CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Operating Activities:
Net income	$ 20,859	$ 60,835	$ 69,486
Adjustments to reconcile net income to net cash provided by operating activities:
Credit loss expense (benefit)	5,849	4,492	(7,336)
Depreciation, amortization, and accretion	12,572	10,162	1,566
Net change in premises and equipment due to writedown or sale	(92)	724	271
Share-based compensation	2,403	2,541	2,153
Net loss (gain) on sale or call of debt securities available for sale	19,768	(271)	(242)
Net gain on sale of equity securities	(979)	0	0
Net change in foreclosed assets due to writedown or sale	(38)	(31)	155
Net gain on sale of loans held for sale	(1,166)	(1,842)	(8,052)
Origination and participations purchased of loans held for sale	(49,166)	(90,493)	(293,235)
Proceeds from sales of loans held for sale	49,899	104,640	348,326
Increase in cash surrender value of bank-owned life insurance	(2,500)	(2,305)	(1,889)
(Increase) decrease in deferred income taxes, net	(330)	4,326	1,768
Bargain purchase gain	0	(3,769)	0
Change in:
Other assets	6,420	(37,206)	6,615
Other liabilities	(929)	38,525	(8,032)
Net cash provided by operating activities	62,570	90,328	111,554
Investing Activities:
Purchases of equity securities	(1,125)	(1,250)	0
Proceeds from sales of equity securities	2,011	0	0
Proceeds from sales of debt securities available for sale	326,179	129,823	52,183
Proceeds from maturities and calls of debt securities available for sale	130,740	142,006	404,894
Purchases of debt securities available for sale	(89,815)	(386,278)	(1,137,996)
Proceeds from maturities and calls of debt securities held to maturity	54,543	125,456	0
Net (increase) decrease in loans held for investment	(290,174)	(312,562)	251,856
Purchases of premises and equipment	(4,055)	(2,663)	(2,014)
Proceeds from sale of foreclosed assets	184	795	2,117
Proceeds from sale of premises and equipment	1,240	29	642
Net cash acquired in business acquisition	0	31,375	0
Net cash provided by (used in) provided by investing activities	129,728	(273,269)	(428,318)
Financing Activities:
Deposits	(73,389)	(109,378)	567,302
Short-term borrowings	(91,609)	208,964	(49,421)
Payments of subordinated debt issuance costs	0	0	(9)
Redemption of subordinated debentures	0	0	(10,835)
Payments on finance lease liability	(183)	(164)	(145)
Payments of Federal Home Loan Bank borrowings	(11,000)	(31,000)	(43,000)
Proceeds from other long-term debt	0	25,000	0
Payments of other long-term debt	(5,000)	(10,000)	0
Taxes paid relating to the release/lapse of restriction on RSUs	(609)	(281)	(121)
Dividends paid	(15,216)	(14,870)	(14,282)
Repurchase of common stock	0	(2,725)	(11,554)
Net cash (used in) provided by financing activities	(197,006)	65,546	437,935
Net change in cash and cash equivalents	(4,708)	(117,395)	121,171
Cash and cash equivalents at beginning of year	86,435	203,830	82,659
Cash and cash equivalents at end of year	81,727	86,435	203,830
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	97,505	27,841	21,451
Cash paid during the period for income taxes, net of refunds	3,437	13,222	17,985
Supplemental schedule of non-cash investing and financing activities:
Transfer of loans to foreclosed assets	3,972	510	313
Investment securities purchased but not settled	0	0	2,480
Transfer of premises and equipment to assets held for sale	327	1,349	0
Transfer of debt securities available for sale to debt securities held to maturity	0	1,253,179	0
ATBancorp
Non-cash assets acquired:
Investment securities	0	119,820	0
Total loans held for investment, net	0	281,326	0
Premises and equipment	0	7,363	0
Bank-owned life insurance	0	7,862	0
Other assets	0	6,278	0
Total non-cash assets acquired	0	439,149	0
Liabilities assumed:
Deposits	0	463,638	0
Short-term borrowings	0	1,541	0
FHLB borrowings	0	250	0
Other liabilities	0	1,326	0
Total liabilities assumed	0	466,755	0
Core deposit intangible | ATBancorp
Non-cash assets acquired:
Core deposit intangible	$ 0	$ 16,500	$ 0