Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001015328-24-000083-index-headers.html | 2024-02-28 17:20:42 | |
| 0001015328-24-000083-index.html | 2024-02-28 17:20:42 | |
| 0001015328-24-000083.txt | 2024-02-28 17:20:42 | |
 0001015328-24-000083-xbrl.zip | 963742 | 2024-02-28 17:20:42 |
| exhibit211subsidiaries1231.htm | 28379 | 2024-02-28 17:20:42 |
| exhibit231consentofindepen.htm | 3528 | 2024-02-28 17:20:42 |
| exhibit311executivesignoff.htm | 10684 | 2024-02-28 17:20:42 |
| exhibit312executivesignoff.htm | 10570 | 2024-02-28 17:20:42 |
| exhibit321sox1231234q23.htm | 7859 | 2024-02-28 17:20:42 |
| exhibit41registrantsecurit.htm | 44371 | 2024-02-28 17:20:42 |
| exhibit971policyonrecoupme.htm | 20743 | 2024-02-28 17:20:42 |
| FilingSummary.xml | 87034 | 2024-02-28 17:20:42 |
| Financial_Report.xlsx | 323054 | 2024-02-28 17:20:42 |
| MetaLinks.json | 1970452 | 2024-02-28 17:20:42 |
| R1.htm | 72692 | 2024-02-28 17:20:42 |
| R10.htm | 75824 | 2024-02-28 17:20:42 |
| R100.htm | 36584 | 2024-02-28 17:20:42 |
| R101.htm | 43787 | 2024-02-28 17:20:42 |
| R102.htm | 7762 | 2024-02-28 17:20:42 |
| R103.htm | 16299 | 2024-02-28 17:20:42 |
| R104.htm | 29896 | 2024-02-28 17:20:42 |
| R105.htm | 15629 | 2024-02-28 17:20:42 |
| R106.htm | 31805 | 2024-02-28 17:20:42 |
| R107.htm | 42401 | 2024-02-28 17:20:42 |
| R108.htm | 104583 | 2024-02-28 17:20:42 |
| R109.htm | 45402 | 2024-02-28 17:20:42 |
| R11.htm | 19184 | 2024-02-28 17:20:42 |
| R110.htm | 42477 | 2024-02-28 17:20:42 |
| R111.htm | 24818 | 2024-02-28 17:20:42 |
| R112.htm | 10090 | 2024-02-28 17:20:42 |
| R113.htm | 149550 | 2024-02-28 17:20:42 |
| R114.htm | 29039 | 2024-02-28 17:20:42 |
| R115.htm | 32127 | 2024-02-28 17:20:42 |
| R116.htm | 65085 | 2024-02-28 17:20:42 |
| R117.htm | 65811 | 2024-02-28 17:20:42 |
| R118.htm | 12151 | 2024-02-28 17:20:42 |
| R119.htm | 21474 | 2024-02-28 17:20:42 |
| R12.htm | 253309 | 2024-02-28 17:20:42 |
| R120.htm | 20187 | 2024-02-28 17:20:42 |
| R121.htm | 52979 | 2024-02-28 17:20:42 |
| R122.htm | 122970 | 2024-02-28 17:20:42 |
| R123.htm | 87733 | 2024-02-28 17:20:42 |
| R124.htm | 42123 | 2024-02-28 17:20:42 |
| R125.htm | 27511 | 2024-02-28 17:20:42 |
| R126.htm | 101338 | 2024-02-28 17:20:42 |
| R127.htm | 79815 | 2024-02-28 17:20:42 |
| R128.htm | 21669 | 2024-02-28 17:20:42 |
| R129.htm | 49684 | 2024-02-28 17:20:42 |
| R13.htm | 33500 | 2024-02-28 17:20:42 |
