CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Statement of Cash Flows [Abstract]
Net income	$ 117,128	$ 101,181
Total provision for credit losses	11,851	8,886
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	3,723	3,276
Depreciation of equipment owned and leased to others	1,894	3,194
Stock-based compensation	4,192	3,946
(Accretion) amortization of investment securities premiums and discounts, net	(2,241)	1,961
Amortization of mortgage servicing rights	555	576
Amortization of right of use assets	2,246	2,287
Deferred income taxes	(7,868)	360
Losses on investment securities available-for-sale	2,874	0
Originations of loans held for sale, net of principal collected	(48,312)	(46,368)
Proceeds from the sales of loans held for sale	43,838	45,132
Net gain on sale of loans held for sale	(67)	(1,012)
Net gain on sale of other real estate and repossessions	(158)	(152)
Change in interest receivable	652	(489)
Change in interest payable	(8,714)	13,497
Change in other assets	8,589	(316)
Change in other liabilities	39,053	24,106
Other	(1,543)	243
Net change in operating activities	167,692	160,308
Investing activities:
Proceeds from sales of investment securities available-for-sale	99,246	0
Proceeds from maturities and paydowns of investment securities available-for-sale	270,986	240,718
Purchases of investment securities available-for-sale	(275,745)	(137,520)
Net change in partnership investments	(11,726)	(21,601)
Net change in other investments	1,715	1,220
Loans sold or participated to others	31,324	91,368
Proceeds from principal payments on direct finance leases	63,390	52,631
Net change in loans and leases	(217,833)	(247,974)
Net change in equipment owned under operating leases	1,940	4,161
Purchases of premises and equipment	(8,124)	(5,827)
Proceeds from disposal of premises and equipment	122	525
Proceeds from sales of other real estate and repossessions	4,891	1,557
Net Cash Provided by (Used in) Investing Activities	(39,814)	(20,742)
Financing activities:
Net change in demand deposits and savings accounts	102,612	(16,558)
Net change in time deposits	77,172	103,921
Net change in short-term borrowings	(175,624)	(146,682)
Payments on long-term debt	(2,337)	(12,592)
Stock issued under stock purchase plans	133	153
Acquisition of treasury stock	(9,675)	0
Net (distributions to) contributions from noncontrolling interests	(2,387)	(1,819)
Cash dividends paid on common stock	(28,340)	(26,296)
Net change in financing activities	(38,446)	(99,873)
Net change in cash and cash equivalents	89,432	39,693
Cash and cash equivalents, beginning of year	124,826	129,668
Cash and cash equivalents, end of period	214,258	169,361
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	4,723	838
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	1,227	1,153
Right of use assets obtained in exchange for lease obligations	2,084	2,436
Liquidation of noncontrolling interests	13,085	5,920
Purchases of mandatorily redeemable securities with common stock	102	628
Cash paid (received) for:
Interest	135,241	125,920
Income Taxes	$ (7,984)	$ 10,334

1ST SOURCE CORP 10-Q