XML 61 R52.htm IDEA: XBRL DOCUMENT
v3.22.1

Allowance for Credit Losses (Loan Portfolio by Credit Quality Indicator) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 3,888,002 |  |
2021 | 8,840,780 |  |
2020 | 4,257,987 |  |
2019 | 3,229,287 |  |
2018 | 2,346,275 |  |
Prior | 8,442,094 |  |
Revolving | 4,266,869 |  |
Revolving to Term | 9,253 |  |
Total Loans | 35,280,547 | $ 34,789,104 | $ 33,171,233
Commercial, industrial and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 524,897 |  |
2021 | 2,797,844 |  |
2020 | 1,473,338 |  |
2019 | 980,153 |  |
2018 | 694,389 |  |
Prior | 1,102,645 |  |
Revolving | 3,748,163 |  |
Revolving to Term | 8,570 |  |
Total Loans | 11,329,999 |  |
Commercial PPP loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 213,948 |  |
2020 | 40,016 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 253,964 |  |
Construction and development |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 99,285 |  |
2021 | 391,570 |  |
2020 | 439,253 |  |
2019 | 235,541 |  |
2018 | 78,595 |  |
Prior | 129,758 |  |
Revolving | 22,404 |  |
Revolving to Term | 0 |  |
Total Loans | 1,396,406 |  |
Non-construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 468,125 |  |
2021 | 1,565,795 |  |
2020 | 1,113,854 |  |
2019 | 1,026,461 |  |
2018 | 778,923 |  |
Prior | 2,714,490 |  |
Revolving | 170,873 |  |
Revolving to Term | 147 |  |
Total Loans | 7,838,668 |  |
Home equity |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 107 |  |
2018 | 283 |  |
Prior | 16,535 |  |
Revolving | 303,974 |  |
Revolving to Term | 536 |  |
Total Loans | 321,435 | 335,155 | 390,253
Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 236,906 |  |
2021 | 838,278 |  |
2020 | 262,959 |  |
2019 | 152,228 |  |
2018 | 69,567 |  |
Prior | 240,047 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 1,799,985 | 1,637,099 | 1,421,973
Premium finance receivables - property and casualty |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 2,466,892 |  |
2021 | 2,442,973 |  |
2020 | 19,663 |  |
2019 | 7,203 |  |
2018 | 677 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 4,937,408 |  |
Premium finance receivables - life |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 91,374 |  |
2021 | 587,895 |  |
2020 | 908,193 |  |
2019 | 826,596 |  |
2018 | 722,851 |  |
Prior | 4,217,254 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 7,354,163 |  |
Consumer and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 523 |  |
2021 | 2,477 |  |
2020 | 711 |  |
2019 | 998 |  |
2018 | 990 |  |
Prior | 21,365 |  |
Revolving | 21,455 |  |
Revolving to Term | 0 |  |
Total Loans | 48,519 | $ 24,199 | $ 35,983
Early buy-out loans guaranteed by U.S. government agencies |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 241 |  |
2020 | 621 |  |
2019 | 5,920 |  |
2018 | 8,808 |  |
Prior | 34,506 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 50,096 |  |
Early buy-out loans guaranteed by U.S. government agencies | Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 241 |  |
2020 | 621 |  |
2019 | 5,920 |  |
2018 | 8,808 |  |
Prior | 34,506 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 50,096 |  |
Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 3,872,738 |  |
2021 | 8,713,279 |  |
2020 | 4,163,278 |  |
2019 | 3,062,306 |  |
2018 | 2,196,571 |  |
Prior | 8,077,175 |  |
Revolving | 4,129,622 |  |
Revolving to Term | 8,489 |  |
Total Loans | 34,223,458 |  |
Pass | Commercial, industrial and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 524,863 |  |
2021 | 2,714,254 |  |
2020 | 1,407,819 |  |
2019 | 889,866 |  |
2018 | 647,127 |  |
Prior | 1,037,167 |  |
Revolving | 3,616,144 |  |
Revolving to Term | 8,342 |  |
Total Loans | 10,845,582 |  |
Pass | Commercial PPP loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 213,790 |  |
2020 | 33,830 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 247,620 |  |
Pass | Construction and development |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 99,285 |  |
2021 | 391,288 |  |
2020 | 430,778 |  |
2019 | 231,618 |  |
2018 | 51,795 |  |
Prior | 114,022 |  |
Revolving | 22,404 |  |
Revolving to Term | 0 |  |
Total Loans | 1,341,190 |  |
Pass | Non-construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 468,125 |  |
2021 | 1,563,953 |  |
2020 | 1,103,776 |  |
2019 | 962,675 |  |
2018 | 715,014 |  |
Prior | 2,500,006 |  |
Revolving | 170,873 |  |
Revolving to Term | 147 |  |
