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Allowance for Credit Losses (Loan Portfolio by Credit Quality Indicator) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | $ 12,179,209 |
2021 | 6,132,815 |
2020 | 3,744,770 |
2019 | 2,807,417 |
2018 | 2,001,722 |
Prior | 7,592,801 |
Revolving | 4,672,976 |
Revolving to Term | 64,775 |
Total Loans | 39,196,485 | $ 34,789,104
Commercial, industrial and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 2,761,735 |
2021 | 2,433,733 |
2020 | 1,103,489 |
2019 | 701,788 |
2018 | 503,047 |
Prior | 869,920 |
Revolving | 4,131,511 |
Revolving to Term | 43,941 |
Total Loans | 12,549,164 |
Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 415,454 |
2021 | 470,679 |
2020 | 283,869 |
2019 | 148,130 |
2018 | 53,469 |
Prior | 103,329 |
Revolving | 12,000 |
Revolving to Term | 0 |
Total Loans | 1,486,930 |
Non-construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 1,913,542 |
2021 | 1,543,368 |
2020 | 1,052,539 |
2019 | 877,773 |
2018 | 644,796 |
Prior | 2,231,113 |
Revolving | 181,096 |
Revolving to Term | 19,790 |
Total Loans | 8,464,017 |
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 198 |
2021 | 1 |
2020 | 118 |
2019 | 74 |
2018 | 255 |
Prior | 15,217 |
Revolving | 315,791 |
Revolving to Term | 1,044 |
Total Loans | 332,698 | 335,155
Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 792,501 |
2021 | 840,690 |
2020 | 242,347 |
2019 | 146,185 |
2018 | 73,004 |
Prior | 277,656 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 2,372,383 | 1,637,099
Premium finance receivables - property & casualty |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 5,782,156 |
2021 | 58,687 |
2020 | 6,909 |
2019 | 1,707 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 5,849,459 |
Premium finance receivables - life |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 510,675 |
2021 | 784,056 |
2020 | 1,055,247 |
2019 | 931,276 |
2018 | 726,763 |
Prior | 4,082,981 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 8,090,998 |
Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 2,948 |
2021 | 1,601 |
2020 | 252 |
2019 | 484 |
2018 | 388 |
Prior | 12,585 |
Revolving | 32,578 |
Revolving to Term | 0 |
Total Loans | 50,836 | $ 24,199
Early buy-out loans guaranteed by U.S. government agencies |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 901 |
2020 | 9,424 |
2019 | 21,662 |
2018 | 19,700 |
Prior | 113,101 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 164,788 |
Early buy-out loans guaranteed by U.S. government agencies | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 901 |
2020 | 9,424 |
2019 | 21,662 |
2018 | 19,700 |
Prior | 113,101 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 164,788 |
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 12,046,682 |
2021 | 5,986,991 |
2020 | 3,662,460 |
2019 | 2,661,645 |
2018 | 1,863,618 |
Prior | 7,336,246 |
Revolving | 4,537,246 |
Revolving to Term | 62,489 |
Total Loans | 38,157,377 |
Pass | Commercial, industrial and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 2,740,821 |
2021 | 2,314,421 |
2020 | 1,064,680 |
2019 | 631,670 |
2018 | 460,898 |
Prior | 847,955 |
Revolving | 3,999,401 |
Revolving to Term | 42,699 |
Total Loans | 12,102,545 |
Pass | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 413,322 |
2021 | 470,162 |
2020 | 261,173 |
2019 | 124,818 |
2018 | 36,591 |
Prior | 90,294 |
Revolving | 12,000 |
Revolving to Term | 0 |
Total Loans | 1,408,360 |
Pass | Non-construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 1,908,428 |
2021 | 1,530,812 |
2020 | 1,045,330 |
2019 | 851,041 |
2018 | 589,268 |
Prior | 2,149,357 |
Revolving | 181,096 |
Revolving to Term | 19,790 |
Total Loans | 8,275,122 |
Pass | Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 198 |
2021 | 0 |
2020 | 0 |
2019 | 56 |
2018 | 0 |
Prior | 5,445 |
Revolving | 312,183 |
Revolving to Term | 0 |
Total Loans | 317,882 |
Pass | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 787,652 |
2021 | 835,672 |
2020 | 228,945 |
2019 | 120,596 |
2018 | 49,710 |
Prior | 150,024 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 2,172,599 |
Pass | Premium finance receivables - property & casualty |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 5,682,665 |
2021 | 55,275 |
2020 | 6,833 |
2019 | 1,707 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 5,746,480 |
Pass | Premium finance receivables - life |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 510,675 |
2021 | 779,057 |
2020 | 1,055,247 |
2019 | 931,276 |
2018 | 726,763 |
Prior | 4,080,764 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 8,083,782 |
Pass | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 2,921 |
2021 | 1,592 |
2020 | 252 |
2019 | 481 |
2018 | 388 |
Prior | 12,407 |
Revolving | 32,566 |
Revolving to Term | 0 |
Total Loans | 50,607 |
Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 100,155 |
2021 | 91,520 |
2020 | 33,122 |
2019 | 70,675 |
2018 | 87,653 |
Prior | 67,880 |
Revolving | 88,414 |
Revolving to Term | 1,380 |
Total Loans | 540,799 |
Special mention | Commercial, industrial and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 6,780 |
2021 | 71,263 |
2020 | 10,279 |
2019 | 27,533 |
2018 | 36,874 |
Prior | 17,972 |
Revolving | 85,813 |
Revolving to Term | 1,232 |
Total Loans | 257,746 |
Special mention | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 517 |
2020 | 14,341 |
2019 | 23,312 |
2018 | 16,778 |
Prior | 82 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 55,030 |
Special mention | Non-construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 5,114 |
2021 | 12,556 |
2020 | 6,377 |
2019 | 18,225 |
2018 | 31,849 |
Prior | 41,236 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 115,357 |
Special mention | Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 1 |
2020 | 0 |
2019 | 0 |
2018 | 255 |
Prior | 991 |
Revolving | 2,598 |
Revolving to Term | 148 |
Total Loans | 3,993 |
Special mention | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 3,523 |
2021 | 1,720 |
2020 | 2,100 |
2019 | 1,602 |
2018 | 1,897 |
Prior | 5,247 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 16,089 |
Special mention | Premium finance receivables - property & casualty |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 84,728 |
2021 | 462 |
2020 | 25 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 85,215 |
Special mention | Premium finance receivables - life |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 4,999 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 2,217 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 7,216 |
Special mention | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 10 |
2021 | 2 |
2020 | 0 |
2019 | 3 |
2018 | 0 |
Prior | 135 |
Revolving | 3 |
Revolving to Term | 0 |
Total Loans | 153 |
Substandard accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 20,888 |
2021 | 44,402 |
2020 | 36,550 |
2019 | 25,760 |
2018 | 28,936 |
Prior | 61,763 |
Revolving | 47,216 |
Revolving to Term | 906 |
Total Loans | 266,421 |
Substandard accrual | Commercial, industrial and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 13,560 |
2021 | 42,091 |
2020 | 26,252 |
2019 | 17,104 |
2018 | 5,078 |
Prior | 2,902 |
Revolving | 46,297 |
Revolving to Term | 10 |
Total Loans | 153,294 |
Substandard accrual | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 2,132 |
2021 | 0 |
2020 | 8,355 |
2019 | 0 |
2018 | 100 |
Prior | 12,537 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 23,124 |
Substandard accrual | Non-construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 832 |
2019 | 8,507 |
2018 | 23,330 |
Prior | 34,898 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 67,567 |
Substandard accrual | Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 7,530 |
Revolving | 910 |
Revolving to Term | 896 |
Total Loans | 9,336 |
Substandard accrual | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 1,214 |
2021 | 1,981 |
2020 | 1,111 |
2019 | 149 |
2018 | 428 |
Prior | 3,853 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 8,736 |
Substandard accrual | Premium finance receivables - property & casualty |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 3,965 |
2021 | 329 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 4,294 |
Substandard accrual | Premium finance receivables - life |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 0 |
Substandard accrual | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 17 |
2021 | 1 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 43 |
Revolving | 9 |
Revolving to Term | 0 |
Total Loans | 70 |
Substandard nonaccrual/doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 11,484 |
2021 | 9,001 |
2020 | 3,214 |
2019 | 27,675 |
2018 | 1,815 |
Prior | 13,811 |
Revolving | 100 |
Revolving to Term | 0 |
Total Loans | 67,100 |
Substandard nonaccrual/doubtful | Commercial, industrial and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 574 |
2021 | 5,958 |
2020 | 2,278 |
2019 | 25,481 |
2018 | 197 |
Prior | 1,091 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 35,579 |
Substandard nonaccrual/doubtful | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 416 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 416 |
Substandard nonaccrual/doubtful | Non-construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
2018 | 349 |
Prior | 5,622 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 5,971 |
Substandard nonaccrual/doubtful | Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 118 |
2019 | 18 |
2018 | 0 |
Prior | 1,251 |
Revolving | 100 |
Revolving to Term | 0 |
Total Loans | 1,487 |
Substandard nonaccrual/doubtful | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 112 |
2021 | 416 |
2020 | 767 |
2019 | 2,176 |
2018 | 1,269 |
Prior | 5,431 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 10,171 |
Substandard nonaccrual/doubtful | Premium finance receivables - property & casualty |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 10,798 |
2021 | 2,621 |
2020 | 51 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 13,470 |
Substandard nonaccrual/doubtful | Premium finance receivables - life |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | 0 |
Substandard nonaccrual/doubtful | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 | 0 |
2021 | 6 |
2020 | 0 |
2019 | 0 |
2018 | 0 |
Prior | 0 |
Revolving | 0 |
Revolving to Term | 0 |
Total Loans | $ 6 |

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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