Industry Segment Information |
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| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Industry Segment Information | Industry Segment Information The services provided by the Company are classified into two reportable segments: Information Services and Banking Services. Each of these segments provides distinct services that are marketed through different channels and are consistent with the presentation of financial information to the chief operating decision maker to evaluate segment performance, develop strategy, and allocate resources. They are managed separately due to their unique service and processing requirements. The Company's chief operating decision maker is the President and Chief Executive Officer of Cass Information Systems' Inc. The Information Services segment provides transportation, energy, telecommunication, and environmental invoice processing and payment services to large corporations. In addition, this segment provides church management software and on-line generosity services primarily for faith-based ministries. As discussed in Note 2 to the consolidated financial statements, the Company applied discontinued operations accounting to the assets and liabilities being sold related to the TEM Business Unit as of and for the three and nine months ended September 30, 2025 and 2024, as applicable. The TEM Business Unit is included in the Information Services operating segment. The Banking Services segment provides banking services primarily to privately held businesses, franchise restaurants and faith-based ministries, as well as supporting the banking needs of the Information Services segment. The Company’s accounting policies for segments are the same as those described in the summary of significant accounting policies in the Company’s 2024 Form 10-K. Management and the chief operating decision maker evaluates segment performance based on pre-tax income after allocations for corporate expenses. Transactions between segments are accounted for at what management believes to be fair value. Substantially all revenue originates from, and all long-lived assets are located within, the United States and no revenue from any customer of any segment exceeds 10% of the Company’s consolidated revenue. Funding sources represent average balances and deposits generated by Information Services and Banking Services and there is no allocation methodology used. Banking Services interest income is determined by actual interest income on loans minus actual interest expense paid on deposits plus/minus an allocation for interest income or expense dependent on the remaining available liquidity of the segment. Information Services interest income is determined by multiplying available liquidity by actual yields on short-term investments and investment securities. Any difference between total segment interest income and overall total Company interest income is included in Corporate, Eliminations, and Other. Summarized information about the Company’s operations in each industry segment is as follows:
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