Old Second Bancorp (OSBC) 10-Q9 May 242024 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2024	May 03, 2024
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2024
Entity File Number	000-10537
Entity Registrant Name	OLD SECOND BANCORP INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3143493
Entity Address, Address Line One	37 South River Street
Entity Address, City or Town	Aurora
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60507
City Area Code	630
Local Phone Number	892-0202
Title of 12(b) Security	Common Stock
Trading Symbol	OSBC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		44,845,629
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000357173
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 48,841	$ 55,534
Interest earning deposits with financial institutions	49,253	44,611
Cash and cash equivalents	98,094	100,145
Securities available-for-sale, at fair value	1,168,797	1,192,829
Federal Home Loan Bank Chicago ("FHLBC") and Federal Reserve Bank Chicago ("FRBC") stock	28,518	33,355
Loans held-for-sale	1,072	1,322
Total Loans	3,969,411	4,042,953
Less: allowance for credit losses on loans	44,113	44,264
Net loans	3,925,298	3,998,689
Premises and equipment, net	81,290	79,310
Other real estate owned	5,123	5,123
Mortgage servicing rights, at fair value	10,564	10,344
Goodwill	86,478	86,478
Core deposit intangible	10,637	11,217
Bank-owned life insurance ("BOLI")	110,490	109,318
Deferred tax assets, net	31,699	31,077
Other assets	58,012	63,592
Total assets	5,616,072	5,722,799
Deposits:
Noninterest bearing demand	1,799,927	1,834,891
Interest bearing:
Savings, NOW, and money market	2,221,696	2,207,949
Time	586,652	527,906
Total deposits	4,608,275	4,570,746
Securities sold under repurchase agreements	33,546	26,470
Other short-term borrowings	220,000	405,000
Junior subordinated debentures	25,773	25,773
Subordinated debentures	59,403	59,382
Other liabilities	72,916	58,147
Total liabilities	5,019,913	5,145,518
Stockholders' Equity
Common stock	44,908	44,705
Additional paid-in capital	203,129	202,223
Retained earnings	412,388	393,311
Accumulated other comprehensive loss	(63,361)	(62,781)
Treasury stock	(905)	(177)
Total stockholders' equity	596,159	577,281
Total liabilities and stockholders' equity	$ 5,616,072	$ 5,722,799

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Consolidated Balance Sheets
Common stock, Par value (in dollars per share)	$ 1	$ 1
Common stock, Shares authorized	60,000,000	60,000,000
Common stock, Shares issued	44,907,619	44,705,150
Common stock, Shares outstanding	44,845,629	44,697,917
Treasury stock, Shares	61,990	7,233

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Interest and dividend income
Loans, including fees	$ 62,673	$ 57,210
Loans held-for-sale	14	12
Securities:
Taxable	8,092	10,735
Tax exempt	1,306	1,337
Dividends from FHLBC and FRBC stock	635	280
Interest bearing deposits with financial institutions	610	585
Total interest and dividend income	73,330	70,159
Interest expense
Savings, NOW, and money market deposits	4,037	1,149
Time deposits	4,041	664
Securities sold under repurchase agreements	86	9
Other short-term borrowings	4,557	2,345
Junior subordinated debentures	280	279
Subordinated debentures	546	546
Senior notes		994
Notes payable and other borrowings		87
Total interest expense	13,547	6,073
Net interest and dividend income	59,783	64,086
Provision for credit losses	3,500	3,501
Net interest and dividend income after provision for credit losses	56,283	60,585
Noninterest income
Mortgage servicing rights mark to market gain (loss)	94	(525)
Net gain on sales of mortgage loans	314	306
Securities gains (losses), net	1	(1,675)
Change in cash surrender value of BOLI	1,172	242
Card related income	2,376	2,244
Other income	1,030	1,489
Total noninterest income	10,501	7,350
Noninterest expense
Salaries and employee benefits	24,312	22,248
Occupancy, furniture and equipment	3,927	3,475
Computer and data processing	2,255	1,774
FDIC insurance	667	584
Net teller & bill paying	521	502
General bank insurance	309	305
Amortization of core deposit intangible	580	624
Advertising expense	192	142
Card related expense	1,277	1,216
Legal fees	226	319
Consulting & management fees	336	790
Other real estate expense, net	46	306
Other expense	3,593	3,637
Total noninterest expense	38,241	35,922
Income before income taxes	28,543	32,013
Provision for income taxes	7,231	8,406
Net income	$ 21,312	$ 23,607
Basic earnings per share	$ 0.48	$ 0.53
Diluted earnings per share	0.47	0.52
Dividends declared per share	$ 0.05	$ 0.05
Wealth management
Noninterest income
Service charges on deposits	$ 2,561	$ 2,270
Service charges on deposits
Noninterest income
Service charges on deposits	2,415	2,424
Secondary mortgage fees
Noninterest income
Service charges on deposits	50	59
Mortgage servicing income
Noninterest income
Service charges on deposits	$ 488	$ 516

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Consolidated Statements of Comprehensive Income (Loss)
Net Income (Loss)	$ 21,312	$ 23,607
Unrealized holding (losses) gains on available-for-sale securities arising during the period	(876)	16,210
Related tax benefit (expense)	245	(4,536)
Holding (losses) gains, after tax, on available-for-sale securities	(631)	11,674
Reclassification adjustment for the net gains (losses) realized during the period
Net realized gains (losses)	1	(1,675)
Related tax benefit		471
Net realized gains (losses) after tax	1	(1,204)
Other comprehensive (loss) income on available-for-sale securities	(632)	12,878
Changes in fair value of derivatives used for cash flow hedges	52	1,602
Related tax expense		(456)
Other comprehensive income on cash flow hedges	52	1,146
Total other comprehensive (loss) income	(580)	14,024
Total comprehensive income	$ 20,732	$ 37,631

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 21,312	$ 23,607
Adjustments to reconcile net income to net cash provided by operating activities:
Net premium / discount amortization on securities	821	799
Securities (gains) losses, net	(1)	1,675
Provision for credit losses	3,500	3,501
Originations of loans held-for-sale	(9,103)	(10,206)
Proceeds from sales of loans held-for-sale	9,536	9,957
Net gains on sales of mortgage loans	(314)	(306)
Mortgage servicing rights mark to market (gain) loss	(94)	525
Net accretion of discount on loans and unfunded commitments	(157)	(1,180)
Net change in cash surrender value of BOLI	(1,172)	(242)
Net losses on sale of other real estate owned		28
Provision for other real estate owned valuation losses		269
Depreciation of fixed assets and amortization of leasehold improvements	1,350	1,046
Net gains on disposal and transfer of fixed assets		(434)
Amortization of core deposit intangibles	580	624
Change in current income taxes receivable	4,825	7,043
Deferred tax (benefit) expense	(375)	1,442
Change in accrued interest receivable and other assets	1,543	2,635
Accretion of purchase accounting adjustment on time deposits	(78)	(367)
Change in accrued interest payable and other liabilities	14,059	(6,344)
Stock based compensation	1,058	932
Net cash provided by operating activities	47,290	35,004
Cash flows from investing activities
Proceeds from maturities and calls, including pay down of securities available-for-sale	32,665	37,718
Proceeds from sales of securities available-for-sale	5,331	66,170
Purchases of securities available-for-sale	(15,661)	(4,186)
Proceeds from redemptions (purchases) of FHLBC/FRBC stock	4,837	(9,675)
Net change in loans	70,048	(132,445)
Proceeds from sales of other real estate owned, net of participations and improvements		300
Proceeds from disposition of premises and equipment		756
Net purchases of premises and equipment	(3,330)	(1,560)
Net cash provided by (used in) investing activities	93,890	(42,922)
Cash flows from financing activities
Net change in deposits	37,607	(213,136)
Net change in securities sold under repurchase agreements	7,076	(4,259)
Net change in other short-term borrowings	(185,000)	225,000
Repayment of term note		(9,000)
Vesting of restricted stock	99
Dividends paid on common stock	(2,237)	(2,237)
Purchase of treasury stock	(776)	(605)
Net cash (used in) provided by financing activities	(143,231)	(4,237)
Net change in cash and cash equivalents	(2,051)	(12,155)
Cash and cash equivalents at beginning of period	100,145	115,177
Cash and cash equivalents at end of period	$ 98,094	$ 103,022

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at Dec. 31, 2022	$ 44,705	$ 202,276	$ 310,512	$ (93,124)	$ (3,228)	$ 461,141
Increase (Decrease) in Stockholders' Equity
Net income			23,607			23,607
Other comprehensive income loss, net of tax				14,024		14,024
Dividends declared on common stock			(2,229)			(2,229)
Vesting of restricted stock		(3,087)			3,087
Stock based compensation		932				932
Purchase of treasury stock from taxes withheld on stock awards					(605)	(605)
Balance at Mar. 31, 2023	44,705	200,121	331,890	(79,100)	(746)	496,870
Balance at Dec. 31, 2023	44,705	202,223	393,311	(62,781)	(177)	577,281
Increase (Decrease) in Stockholders' Equity
Net income			21,312			21,312
Other comprehensive income loss, net of tax				(580)		(580)
Dividends declared on common stock			(2,235)			(2,235)
Vesting of restricted stock	203	(152)			48	99
Stock based compensation		1,058				1,058
Purchase of treasury stock from taxes withheld on stock awards					(776)	(776)
Balance at Mar. 31, 2024	$ 44,908	$ 203,129	$ 412,388	$ (63,361)	$ (905)	$ 596,159

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance	$ 577,281	$ 461,141
Other comprehensive (loss) income, net of tax	(580)	14,024
Balance	$ 596,159	$ 496,870
Dividend declared and paid (per share)	$ 0.05	$ 0.05
Total Accumulated Other Comprehensive Income/(Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance	$ (62,781)	$ (93,124)
Other comprehensive (loss) income, net of tax	(580)	14,024
Balance	(63,361)	(79,100)
Accumulated Unrealized Gain (Loss) on Securities Available-for-Sale
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance	(60,590)	(88,892)
Other comprehensive (loss) income, net of tax	(632)	12,878
Balance	(61,222)	(76,014)
Accumulated Unrealized Gain (Loss) on Derivative Instruments
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance	(2,191)	(4,232)
Other comprehensive (loss) income, net of tax	52	1,146
Balance	$ (2,139)	$ (3,086)

Basis of Presentation and Chang

Basis of Presentation and Changes in Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Basis of Presentation and Changes in Significant Accounting Policies
Summary of Significant Accounting Policies	Note 1 – Basis of Presentation and Changes in Significant Accounting Policies The accounting policies followed in the preparation of the interim consolidated financial statements are consistent with those used in the preparation of the annual financial information. The interim consolidated financial statements reflect all normal and recurring adjustments that are necessary, in the opinion of management, for a fair statement of results for the interim period presented. Results for the period ended March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024. These interim consolidated financial statements and accompanying notes are unaudited and should be read in conjunction with the audited financial statements and notes included in Old Second Bancorp, Inc.’s (the “Company”) annual report on Form 10-K for the year ended December 31, 2023. Unless otherwise indicated, dollar amounts in the tables contained in the notes to the consolidated financial statements are in thousands. Certain items in prior periods have been reclassified to conform to the current presentation. The Company’s consolidated financial statements are prepared in accordance with United States generally accepted accounting principles (“GAAP”) and follow general practices within the banking industry. Application of these principles requires management to make estimates, assumptions, and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. These estimates, assumptions, and judgments are based on information available as of the date of the consolidated financial statements. Future changes in information may affect these estimates, assumptions, and judgments, which, in turn, may affect amounts reported in the consolidated financial statements. Recent Accounting Pronouncements The following is a summary of recent accounting pronouncements that have impacted or could potentially affect the Company : ASU 2023-06 ASU 2023-09 ASU 2024-01 – ASU 2024-02 – Change in Significant Accounting Policies Significant accounting policies are presented in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. These policies, along with the disclosures presented in the other financial statement notes and in this discussion, provide information on how significant assets and liabilities are valued in the consolidated financial statements and how those values are determined. During the first quarter of 2024, the Company had no changes to significant accounting policies or estimates. Subsequent Events On April 16, 2024, our Board of Directors declared a cash dividend of $0.05 per share of common stock payable on May 6, 2024, to stockholders of record as of April 26, 2024; dividends of $2.2 million were paid to stockholders on May 6, 2024.

Securities

Securities	3 Months Ended
Securities	Mar. 31, 2024
Securities
Securities	Note 2 – Securities Investment Portfolio Management Our investment portfolio serves the liquidity needs and income objectives of the Company. While the portfolio serves as an important component of the overall liquidity management at the Bank, portions of the portfolio also serve as income producing assets. The size and composition of the portfolio reflects liquidity needs, loan demand and interest income objectives. Portfolio size and composition will be adjusted from time to time. While a significant portion of the portfolio consists of readily marketable securities to address liquidity, other parts of the portfolio may reflect funds invested pending future loan demand or to maximize interest income without undue interest rate risk. Investments are comprised of debt securities and non-marketable equity investments. Securities available-for-sale are carried at fair value. Unrealized gains and losses, net of tax, on securities available-for-sale are reported as a separate component of equity. This balance sheet component changes as interest rates and market conditions change. Unrealized gains and losses are not included in the calculation of regulatory capital. Federal Home Loan Bank of Chicago (“FHLBC”) and Federal Reserve Bank of Chicago (“FRBC”) stock are considered nonmarketable equity investments. FHLBC stock was recorded at $13.6 million at March 31, 2024 and $18.5 million at December 31, 2023. FRBC stock was recorded at $14.9 million at March 31, 2024 and December 31, 2023. The following tables summarize the amortized cost and fair value of the securities portfolio at March 31, 2024, and December 31, 2023, and the corresponding amounts of gross unrealized gains and losses: Gross Gross Amortized Unrealized Unrealized Fair March 31, 2024 Cost 1 Gains Losses Value Securities available-for-sale U.S. Treasury $ 174,712 $ - $ (3,712) $ 171,000 U.S. government agencies 59,829 - (2,850) 56,979 U.S. government agencies mortgage-backed 114,061 - (12,986) 101,075 States and political subdivisions 233,343 682 (11,283) 222,742 Collateralized mortgage obligations 431,084 272 (51,753) 379,603 Asset-backed securities 69,666 37 (2,996) 66,707 Collateralized loan obligations 171,131 52 (492) 170,691 Total securities available-for-sale $ 1,253,826 $ 1,043 $ (86,072) $ 1,168,797 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2023 Cost 1 Gains Losses Value Securities available-for-sale U.S. Treasury $ 174,602 $ - $ (5,028) $ 169,574 U.S. government agencies 60,011 - (3,052) 56,959 U.S. government agencies mortgage-backed 118,492 - (12,122) 106,370 States and political subdivisions 236,072 1,325 (10,332) 227,065 Collateralized mortgage obligations 442,987 421 (50,864) 392,544 Asset-backed securities 71,616 42 (3,222) 68,436 Collateralized loan obligations 173,201 30 (1,350) 171,881 Total securities available-for-sale $ 1,276,981 $ 1,818 $ (85,970) $ 1,192,829 1 Excludes accrued interest receivable of $6.3 million and $6.6 million at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the consolidated balance sheets. The fair value, amortized cost and weighted average yield of debt securities at March 31, 2024, by contractual maturity, are listed in the table below. Securities not due at a single maturity date are shown separately. Weighted Amortized Average Fair Securities available-for-sale Cost Yield Value Due in one year or less $ 197,825 1.05 % $ 193,861 Due after one year through five years 53,675 1.92 50,940 Due after five years through ten years 56,283 2.77 51,681 Due after ten years 160,101 3.11 154,239 467,884 2.06 450,721 Mortgage-backed and collateralized mortgage obligations 545,145 2.43 480,678 Asset-backed securities 69,666 4.06 66,707 Collateralized loan obligations 171,131 6.84 170,691 Total securities available-for-sale $ 1,253,826 2.99 % $ 1,168,797 At March 31, 2024, the Company had no securities issued from any one