 |
Commercial Loans | Current | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 394,471 | 421,834 |
Commercial Loans | Current | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,150,781 | 1,124,748 |
Commercial Loans | Total Past Due Loans | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 15,362 | 31,488 |
Commercial Loans | Total Past Due Loans | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,040 | 15,768 |
Commercial Loans | Total Past Due Loans | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 864 | 2,921 |
Commercial Loans | Total Past Due Loans | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 10,009 | 10,945 |
Commercial Loans | 30-59 Days Past Due | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 0 | 0 |
Commercial Loans | 30-59 Days Past Due | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 698 | 529 |
Commercial Loans | 30-59 Days Past Due | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 0 | 450 |
Commercial Loans | 30-59 Days Past Due | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 674 | 813 |
Commercial Loans | 60-89 Days Past Due | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 340 | 0 |
Commercial Loans | 60-89 Days Past Due | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 0 | 0 |
Commercial Loans | 60-89 Days Past Due | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 0 | 0 |
Commercial Loans | 60-89 Days Past Due | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,428 | 491 |
Consumer Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,743,768 | 1,593,406 |
Consumer Loans | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  |  | 357,900 |
Consumer Loans | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,259,252 | 1,127,585 |
Non - performing |  | 7,384 | 7,294 | 11,117
Consumer Loans | Other Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 119,927 | 107,906 |
Non - performing |  | 256 | 158 | $ 96
Consumer Loans | Current | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,250,221 | 1,117,074 |
Consumer Loans | Current | Other Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 119,370 | 107,492 |
Consumer Loans | Total Past Due Loans | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 9,031 | 10,511 |
Consumer Loans | Total Past Due Loans | Other Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 557 | 414 |
Consumer Loans | 30-59 Days Past Due | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 1,050 | 1,087 |
Consumer Loans | 30-59 Days Past Due | Other Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 225 | 206 |
Consumer Loans | 60-89 Days Past Due | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | 597 | 2,130 |
Consumer Loans | 60-89 Days Past Due | Other Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total |  | $ 76 | $ 50 |

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