Total Loans | 7,484,569 |  |
Pass | Home equity |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 5,502 |  |
Revolving | 298,765 |  |
Revolving to Term | 0 |  |
Total Loans | 304,267 |  |
Pass | Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 236,643 |  |
2021 | 835,324 |  |
2020 | 259,100 |  |
2019 | 143,358 |  |
2018 | 58,132 |  |
Prior | 189,137 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 1,721,694 |  |
Pass | Premium finance receivables - property and casualty |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 2,451,925 |  |
2021 | 2,404,905 |  |
2020 | 19,074 |  |
2019 | 7,203 |  |
2018 | 662 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 4,883,769 |  |
Pass | Premium finance receivables - life |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 91,374 |  |
2021 | 587,300 |  |
2020 | 908,193 |  |
2019 | 826,596 |  |
2018 | 722,851 |  |
Prior | 4,210,182 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 7,346,496 |  |
Pass | Consumer and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 523 |  |
2021 | 2,465 |  |
2020 | 708 |  |
2019 | 990 |  |
2018 | 990 |  |
Prior | 21,159 |  |
Revolving | 21,436 |  |
Revolving to Term | 0 |  |
Total Loans | 48,271 |  |
Special mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 14,891 |  |
2021 | 106,049 |  |
2020 | 75,929 |  |
2019 | 114,763 |  |
2018 | 84,161 |  |
Prior | 190,738 |  |
Revolving | 109,483 |  |
Revolving to Term | 228 |  |
Total Loans | 696,242 |  |
Special mention | Commercial, industrial and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 34 |  |
2021 | 77,940 |  |
2020 | 51,807 |  |
2019 | 61,656 |  |
2018 | 21,183 |  |
Prior | 48,902 |  |
Revolving | 105,022 |  |
Revolving to Term | 228 |  |
Total Loans | 366,772 |  |
Special mention | Commercial PPP loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 158 |  |
2020 | 5,621 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 5,779 |  |
Special mention | Construction and development |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 282 |  |
2020 | 8,475 |  |
2019 | 3,611 |  |
2018 | 24,748 |  |
Prior | 110 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 37,226 |  |
Special mention | Non-construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 1,842 |  |
2020 | 9,792 |  |
2019 | 49,110 |  |
2018 | 36,694 |  |
Prior | 129,238 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 226,676 |  |
Special mention | Home equity |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 240 |  |
Prior | 391 |  |
Revolving | 4,452 |  |
Revolving to Term | 0 |  |
Total Loans | 5,083 |  |
Special mention | Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 1,612 |  |
2020 | 173 |  |
2019 | 378 |  |
2018 | 1,296 |  |
Prior | 4,899 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 8,358 |  |
Special mention | Premium finance receivables - property and casualty |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 14,857 |  |
2021 | 23,617 |  |
2020 | 59 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 38,533 |  |
Special mention | Premium finance receivables - life |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 595 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 7,072 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 7,667 |  |
Special mention | Consumer and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 3 |  |
2020 | 2 |  |
2019 | 8 |  |
2018 | 0 |  |
Prior | 126 |  |
Revolving | 9 |  |
Revolving to Term | 0 |  |
Total Loans | 148 |  |
Substandard accrual |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 284 |  |
2021 | 15,042 |  |
2020 | 13,348 |  |
2019 | 37,861 |  |
2018 | 54,236 |  |
Prior | 116,853 |  |
Revolving | 27,692 |  |
Revolving to Term | 536 |  |
Total Loans | 265,852 |  |
Substandard accrual | Commercial, industrial and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 5,596 |  |
2020 | 10,285 |  |
2019 | 22,157 |  |
2018 | 24,320 |  |
Prior | 11,484 |  |
Revolving | 26,925 |  |
Revolving to Term | 0 |  |
Total Loans | 100,767 |  |
Substandard accrual | Commercial PPP loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 565 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 565 |  |
Substandard accrual | Construction and development |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 312 |  |
2018 | 2,052 |  |
Prior | 14,572 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 16,936 |  |
