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Allowance for Credit Losses (Allowance for Credit Losses Methodology) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Feb. 28, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Allowance for credit losses on loans and leases |  |  |  |  |
Balance, beginning of period |  | $ 414,344 | $ 417,464 | $ 440,871 | $ 301,135
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  |  |  | 26,492
Provision for credit losses for loans and leases (1) | $ 88,400 | 34,760 | 15,216 | 52,236 | 121,714
Charge-offs |  | (36,201) | (33,478) | (85,954) | (53,747)
Recoveries |  | 5,768 | 5,401 | 11,518 | 9,009
Net charge-offs |  | (30,433) | (28,077) | (74,436) | (44,738)
Balance, end of period |  | 418,671 | 404,603 | 418,671 | 404,603
Reserve for unfunded commitments |  |  |  |  |
Balance, beginning of period |  | 22,868 | 19,029 | 23,208 | 14,221
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  |  |  | 5,767
Provision (recapture) for credit losses on unfunded commitments |  | (2,940) | 798 | (3,280) | (161)
Balance, end of period |  | 19,928 | 19,827 | 19,928 | 19,827
Total allowance for credit losses |  | 438,599 | 424,430 | 438,599 | 424,430
Commercial real estate |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |
Balance, beginning of period |  | 146,276 | 111,090 | 125,888 | 77,813
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  |  |  | 8,736
Provision for credit losses for loans and leases (1) |  | (3,096) | 7,829 | 17,095 | 32,312
Charge-offs |  | (585) | (174) | (746) | (174)
Recoveries |  | 551 | 209 | 909 | 267
Net charge-offs |  | (34) | 35 | 163 | 93
Balance, end of period |  | 143,146 | 118,954 | 143,146 | 118,954
Reserve for unfunded commitments |  |  |  |  |
Balance, beginning of period |  | 13,028 | 8,405 | 11,170 | 7,207
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  |  |  | 2,257
Provision (recapture) for credit losses on unfunded commitments |  | (3,082) | 1,595 | (1,224) | 536
Balance, end of period |  | 9,946 | 10,000 | 9,946 | 10,000
Total allowance for credit losses |  | 153,092 | 128,954 | 153,092 | 128,954
Commercial |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |
Balance, beginning of period |  | 202,757 | 239,146 | 244,821 | 167,135
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  |  |  | 17,204
Provision for credit losses for loans and leases (1) |  | 46,320 | 30 | 46,756 | 71,027
Charge-offs |  | (33,561) | (32,036) | (80,793) | (51,284)
Recoveries |  | 4,198 | 4,511 | 8,930 | 7,569
Net charge-offs |  | (29,363) | (27,525) | (71,863) | (43,715)
Balance, end of period |  | 219,714 | 211,651 | 219,714 | 211,651
Reserve for unfunded commitments |  |  |  |  |
Balance, beginning of period |  | 5,890 | 6,381 | 7,841 | 3,049
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  |  |  | 3,066
Provision (recapture) for credit losses on unfunded commitments |  | 657 | (560) | (1,294) | (294)
Balance, end of period |  | 6,547 | 5,821 | 6,547 | 5,821
Total allowance for credit losses |  | 226,261 | 217,472 | 226,261 | 217,472
Residential |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |
Balance, beginning of period |  | 58,010 | 60,613 | 62,004 | 50,329
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  |  |  | 454
Provision for credit losses for loans and leases (1) |  | (9,032) | 5,269 | (12,706) | 15,224
Charge-offs |  | (504) | (4) | (994) | (252)
Recoveries |  | 411 | 63 | 581 | 186
Net charge-offs |  | (93) | 59 | (413) | (66)
Balance, end of period |  | 48,885 | 65,941 | 48,885 | 65,941
Reserve for unfunded commitments |  |  |  |  |
Balance, beginning of period |  | 2,757 | 3,320 | 2,940 | 3,196
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  |  |  | 268
Provision (recapture) for credit losses on unfunded commitments |  | (479) | (302) | (662) | (446)
Balance, end of period |  | 2,278 | 3,018 | 2,278 | 3,018
Total allowance for credit losses |  | 51,163 | 68,959 | 51,163 | 68,959
Consumer Portfolio Segment [Member] |  |  |  |  |
Allowance for credit losses on loans and leases |  |  |  |  |
Balance, beginning of period |  | 7,301 | 6,615 | 8,158 | 5,858
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  |  |  |  | 98
Provision for credit losses for loans and leases (1) |  | 568 | 2,088 | 1,091 | 3,151
Charge-offs |  | (1,551) | (1,264) | (3,421) | (2,037)
Recoveries |  | 608 | 618 | 1,098 | 987
Net charge-offs |  | (943) | (646) | (2,323) | (1,050)
Balance, end of period |  | 6,926 | 8,057 | 6,926 | 8,057
Reserve for unfunded commitments |  |  |  |  |
Balance, beginning of period |  | 1,193 | 923 | 1,257 | 769
Off-Balance-Sheet, Credit Loss, Liability, acquired during the period |  |  |  |  | 176
Provision (recapture) for credit losses on unfunded commitments |  | (36) | 65 | (100) | 43
Balance, end of period |  | 1,157 | 988 | 1,157 | 988
Total allowance for credit losses |  | $ 8,083 | $ 9,045 | $ 8,083 | $ 9,045

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