| R130.htm | 35562 | 2024-02-28 17:20:42 |
| R131.htm | 38587 | 2024-02-28 17:20:42 |
| R132.htm | 8069 | 2024-02-28 17:20:42 |
| R133.htm | 58391 | 2024-02-28 17:20:42 |
| R134.htm | 53364 | 2024-02-28 17:20:42 |
| R135.htm | 55513 | 2024-02-28 17:20:42 |
| R136.htm | 75819 | 2024-02-28 17:20:42 |
| R137.htm | 45780 | 2024-02-28 17:20:42 |
| R14.htm | 825915 | 2024-02-28 17:20:42 |
| R15.htm | 34472 | 2024-02-28 17:20:42 |
| R16.htm | 5351 | 2024-02-28 17:20:42 |
| R17.htm | 59551 | 2024-02-28 17:20:42 |
| R18.htm | 18483 | 2024-02-28 17:20:42 |
| R19.htm | 48881 | 2024-02-28 17:20:42 |
| R2.htm | 7803 | 2024-02-28 17:20:42 |
| R20.htm | 29088 | 2024-02-28 17:20:42 |
| R21.htm | 5827 | 2024-02-28 17:20:42 |
| R22.htm | 34962 | 2024-02-28 17:20:42 |
| R23.htm | 65891 | 2024-02-28 17:20:42 |
| R24.htm | 67129 | 2024-02-28 17:20:42 |
| R25.htm | 158440 | 2024-02-28 17:20:42 |
| R26.htm | 94472 | 2024-02-28 17:20:42 |
| R27.htm | 123642 | 2024-02-28 17:20:42 |
| R28.htm | 297205 | 2024-02-28 17:20:42 |
| R29.htm | 19631 | 2024-02-28 17:20:42 |
| R3.htm | 119128 | 2024-02-28 17:20:42 |
| R30.htm | 159319 | 2024-02-28 17:20:42 |
| R31.htm | 298472 | 2024-02-28 17:20:42 |
| R32.htm | 106934 | 2024-02-28 17:20:42 |
| R33.htm | 92548 | 2024-02-28 17:20:42 |
| R34.htm | 110974 | 2024-02-28 17:20:42 |
| R35.htm | 30797 | 2024-02-28 17:20:42 |
| R36.htm | 15211 | 2024-02-28 17:20:42 |
| R37.htm | 8482 | 2024-02-28 17:20:42 |
| R38.htm | 136435 | 2024-02-28 17:20:42 |
| R39.htm | 253374 | 2024-02-28 17:20:42 |
| R4.htm | 29683 | 2024-02-28 17:20:42 |
| R40.htm | 30098 | 2024-02-28 17:20:42 |
| R41.htm | 801359 | 2024-02-28 17:20:42 |
| R42.htm | 25414 | 2024-02-28 17:20:42 |
| R43.htm | 94150 | 2024-02-28 17:20:42 |
| R44.htm | 17351 | 2024-02-28 17:20:42 |
| R45.htm | 49824 | 2024-02-28 17:20:42 |
| R46.htm | 25999 | 2024-02-28 17:20:42 |
| R47.htm | 22335 | 2024-02-28 17:20:42 |
| R48.htm | 60466 | 2024-02-28 17:20:42 |
| R49.htm | 56008 | 2024-02-28 17:20:42 |
| R5.htm | 139585 | 2024-02-28 17:20:42 |
| R50.htm | 69560 | 2024-02-28 17:20:42 |
| R51.htm | 92663 | 2024-02-28 17:20:42 |
| R52.htm | 106865 | 2024-02-28 17:20:42 |
| R53.htm | 292252 | 2024-02-28 17:20:42 |
| R54.htm | 167460 | 2024-02-28 17:20:42 |
| R55.htm | 277203 | 2024-02-28 17:20:42 |
| R56.htm | 104900 | 2024-02-28 17:20:42 |
| R57.htm | 86496 | 2024-02-28 17:20:42 |
| R58.htm | 114171 | 2024-02-28 17:20:42 |