originator, other than the U.S. Government and its agencies, which individually amounted to over 10% of the Company’s stockholders’ equity. Securities with unrealized losses with no corresponding allowance for credit losses at March 31, 2024 and December 31, 2023, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows (in thousands except for number of securities): Less than 12 months 12 months or more March 31, 2024 in an unrealized loss position in an unrealized loss position Total Number of Unrealized Fair Number of Unrealized Fair Number of Unrealized Fair Securities available-for-sale Securities Losses Value Securities Losses Value Securities Losses Value U.S. Treasuries - $ - $ - 4 $ 3,712 $ 171,000 4 $ 3,712 $ 171,000 U.S. government agencies - - - 9 2,850 56,979 9 2,850 56,979 U.S. government agencies mortgage-backed - - - 128 12,986 101,075 128 12,986 101,075 States and political subdivisions 20 299 63,127 35 10,984 126,955 55 11,283 190,082 Collateralized mortgage obligations - - - 144 51,753 364,263 144 51,753 364,263 Asset-backed securities - - - 18 2,996 60,864 18 2,996 60,864 Collateralized loan obligations 2 7 10,396 15 485 99,070 17 492 109,466 Total securities available-for-sale 22 $ 306 $ 73,523 353 $ 85,766 $ 980,206 375 $ 86,072 $ 1,053,729 Less than 12 months 12 months or more December 31, 2023 in an unrealized loss position in an unrealized loss position Total Number of Unrealized Fair Number of Unrealized Fair Number of Unrealized Fair Securities available-for-sale Securities Losses Value Securities Losses Value Securities Losses Value U.S. Treasuries - $ - $ - 4 $ 5,028 $ 169,574 4 $ 5,028 $ 169,574 U.S. government agencies - - - 9 3,052 56,959 9 3,052 56,959 U.S. government agencies mortgage-backed - - - 128 12,122 106,370 128 12,122 106,370 States and political subdivisions 12 137 27,974 25 10,195 106,138 37 10,332 134,112 Collateralized mortgage obligations 2 8 734 143 50,856 376,236 145 50,864 376,970 Asset-backed securities - - - 19 3,222 63,941 19 3,222 63,941 Collateralized loan obligations - - - 25 1,350 150,902 25 1,350 150,902 Total securities available-for-sale 14 $ 145 $ 28,708 353 $ 85,825 $ 1,030,120 367 $ 85,970 $ 1,058,828 Each quarter, we perform an analysis to determine if any of the unrealized losses on securities available-for-sale are comprised of credit losses as compared to unrealized losses due to market interest rate adjustments. Our assessment includes a review of the unrealized loss for each security issuance held; the financial condition and near-term prospects of the issuer, including external credit ratings and recent downgrades; and our ability and intent to hold the security for a period of time sufficient for a recovery in value. We also consider the extent to which the securities are issued by the federal government or its agencies, and any guarantee of issued amounts by those agencies. The portfolio continues to consist of a mix of fixed and floating-rate, high quality securities, largely rated AA (or better), displaying an overall effective duration of approximately 3.0 years. No credit losses were determined to be present as of March 31, 2024, as there was no credit quality deterioration noted. Therefore, no provision for credit losses on securities was recognized for the first quarter of 2024. The following table presents net realized losses on securities available-for-sale for three months ended: Three Months Ended March 31, Securities available-for-sale 2024 2023 Proceeds from sales of securities $ 5,331 $ 66,170 Gross realized gains on securities $ 1 $ - Gross realized losses on securities - (1,675) Net realized gains (losses) $ 1 $ (1,675) Income tax benefit on net realized losses $ - $ 471 Effective tax rate applied 0.0 % 28.1 % As of March 31, 2024, securities valued at $804.9 million were pledged for borrowings, and for other purposes, a decrease from $810.2 million of securities pledged at year-end 2023.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses on Loans	3 Months Ended