Substandard accrual | Non-construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 286 |  |
2019 | 14,676 |  |
2018 | 26,945 |  |
Prior | 74,269 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 116,176 |  |
Substandard accrual | Home equity |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 9,045 |  |
Revolving | 757 |  |
Revolving to Term | 536 |  |
Total Loans | 10,338 |  |
Substandard accrual | Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 263 |  |
2021 | 1,101 |  |
2020 | 2,184 |  |
2019 | 716 |  |
2018 | 904 |  |
Prior | 7,407 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 12,575 |  |
Substandard accrual | Premium finance receivables - property and casualty |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 21 |  |
2021 | 8,336 |  |
2020 | 27 |  |
2019 | 0 |  |
2018 | 15 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 8,399 |  |
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 | 0 |  |
2021 | 9 |  |
2020 | 1 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 76 |  |
Revolving | 10 |  |
Revolving to Term | 0 |  |
Total Loans | 96 |  |
Substandard nonaccrual/doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 89 |  |
2021 | 6,169 |  |
2020 | 4,811 |  |
2019 | 8,437 |  |
2018 | 2,499 |  |
Prior | 22,822 |  |
Revolving | 72 |  |
Revolving to Term | 0 |  |
Total Loans | 44,899 |  |
Substandard nonaccrual/doubtful | Commercial, industrial and other |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 54 |  |
2020 | 3,427 |  |
2019 | 6,474 |  |
2018 | 1,759 |  |
Prior | 5,092 |  |
Revolving | 72 |  |
Revolving to Term | 0 |  |
Total Loans | 16,878 |  |
Substandard nonaccrual/doubtful | Commercial PPP loans |  |  |
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 | Construction and development |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 1,054 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 1,054 |  |
Substandard nonaccrual/doubtful | Non-construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 270 |  |
Prior | 10,977 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 11,247 |  |
Substandard nonaccrual/doubtful | Home equity |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 107 |  |
2018 | 43 |  |
Prior | 1,597 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 1,747 |  |
Substandard nonaccrual/doubtful | Residential real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 881 |  |
2019 | 1,856 |  |
2018 | 427 |  |
Prior | 4,098 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 7,262 |  |
Substandard nonaccrual/doubtful | Premium finance receivables - property and casualty |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 89 |  |
2021 | 6,115 |  |
2020 | 503 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 0 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | 6,707 |  |
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 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 4 |  |
Revolving | 0 |  |
Revolving to Term | 0 |  |
Total Loans | $ 4 |  |

X
- Definition Amount excluding accrued interest, before allowance for credit loss, of financing receivable. + 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 http://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 http://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 http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated more than five years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of revolving financing receivable converted to term loan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120270059-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated four years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated three years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated two years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_CommercialIndustrialAndOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_PaycheckProtectionProgramLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_ConstructionAndDevelopmentPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_NonConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_HomeEquityPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_PremiumPropertyAndCasualtyInsurancePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_PremiumLifeInsurancePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=wtfc_ConsumerAndOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=wtfc_EarlyBuyOutLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |