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Segment Information
 9 Months Ended
Sep. 30, 2023
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 table 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” of the 2022 Form 10-K. 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:
Three Months Ended$ Change in
Contribution		% Change  in
Contribution
(Dollars in thousands)September 30,
2023		September 30,
2022
Net interest income:
Community Banking$360,575 $319,929 $40,646 13 %
Specialty Finance85,427 64,122 21,305 33 
Wealth Management7,997 9,585 (1,588)(17)
Total Operating Segments453,999 393,636 60,363 15 
Intersegment Eliminations8,359 7,812 547 7 
Consolidated net interest income$462,358 $401,448 $60,910 15 %
Provision for credit losses:
Community Banking$16,742 $3,608 $13,134 NM
Specialty Finance3,181 2,812 369 13 
Wealth Management— — — — 
Total Operating Segments19,923 6,420 13,503 NM
Intersegment Eliminations— — — — 
Consolidated provision for credit losses$19,923 $6,420 $13,503 NM
Non-interest income:
Community Banking$70,536 $60,615 $9,921 16 %
Specialty Finance20,793 23,784 (2,991)(13)
Wealth Management37,312 32,452 4,860 15 
Total Operating Segments128,641 116,851 11,790 10 
Intersegment Eliminations(16,163)(15,369)(794)5 
Consolidated non-interest income$112,478 $101,482 $10,996 11 %
Net revenue:
Community Banking$431,111 $380,544 $50,567 13 %
Specialty Finance106,220 87,906 18,314 21 
Wealth Management45,309 42,037 3,272 8 
Total Operating Segments582,640 510,487 72,153 14 
Intersegment Eliminations(7,804)(7,557)(247)3 
Consolidated net revenue$574,836 $502,930 $71,906 14 %
Segment profit:
Community Banking$115,156 $104,668 $10,488 10 %
Specialty Finance40,548 27,187 13,361 49 
Wealth Management8,494 11,106 (2,612)(24)
Consolidated net income$164,198 $142,961 $21,237 15 %
Segment assets:
Community Banking$43,801,560 $41,193,521 $2,608,039 6 %
Specialty Finance10,521,547 9,450,977 1,070,570 11 
Wealth Management1,232,139 1,738,441 (506,302)(29)
Consolidated total assets$55,555,246 $52,382,939 $3,172,307 6 %
NM - Not meaningful
Nine Months Ended$ Change in
Contribution		% Change  in
Contribution
(Dollars in thousands)September 30,
2023		September 30,
2022
Net interest income:
Community Banking$1,076,655 $810,270 $266,385 33 %
Specialty Finance240,771 178,210 62,561 35 
Wealth Management24,356 27,495 (3,139)(11)
Total Operating Segments1,341,782 1,015,975 325,807 32 
Intersegment Eliminations26,108 22,571 3,537 16 
Consolidated net interest income$1,367,890 $1,038,546 $329,344 32 %
Provision for credit losses:
Community Banking$64,554 $27,951 $36,603 NM
Specialty Finance6,928 2,992 3,936 NM
Wealth Management— — — — 
Total Operating Segments71,482 30,943 40,539 NM
Intersegment Eliminations— — — — 
Consolidated provision for credit losses$71,482 $30,943 $40,539 NM
Non-interest income:
Community Banking$207,399 $245,217 $(37,818)(15)%
Specialty Finance78,320 72,898 5,422 7 
Wealth Management101,000 93,256 7,744 8 
Total Operating Segments386,719 411,371 (24,652)(6)
Intersegment Eliminations(53,442)(44,157)(9,285)21 
Consolidated non-interest income$333,277 $367,214 $(33,937)(9)%
Net revenue:
Community Banking$1,284,054 $1,055,487 $228,567 22 %
Specialty Finance319,091 251,108 67,983 27 
Wealth Management125,356 120,751 4,605 4 
Total Operating Segments1,728,501 1,427,346 301,155 21 
Intersegment Eliminations(27,334)(21,586)(5,748)27 
Consolidated net revenue$1,701,167 $1,405,760 $295,407 21 %
Segment profit:
Community Banking$351,905 $249,414 $102,491 41 %
Specialty Finance123,687 87,349 36,338 42 
Wealth Management23,554 28,102 (4,548)(16)
Consolidated net income$499,146 $364,865 $134,281 37 %
NM - Not meaningful