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Segment Information
 9 Months Ended
Sep. 30, 2024
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 sixteen 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” in Item 1 of this report 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 2023 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,
2024		September 30,
2023
Net interest income:
Community Banking$396,894 $360,575 $36,319 10 %
Specialty Finance88,448 85,427 3,021 4 
Wealth Management6,932 7,997 (1,065)(13)
Total Operating Segments492,274 453,999 38,275 8 
Intersegment Eliminations10,309 8,359 1,950 23 
Consolidated net interest income$502,583 $462,358 $40,225 9 %
Provision for credit losses:
Community Banking$20,475 $16,742 $3,733 22 %
Specialty Finance1,859 3,181 (1,322)(42)
Wealth Management— — — — 
Total Operating Segments22,334 19,923 2,411 12 
Intersegment Eliminations— — — — 
Consolidated provision for credit losses$22,334 $19,923 $2,411 12 %
Non-interest income:
Community Banking$66,323 $70,536 $(4,213)(6)%
Specialty Finance29,587 20,793 8,794 42 
Wealth Management37,431 37,312 119 0 
Total Operating Segments133,341 128,641 4,700 4 
Intersegment Eliminations(20,194)(16,163)(4,031)25 
Consolidated non-interest income$113,147 $112,478 $669 1 %
Net revenue:
Community Banking$463,217 $431,111 $32,106 7 %
Specialty Finance118,035 106,220 11,815 11 
Wealth Management44,363 45,309 (946)(2)
Total Operating Segments625,615 582,640 42,975 7 
Intersegment Eliminations(9,885)(7,804)(2,081)27 
Consolidated net revenue$615,730 $574,836 $40,894 7 %
Segment profit:
Community Banking$115,213 $115,156 $57 0 %
Specialty Finance46,803 40,548 6,255 15 
Wealth Management7,985 8,494 (509)(6)
Consolidated net income$170,001 $164,198 $5,803 4 %
Segment assets:
Community Banking$51,598,626 $43,801,560 $7,797,066 18 %
Specialty Finance11,047,585 10,521,547 526,038 5 
Wealth Management1,142,213 1,232,139 (89,926)(7)
Consolidated total assets$63,788,424 $55,555,246 $8,233,178 15 %
NM - Not meaningful
Nine Months Ended$ Change in
Contribution		% Change  in
Contribution
(Dollars in thousands)September 30,
2024		September 30,
2023
Net interest income:
Community Banking$1,119,411 $1,076,655 $42,756 4 %
Specialty Finance265,921 240,771 25,150 10 
Wealth Management22,618 24,356 (1,738)(7)
Total Operating Segments1,407,950 1,341,782 66,168 5 
Intersegment Eliminations29,437 26,108 3,329 13 
Consolidated net interest income$1,437,387 $1,367,890 $69,497 5 %
Provision for credit losses:
Community Banking$77,192 $64,554 $12,638 20 %
Specialty Finance6,876 6,928 (52)(1)
Wealth Management— — — — 
Total Operating Segments84,068 71,482 12,586 18 
Intersegment Eliminations— — — — 
Consolidated provision for credit losses$84,068 $71,482 $12,586 18 %
Non-interest income:
Community Banking$212,578 $207,399 $5,179 2 %
Specialty Finance89,221 78,320 10,901 14 
Wealth Management131,521 101,000 30,521 30 
Total Operating Segments433,320 386,719 46,601 12 
Intersegment Eliminations(58,446)(53,442)(5,004)9 
Consolidated non-interest income$374,874 $333,277 $41,597 12 %
Net revenue:
Community Banking$1,331,989 $1,284,054 $47,935 4 %
Specialty Finance355,142 319,091 36,051 11 
Wealth Management154,139 125,356 28,783 23 
Total Operating Segments1,841,270 1,728,501 112,769 7 
Intersegment Eliminations(29,009)(27,334)(1,675)6 
Consolidated net revenue$1,812,261 $1,701,167 $111,094 7 %
Segment profit:
Community Banking$326,495 $351,905 $(25,410)18 %
Specialty Finance142,417 123,687 18,730 5 
Wealth Management40,771 23,554 17,217 (7)
Consolidated net income$509,683 $499,146 $10,537 15 %
NM - Not meaningful