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Allowance for Credit Losses - Schedule of Activity in the Allowance for Credit Losses by Loan Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | $ 447,941 | $ 427,175 | $ 436,603 | $ 427,265
Other adjustments | 180 | (19) | 184 | (50)
Charge-offs | (18,495) | (34,756) | (35,944) | (58,597)
Recoveries | 5,155 | 4,770 | 9,964 | 6,861
Provision for credit losses - Other | 22,282 |  | 46,256 |
Provision for credit losses | 22,300 | 39,899 | 46,300 | 61,590
Allowance for credit losses at period end | 457,063 | 437,069 | 457,063 | 437,069
Individually measured | 43,363 | 37,290 | 43,363 | 37,290
Collectively measured | 413,700 | 399,779 | 413,700 | 399,779
Individually measured | 143,486 | 118,286 | 143,486 | 118,286
Collectively measured | 50,761,309 | 44,421,411 | 50,761,309 | 44,421,411
Loans held at fair value | 136,884 | 135,834 | 136,884 | 135,834
Commercial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 201,183 | 166,518 | 175,837 | 169,604
Other adjustments | 0 | 0 | 0 | 0
Charge-offs | (6,148) | (9,584) | (15,870) | (20,799)
Recoveries | 1,746 | 950 | 2,675 | 1,429
Provision for credit losses - Other | (2,213) |  | 31,926 |
Provision for credit losses |  | 24,107 |  | 31,757
Allowance for credit losses at period end | 194,568 | 181,991 | 194,568 | 181,991
Individually measured | 35,129 | 30,927 | 35,129 | 30,927
Collectively measured | 159,439 | 151,064 | 159,439 | 151,064
Individually measured | 80,877 | 51,087 | 80,877 | 51,087
Collectively measured | 16,306,554 | 14,103,375 | 16,306,554 | 14,103,375
Loans held at fair value | 0 | 0 | 0 | 0
Commercial real estate |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 210,010 | 226,052 | 222,856 | 223,853
Other adjustments | 0 | 0 | 0 | 0
Charge-offs | (5,711) | (15,526) | (6,165) | (20,995)
Recoveries | 10 | 90 | 22 | 121
Provision for credit losses - Other | 20,049 |  | 7,645 |
Provision for credit losses |  | 13,112 |  | 20,749
Allowance for credit losses at period end | 224,358 | 223,728 | 224,358 | 223,728
Individually measured | 8,127 | 6,330 | 8,127 | 6,330
Collectively measured | 216,231 | 217,398 | 216,231 | 217,398
Individually measured | 32,828 | 48,289 | 32,828 | 48,289
Collectively measured | 13,259,182 | 11,898,908 | 13,259,182 | 11,898,908
Loans held at fair value | 0 | 0 | 0 | 0
Home Equity |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 9,139 | 7,191 | 8,943 | 7,116
Other adjustments | 0 | 0 | 0 | 0
Charge-offs | (111) | 0 | (111) | (74)
Recoveries | 30 | 35 | 246 | 64
Provision for credit losses - Other | 163 |  | 143 |
Provision for credit losses |  | 16 |  | 136
Allowance for credit losses at period end | 9,221 | 7,242 | 9,221 | 7,242
Individually measured | 0 | 0 | 0 | 0
Collectively measured | 9,221 | 7,242 | 9,221 | 7,242
Individually measured | 1,780 | 1,100 | 1,780 | 1,100
Collectively measured | 465,035 | 355,213 | 465,035 | 355,213
Loans held at fair value | 0 | 0 | 0 | 0
Residential Real Estate |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 10,652 | 13,701 | 10,335 | 13,133
Other adjustments | 0 | 0 | 0 | 0
Charge-offs | 0 | (23) | 0 | (61)
Recoveries | 2 | 8 | 138 | 10
Provision for credit losses - Other | 801 |  | 982 |
Provision for credit losses |  | (4,913) |  | (4,309)
Allowance for credit losses at period end | 11,455 | 8,773 | 11,455 | 8,773
Individually measured | 103 | 32 | 103 | 32
Collectively measured | 11,352 | 8,741 | 11,352 | 8,741
Individually measured | 27,960 | 17,807 | 27,960 | 17,807
Collectively measured | 3,783,938 | 2,913,694 | 3,783,938 | 2,913,694
Loans held at fair value | 136,884 | 135,834 | 136,884 | 135,834
Premium Finance Receivables |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 16,039 | 13,330 | 17,820 | 13,069
Other adjustments | 180 | (19) | 184 | (50)
Charge-offs | (6,346) | (9,486) | (13,472) | (16,424)
Recoveries | 3,335 | 3,663 | 6,822 | 5,190
Provision for credit losses - Other | 3,404 |  | 5,258 |
Provision for credit losses |  | 7,258 |  | 12,961
Allowance for credit losses at period end | 16,612 | 14,746 | 16,612 | 14,746
Individually measured | 0 | 0 | 0 | 0
Collectively measured | 16,612 | 14,746 | 16,612 | 14,746
Individually measured | 0 | 0 | 0 | 0
Collectively measured | 16,830,136 | 15,062,868 | 16,830,136 | 15,062,868
Loans held at fair value | 0 | 0 | 0 | 0
Consumer and Other |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance for credit losses at beginning of period | 918 | 383 | 812 | 490
Other adjustments | 0 | 0 | 0 | 0
Charge-offs | (179) | (137) | (326) | (244)
Recoveries | 32 | 24 | 61 | 47
Provision for credit losses - Other | 78 |  | 302 |
Provision for credit losses |  | 319 |  | 296
Allowance for credit losses at period end | 849 | 589 | 849 | 589
Individually measured | 4 | 1 | 4 | 1
Collectively measured | 845 | 588 | 845 | 588
Individually measured | 41 | 3 | 41 | 3
Collectively measured | 116,464 | 87,353 | 116,464 | 87,353
Loans held at fair value |  | $ 0 |  | $ 0

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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- Definition Amount of financing receivable collectively evaluated for credit loss. Excludes financing receivable individually evaluated for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.5.a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480418/310-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11C + Details
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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
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