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Segment Information | 12 Months Ended
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Dec. 31, 2022
Segment Reporting [Abstract] |
Segment Information | Segment Information The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management. The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures and economic characteristics. For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note (10) “Deposits” for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment’s risk-weighted assets. The segment financial information provided in the following tables has been derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in Note (1) “Summary of Significant Accounting Policies”. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment. The following is a summary of certain operating information for reportable segments:
(In thousands) |  | Community Banking |  | Specialty Finance |  | Wealth Management |  | Total Operating Segments |  | Intersegment Eliminations |  | Consolidated
2022 |  |  |  |  |  |  |  |  |  |  |  |
Net interest income |  | $ | 1,180,198 |  |  | $ | 246,681 |  |  | $ | 38,304 |  |  | $ | 1,465,183 |  |  | $ | 30,179 |  |  | $ | 1,495,362 |
Provision for credit losses |  | 74,184 |  |  | 4,405 |  |  | — |  |  | 78,589 |  |  | — |  |  | 78,589 |
Non-interest income |  | 298,572 |  |  | 97,701 |  |  | 124,609 |  |  | 520,882 |  |  | (59,829) |  |  | 461,053 |
Non-interest expense |  | 926,298 |  |  | 172,784 |  |  | 107,839 |  |  | 1,206,921 |  |  | (29,650) |  |  | 1,177,271 |
Income tax expense |  | 128,939 |  |  | 46,286 |  |  | 15,648 |  |  | 190,873 |  |  | — |  |  | 190,873 |
Net income |  | $ | 349,349 |  |  | $ | 120,907 |  |  | $ | 39,426 |  |  | $ | 509,682 |  |  | $ | — |  |  | $ | 509,682 |
Total assets at end of year |  | $ | 41,368,200 |  |  | $ | 9,826,254 |  |  | $ | 1,755,195 |  |  | $ | 52,949,649 |  |  | $ | — |  |  | $ | 52,949,649 |
2021 |  |  |  |  |  |  |  |  |  |  |  |
Net interest income |  | $ | 868,477 |  |  | $ | 197,958 |  |  | $ | 31,939 |  |  | $ | 1,098,374 |  |  | $ | 26,583 |  |  | $ | 1,124,957 |
Provision for credit losses |  | (60,309) |  |  | 1,046 |  |  | — |  |  | (59,263) |  |  | — |  |  | (59,263) |
Non-interest income |  | 422,698 |  |  | 95,822 |  |  | 128,951 |  |  | 647,471 |  |  | (61,351) |  |  | 586,120 |
Non-interest expense |  | 912,296 |  |  | 143,526 |  |  | 111,490 |  |  | 1,167,312 |  |  | (34,768) |  |  | 1,132,544 |
Income tax expense |  | 120,092 |  |  | 40,040 |  |  | 11,513 |  |  | 171,645 |  |  | — |  |  | 171,645 |
Net income |  | $ | 319,096 |  |  | $ | 109,168 |  |  | $ | 37,887 |  |  | $ | 466,151 |  |  | $ | — |  |  | $ | 466,151 |
Total assets at end of year |  | $ | 40,253,818 |  |  | $ | 8,382,722 |  |  | $ | 1,505,603 |  |  | $ | 50,142,143 |  |  | $ | — |  |  | $ | 50,142,143 |
2020 |  |  |  |  |  |  |  |  |  |  |  |
Net interest income |  | $ | 808,443 |  |  | $ | 177,025 |  |  | $ | 30,612 |  |  | $ | 1,016,080 |  |  | $ | 23,827 |  |  | $ | 1,039,907 |
Provision for credit losses |  | 206,774 |  |  | 7,446 |  |  | — |  |  | 214,220 |  |  | — |  |  | 214,220 |
Non-interest income |  | 469,187 |  |  | 86,268 |  |  | 103,438 |  |  | 658,893 |  |  | (54,704) |  |  | 604,189 |
Non-interest expense |  | 855,797 |  |  | 118,560 |  |  | 96,615 |  |  | 1,070,972 |  |  | (30,877) |  |  | 1,040,095 |
Income tax expense |  | 51,439 |  |  | 36,956 |  |  | 8,396 |  |  | 96,791 |  |  | — |  |  | 96,791 |
Net income |  | $ | 163,620 |  |  | $ | 100,331 |  |  | $ | 29,039 |  |  | $ | 292,990 |  |  | $ | — |  |  | $ | 292,990 |
Total assets at end of year |  | $ | 36,769,640 |  |  | $ | 7,015,590 |  |  | $ | 1,295,538 |  |  | $ | 45,080,768 |  |  | $ | — |  |  | $ | 45,080,768 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI https://asc.fasb.org/topic&trid=2134510 + Details
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