Loans and Allowance for Credit Losses on Loans	Mar. 31, 2024
Loans and Allowance for Credit Losses on Loans
Loans and Allowance for Credit Losses on Loans	Note 3 – Loans and Allowance for Credit Losses on Loans Major segments of loans were as follows: March 31, 2024 December 31, 2023 Commercial $ 796,552 $ 841,697 Leases 425,615 398,223 Commercial real estate – investor 1,018,382 1,034,424 Commercial real estate – owner occupied 782,603 796,538 Construction 169,174 165,380 Residential real estate – investor 51,522 52,595 Residential real estate – owner occupied 220,223 226,248 Multifamily 387,479 401,696 HELOC 98,762 103,237 Other 1 19,099 22,915 Total loans 3,969,411 4,042,953 Allowance for credit losses on loans (44,113) (44,264) Net loans 2 $ 3,925,298 $ 3,998,689 1 The “Other” segment includes consumer loans and overdrafts in this table and in subsequent tables within Note 3 – Loans and Allowance for Credit Losses on Loans. 2 Excludes accrued interest receivable of $19.4 million and $20.5 million at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the consolidated balance sheets. It is the policy of the Company to review each prospective credit prior to making a loan in order to determine if an adequate level of security or collateral has been obtained. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to assure access to collateral, in the event of borrower default, through adherence to lending laws, the Company’s lending standards and credit monitoring procedures. Although the Bank makes loans primarily within its market area, there are no significant concentrations of loans where the customers’ ability to honor loan terms is dependent upon a single economic sector. The real estate related categories listed above represent 68.7% and 68.8% of the portfolio at March 31, 2024, and December 31, 2023, respectively, and include a mix of owner occupied and non-owner occupied commercial real estate, residential, construction and multifamily loans. The following tables represent the activity in the allowance for credit losses for loans, or the ACL, for the three months ended March 31, 2024 and 2023: Provision for Beginning (Release of) Ending Allowance for credit losses Balance Credit Losses Charge-offs Recoveries Balance Three months ended March 31, 2024 Commercial $ 3,998 $ 2,326 $ 15 $ 73 $ 6,382 Leases 2,952 (33) - 40 2,959 Commercial real estate – investor 17,105 (902) 16 83 16,270 Commercial real estate – owner occupied 12,280 2,580 3,887 19 10,992 Construction 1,038 59 - - 1,097 Residential real estate – investor 669 (35) - 2 636 Residential real estate – owner occupied 1,821 (169) - 8 1,660 Multifamily 2,728 (135) - - 2,593 HELOC 1,656 (165) - 17 1,508 Other 17 18 70 51 16 Total $ 44,264 $ 3,544 $ 3,988 $ 293 $ 44,113 Provision for Beginning (Release of) Ending Allowance for credit losses Balance Credit Losses Charge-offs Recoveries Balance Three months ended March 31, 2023 Commercial $ 11,968 $ (581) $ 27 $ 151 $ 11,511 Leases 2,865 774 882 9 2,766 Commercial real estate – investor 10,674 4,569 - 17 15,260 Commercial real estate – owner occupied 15,001 573 - 2 15,576 Construction 1,546 (501) - - 1,045 Residential real estate – investor 768 (41) - 19 746 Residential real estate – owner occupied 2,046 (334) - 10 1,722 Multifamily 2,453 212 - - 2,665 HELOC 1,806 (47) - 29 1,788 Other 353 28 113 45 313 Total $ 49,480 $ 4,652 $ 1,022 $ 282 $ 53,392 At March 31, 2024, our allowance for credit losses (“ACL”) on loans totaled $44.1 million, and our ACL on unfunded commitments, included in other liabilities, totaled $2.7 million. During the first three months of 2024, we recorded net provision expense of $3.5 million based on historical loss rate updates driven by higher charge offs in commercial real estate-investor, downward risk rating migration, and our assessment of estimated future credit losses. The ACL on loans excludes $2.7 million, $2.7 million and $3.8 million of