Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest and dividend income
Loans, including fees	$ 176,379	$ 90,613	$ 90,923
Loans held-for-sale	130	165	306
Securities:
Taxable	31,566	8,168	6,773
Tax exempt	5,287	5,107	5,471
Dividends from FHLBC and FRBC stock	936	456	484
Interest bearing deposits with financial institutions	2,175	656	258
Total interest and dividend income	216,473	105,165	104,215
Interest expense
Savings, NOW, and money market deposits	1,900	961	1,569
Time deposits	1,448	1,510	5,033
Securities sold under repurchase agreements	40	82	202
Other short-term borrowings	480		179
Junior subordinated debentures	1,136	1,133	2,215
Subordinated debt	2,185	1,610
Senior notes	2,682	2,692	2,692
Notes payable and other borrowings	446	462	574
Total interest expense	10,317	8,450	12,464
Net interest and dividend income	206,156	96,715	91,751
Provision for credit losses	6,550	4,326	10,413
Net interest and dividend income after provision for credit losses	199,606	92,389	81,338
Noninterest income
Mortgage servicing rights mark to market gain (loss)	3,177	1,261	(3,999)
Net gain on sales of mortgage loans	2,022	9,300	15,519
Securities (losses) gains, net	(944)	232	(25)
Change in cash surrender value of BOLI	718	1,390	1,233
Death benefit realized on BOLI			57
Card related income	10,989	6,712	5,532
Other income	5,243	2,329	2,149
Total noninterest income	43,116	39,260	37,487
Noninterest expense
Salaries and employee benefits	86,573	57,691	49,547
Occupancy, furniture and equipment	14,992	13,548	8,498
Computer and data processing	15,795	7,936	5,143
FDIC insurance	2,401	975	597
Net teller & bill paying	3,730	874	648
General bank insurance	1,221	1,214	1,030
Amortization of core deposit intangible	2,626	644	494
Advertising expense	589	343	298
Card related expense	4,348	2,538	2,195
Legal fees	873	1,096	761
Consulting & management fees	2,425	5,005	760
Other real estate expense, net	130	151	651
Other expense	15,470	11,767	10,795
Total noninterest expense	151,173	103,782	81,417
Income before income taxes	91,549	27,867	37,408
Provision for income taxes	24,144	7,823	9,583
Net income available to common stockholders	$ 67,405	$ 20,044	$ 27,825
Basic earnings per share	$ 1.51	$ 0.66	$ 0.94
Diluted earnings per share	1.49	0.65	0.92
Dividends declared per share	$ 0.20	$ 0.16	$ 0.04
Wealth management
Noninterest income
Service charges on deposits	$ 9,887	$ 9,408	$ 7,905
Secondary mortgage fees
Noninterest income
Service charges on deposits	332	1,044	1,654
Bank Servicing
Noninterest income
Service charges on deposits	9,562	5,403	5,512
Mortgage servicing income
Noninterest income
Service charges on deposits	$ 2,130	$ 2,181	$ 1,950