| R59.htm | 29866 | 2024-02-28 17:20:42 |
| R6.htm | 72489 | 2024-02-28 17:20:42 |
| R60.htm | 40279 | 2024-02-28 17:20:42 |
| R61.htm | 75362 | 2024-02-28 17:20:42 |
| R62.htm | 25265 | 2024-02-28 17:20:42 |
| R63.htm | 54201 | 2024-02-28 17:20:42 |
| R64.htm | 28299 | 2024-02-28 17:20:42 |
| R65.htm | 68256 | 2024-02-28 17:20:42 |
| R66.htm | 25204 | 2024-02-28 17:20:42 |
| R67.htm | 18856 | 2024-02-28 17:20:42 |
| R68.htm | 44894 | 2024-02-28 17:20:42 |
| R69.htm | 95484 | 2024-02-28 17:20:42 |
| R7.htm | 91313 | 2024-02-28 17:20:42 |
| R70.htm | 268379 | 2024-02-28 17:20:42 |
| R71.htm | 82600 | 2024-02-28 17:20:42 |
| R72.htm | 16535 | 2024-02-28 17:20:42 |
| R73.htm | 99429 | 2024-02-28 17:20:42 |
| R74.htm | 62637 | 2024-02-28 17:20:42 |
| R75.htm | 29235 | 2024-02-28 17:20:42 |
| R76.htm | 52344 | 2024-02-28 17:20:42 |
| R77.htm | 27492 | 2024-02-28 17:20:42 |
| R78.htm | 22244 | 2024-02-28 17:20:42 |
| R79.htm | 10944 | 2024-02-28 17:20:42 |
| R8.htm | 7946 | 2024-02-28 17:20:42 |
| R80.htm | 22658 | 2024-02-28 17:20:42 |
| R81.htm | 27688 | 2024-02-28 17:20:42 |
| R82.htm | 30114 | 2024-02-28 17:20:42 |
| R83.htm | 13165 | 2024-02-28 17:20:42 |
| R84.htm | 22163 | 2024-02-28 17:20:42 |
| R85.htm | 29337 | 2024-02-28 17:20:42 |
| R86.htm | 16660 | 2024-02-28 17:20:42 |
| R87.htm | 14464 | 2024-02-28 17:20:42 |
| R88.htm | 41552 | 2024-02-28 17:20:42 |
| R89.htm | 13491 | 2024-02-28 17:20:42 |
| R9.htm | 154134 | 2024-02-28 17:20:42 |
| R90.htm | 33562 | 2024-02-28 17:20:42 |
| R91.htm | 14715 | 2024-02-28 17:20:42 |
| R92.htm | 81317 | 2024-02-28 17:20:42 |
| R93.htm | 21965 | 2024-02-28 17:20:42 |
| R94.htm | 14277 | 2024-02-28 17:20:42 |
| R95.htm | 68226 | 2024-02-28 17:20:42 |
| R96.htm | 29477 | 2024-02-28 17:20:42 |
| R97.htm | 6266 | 2024-02-28 17:20:42 |
| R98.htm | 16448 | 2024-02-28 17:20:42 |
| R99.htm | 11609 | 2024-02-28 17:20:42 |
| report.css | 2768 | 2024-02-28 17:20:42 |
| Show.js | 1086 | 2024-02-28 17:20:42 |
| wtfc-20231231.htm | 7331351 | 2024-02-28 17:20:42 |
| wtfc-20231231.xsd | 140677 | 2024-02-28 17:20:42 |
| wtfc-20231231_cal.xml | 276745 | 2024-02-28 17:20:42 |
| wtfc-20231231_def.xml | 913442 | 2024-02-28 17:20:42 |
 wtfc-20231231_g1.jpg | 119767 | 2024-02-28 17:20:42 |
| wtfc-20231231_htm.xml | 7708285 | 2024-02-28 17:20:42 |
| wtfc-20231231_lab.xml | 1915132 | 2024-02-28 17:20:42 |
| wtfc-20231231_pre.xml | 1352888 | 2024-02-28 17:20:42 |