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Allowance for Credit Losses (Allowance for Credit Losses Methodology) (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Feb. 28, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | $ 440,871 | $ 301,135
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  | 26,492
(Recapture) provision for credit losses for loans and leases | $ 88,400 | 17,476 | 106,498
Charge-offs |  | (49,753) | (20,269)
Recoveries |  | 5,750 | 3,608
Net recoveries (charge-offs) |  | (44,003) | (16,661)
Balance, end of period |  | 414,344 | 417,464
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 23,208 | 14,221
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  | 5,767
(Recapture) provision for credit losses on unfunded commitments |  | (340) | (959)
Balance, end of period |  | 22,868 | 19,029
Total allowance for credit losses |  | 437,212 | 436,493
Commercial real estate |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 125,888 | 77,813
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  | 8,736
(Recapture) provision for credit losses for loans and leases |  | 20,191 | 24,483
Charge-offs |  | (161) | 0
Recoveries |  | 358 | 58
Net recoveries (charge-offs) |  | 197 | 58
Balance, end of period |  | 146,276 | 111,090
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 11,170 | 7,207
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  | 2,257
(Recapture) provision for credit losses on unfunded commitments |  | 1,858 | (1,059)
Balance, end of period |  | 13,028 | 8,405
Total allowance for credit losses |  | 159,304 | 119,495
Commercial |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 244,821 | 167,135
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  | 17,204
(Recapture) provision for credit losses for loans and leases |  | 436 | 70,997
Charge-offs |  | (47,232) | (19,248)
Recoveries |  | 4,732 | 3,058
Net recoveries (charge-offs) |  | (42,500) | (16,190)
Balance, end of period |  | 202,757 | 239,146
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 7,841 | 3,049
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  | 3,066
(Recapture) provision for credit losses on unfunded commitments |  | (1,951) | 266
Balance, end of period |  | 5,890 | 6,381
Total allowance for credit losses |  | 208,647 | 245,527
Residential |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 62,004 | 50,329
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  | 454
(Recapture) provision for credit losses for loans and leases |  | (3,674) | 9,955
Charge-offs |  | (490) | (248)
Recoveries |  | 170 | 123
Net recoveries (charge-offs) |  | (320) | (125)
Balance, end of period |  | 58,010 | 60,613
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 2,940 | 3,196
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  | 268
(Recapture) provision for credit losses on unfunded commitments |  | (183) | (144)
Balance, end of period |  | 2,757 | 3,320
Total allowance for credit losses |  | 60,767 | 63,933
Consumer Portfolio Segment [Member] |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 8,158 | 5,858
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  | 98
(Recapture) provision for credit losses for loans and leases |  | 523 | 1,063
Charge-offs |  | (1,870) | (773)
Recoveries |  | 490 | 369
Net recoveries (charge-offs) |  | (1,380) | (404)
Balance, end of period |  | 7,301 | 6,615
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 1,257 | 769
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  | 176
(Recapture) provision for credit losses on unfunded commitments |  | (64) | (22)
Balance, end of period |  | 1,193 | 923
Total allowance for credit losses |  | $ 8,494 | $ 7,538

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