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Loans and the Allowance for Credit Losses (Details) - Past Due Financing Receivables - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | $ 80,535 | $ 84,625
Nonaccrual | 59,403 | 61,700
Gross Loans | 6,987,973 | 6,838,351
30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 8,752 | 7,364
60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 2,030
90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 12,380 | 13,531
Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 6,907,438 | 6,753,726
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 38,322 | 39,553
Nonaccrual | 30,341 | 30,062
Gross Loans | 1,278,477 | 1,299,428
Commercial Portfolio Segment [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 3,561 | 4,305
Commercial Portfolio Segment [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 729
Commercial Portfolio Segment [Member] | 90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 4,420 | 4,457
Commercial Portfolio Segment [Member] | Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 1,240,155 | 1,259,875
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 35,262 | 33,959
Nonaccrual | 26,316 | 25,393
Gross Loans | 4,919,093 | 4,741,590
Commercial Real Estate Portfolio Segment [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 3,098 | 1,622
Commercial Real Estate Portfolio Segment [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 1,009
Commercial Real Estate Portfolio Segment [Member] | 90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 5,848 | 5,935
Commercial Real Estate Portfolio Segment [Member] | Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 4,883,831 | 4,707,631
Commercial Construction Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 123 | 3,150
Nonaccrual |  | 3,150
Gross Loans | 539,058 | 540,178
Commercial Construction Portfolio Segment [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 123 |
Commercial Construction Portfolio Segment [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
Commercial Construction Portfolio Segment [Member] | 90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
Commercial Construction Portfolio Segment [Member] | Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 538,935 | 537,028
Residential Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 6,203 | 7,963
Nonaccrual | 2,746 | 3,095
Gross Loans | 250,205 | 255,269
Residential Real Estate Portfolio Segment [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 1,970 | 1,437
Residential Real Estate Portfolio Segment [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  | 292
Residential Real Estate Portfolio Segment [Member] | 90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 1,487 | 3,139
Residential Real Estate Portfolio Segment [Member] | Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 244,002 | 247,306
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 625 |
Nonaccrual |  |
Gross Loans | 1,140 | 1,886
Consumer Portfolio Segment [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
Consumer Portfolio Segment [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual |  |
Consumer Portfolio Segment [Member] | 90 Days or Greater Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | 625 |
Consumer Portfolio Segment [Member] | Current [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Nonaccrual | $ 515 | $ 1,886

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