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Allowance for Credit Losses (Allowance for Credit Losses Methodology) (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Feb. 28, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | $ 301,135 | $ 248,412
Initial ACL on PCD loans acquired during the period |  | 26,492 |
Provision for credit losses for loans and leases (1) | $ 88,400 | 209,979 | 83,605
Charge-offs |  | (116,974) | (44,989)
Recoveries |  | 20,239 | 14,107
Net (charge-offs) recoveries |  | (96,735) | (30,882)
Balance, end of period |  | 440,871 | 301,135
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 14,221 | 12,767
Initial ACL recorded for unfunded commitments acquired during the period |  | 5,767 |
Provision (recapture) for credit losses on unfunded commitments |  | 3,220 | 1,454
Balance, end of period |  | 23,208 | 14,221
Total allowance for credit losses |  | 464,079 | 315,356
Commercial Real Estate Portfolio Segment |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 77,813 | 99,075
Initial ACL on PCD loans acquired during the period |  | 8,736 |
Provision for credit losses for loans and leases (1) |  | 39,809 | (21,510)
Charge-offs |  | (803) | (136)
Recoveries |  | 333 | 384
Net (charge-offs) recoveries |  | (470) | 248
Balance, end of period |  | 125,888 | 77,813
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 7,207 | 8,461
Initial ACL recorded for unfunded commitments acquired during the period |  | 2,257 |
Provision (recapture) for credit losses on unfunded commitments |  | 1,706 | (1,254)
Balance, end of period |  | 11,170 | 7,207
Total allowance for credit losses |  | 137,058 | 85,020
Commercial Portfolio Segment |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 167,135 | 117,573
Initial ACL on PCD loans acquired during the period |  | 17,204 |
Provision for credit losses for loans and leases (1) |  | 153,460 | 79,606
Charge-offs |  | (109,862) | (41,073)
Recoveries |  | 16,884 | 11,029
Net (charge-offs) recoveries |  | (92,978) | (30,044)
Balance, end of period |  | 244,821 | 167,135
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 3,049 | 2,028
Initial ACL recorded for unfunded commitments acquired during the period |  | 3,066 |
Provision (recapture) for credit losses on unfunded commitments |  | 1,726 | 1,021
Balance, end of period |  | 7,841 | 3,049
Total allowance for credit losses |  | 252,662 | 170,184
Residential Portfolio Segment |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 50,329 | 29,068
Initial ACL on PCD loans acquired during the period |  | 454 |
Provision for credit losses for loans and leases (1) |  | 10,645 | 20,823
Charge-offs |  | (547) | (224)
Recoveries |  | 1,123 | 662
Net (charge-offs) recoveries |  | 576 | 438
Balance, end of period |  | 62,004 | 50,329
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 3,196 | 1,957
Initial ACL recorded for unfunded commitments acquired during the period |  | 268 |
Provision (recapture) for credit losses on unfunded commitments |  | (524) | 1,239
Balance, end of period |  | 2,940 | 3,196
Total allowance for credit losses |  | 64,944 | 53,525
Consumer Portfolio Segment |  |  |
Allowance for credit losses on loans and leases |  |  |
Balance, beginning of period |  | 5,858 | 2,696
Initial ACL on PCD loans acquired during the period |  | 98 |
Provision for credit losses for loans and leases (1) |  | 6,065 | 4,686
Charge-offs |  | (5,762) | (3,556)
Recoveries |  | 1,899 | 2,032
Net (charge-offs) recoveries |  | (3,863) | (1,524)
Balance, end of period |  | 8,158 | 5,858
Reserve for unfunded commitments |  |  |
Balance, beginning of period |  | 769 | 321
Initial ACL recorded for unfunded commitments acquired during the period |  | 176 |
Provision (recapture) for credit losses on unfunded commitments |  | 312 | 448
Balance, end of period |  | 1,257 | 769
Total allowance for credit losses |  | $ 9,415 | $ 6,627

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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (4) -Publisher SEC + Details
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