Basis of Presentation	6 Months Ended
Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information or footnotes necessary for a complete presentation of financial condition, results of operations, changes in shareholders’ equity, or cash flows in accordance with GAAP. In our opinion, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation have been included. The results of operations for the three and six months ended June 30, 2025 are not necessarily indicative of the results expected for the year ending December 31, 2025 or any other period. The June 30, 2025 condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the First Internet Bancorp Annual Report on Form 10-K for the year ended December 31, 2024. The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, or assumptions that could have a material effect on the carrying value of certain assets and liabilities. These estimates, judgments, and assumptions affect the amounts reported in the condensed consolidated financial statements and the disclosures provided. The Company utilizes processes that involve the use of significant estimates and the judgment of management in determining the amount of the Company’s allowance for credit losses (“ACL”) and changes in any of these could have a significant impact on the condensed consolidated financial statements. The condensed consolidated financial statements include the accounts of First Internet Bancorp (the “Company”), its wholly owned subsidiary, First Internet Bank of Indiana (the “Bank”), and the Bank’s three wholly owned subsidiaries, First Internet Public Finance Corp., JKH Realty Services, LLC and SPF15, Inc. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations, and cash flows of the Company.

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information or footnotes necessary for a complete presentation of financial condition, results of operations, changes in shareholders’ equity, or cash flows in accordance with GAAP. In our opinion, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation have been included. The results of operations for the three and six months ended June 30, 2025 are not necessarily indicative of the results expected for the year ending December 31, 2025 or any other period. The June 30, 2025 condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the First Internet Bancorp Annual Report on Form 10-K for the year ended December 31, 2024.

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, or assumptions that could have a material effect on the carrying value of certain assets and liabilities. These estimates, judgments, and assumptions affect the amounts reported in the condensed consolidated financial statements and the disclosures provided. The Company utilizes processes that involve the use of significant estimates and the judgment of management in determining the amount of the Company’s allowance for credit losses (“ACL”) and changes in any of these could have a significant impact on the condensed consolidated financial statements.

The condensed consolidated financial statements include the accounts of First Internet Bancorp (the “Company”), its wholly owned subsidiary, First Internet Bank of Indiana (the “Bank”), and the Bank’s three wholly owned subsidiaries, First Internet Public Finance Corp., JKH Realty Services, LLC and SPF15, Inc. All significant intercompany accounts and transactions have been eliminated in consolidation.

The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations, and cash flows of the Company.