allowance for unfunded commitments as of March 31, 2024, December 31, 2023, and March 31, 2023, respectively, recorded within other liabilities. Generally, the Bank considers a loan to be collateral dependent when, based on current information and events, it is probable that foreclosure could be initiated. Additionally, the Bank will review all loans meeting the criteria for individual analysis, to determine if repayment or satisfaction of the loan is expected through the sale of collateral. This will generally be the case for credits with high loan-to-values. Exceptions to this policy would include loans with guarantors or sponsors that have the means and willingness to support the obligation. Non-accruing loans with an outstanding balance of $500,000 or more are assessed on an individual loan level basis. When a financial asset is deemed collateral-dependent, the level of credit loss is measured by the difference between amortized cost of the financial asset and the fair value of collateral adjusted for estimated cost to sell. The Company had $59.3 million and $63.1 million of collateral dependent loans secured by real estate or business assets as of March 31, 2024, and December 31, 2023, respectively. The following tables present the collateral dependent loans and the related ACL allocated by segment of loans as of March 31, 2024 and December 31, 2023: Accounts ACL March 31, 2024 Real Estate Receivable Equipment Other Total Allocation Commercial $ - $ - $ 571 $ 1,354 $ 1,925 $ 1,356 Leases - - - - - - Commercial real estate – investor 16,128 - - - 16,128 3,569 Commercial real estate – owner occupied 30,847 - - - 30,847 1,239 Construction 7,119 - - - 7,119 - Residential real estate – investor 409 - - - 409 - Residential real estate – owner occupied 1,506 - - - 1,506 - Multifamily 1,373 - - - 1,373 - HELOC 39 - - - 39 - Total $ 57,421 $ - $ 571 $ 1,354 $ 59,346 $ 6,164 Accounts ACL December 31, 2023 Real Estate Receivable Equipment Other Total Allocation Commercial $ 837 $ 797 $ - $ - $ 1,634 $ 2 Leases - - 321 - 321 320 Commercial real estate – investor 15,735 - - - 15,735 3,656 Commercial real estate – owner occupied 34,894 - - - 34,894 3,900 Construction 7,162 - - - 7,162 - Residential real estate – investor 422 - - - 422 - Residential real estate – owner occupied 1,506 - - - 1,506 - Multifamily 1,402 - - - 1,402 - HELOC 39 - - - 39 - Total $ 61,997 $ 797 $ 321 $ - $ 63,115 $ 7,878 Aged analysis of past due loans by segments of loans was as follows: 90 days or 90 Days or Greater Past 30-59 Days 60-89 Days Greater Past Total Past Due and March 31, 2024 Past Due Past Due Due Due Current Total Loans Accruing Commercial $ 12,429 $ 703 $ 822 $ 13,954 $ 782,598 $ 796,552 $ 748 Leases 1,108 - 401 1,509 424,106 425,615 - Commercial real estate – investor 434 - 4,966 5,400 1,012,982 1,018,382 - Commercial real estate – owner occupied 971 3,776 22,899 27,646 754,957 782,603 - Construction 4,220 - 7,119 11,339 157,835 169,174 - Residential real estate – investor - 54 249 303 51,219 51,522 - Residential real estate – owner occupied 656 233 2,086 2,975 217,248 220,223 - Multifamily - 304 534 838 386,641 387,479 - HELOC 177 237 268 682 98,080 98,762 41 Other - - - - 19,099 19,099 - Total $ 19,995 $ 5,307 $ 39,344 $ 64,646 $ 3,904,765 $ 3,969,411 $ 789 90 days or 90 Days or Greater Past 30-59 Days 60-89 Days Greater Past Total Past Due and December 31, 2023 Past Due Past Due Due Due Current Total Loans Accruing Commercial $ 982 $ - $ 1,228 $ 2,210 $ 839,487 $ 841,697 $ 1,155 Leases 599 - 347 946 397,277 398,223 - Commercial real estate – investor 1,209 - 6,087 7,296 1,027,128 1,034,424 - Commercial real estate – owner occupied 2,103 3,726 15,645 21,474 775,064 796,538 - Construction 2,540 307 7,161 10,008 155,372 165,380 - Residential real estate – investor 540 579 168 1,287 51,308 52,595 - Residential real estate – owner occupied 553 125 1,944 2,622 223,626 226,248 - Multifamily 1,085 - 233 1,318 400,378 401,696 - HELOC 565 1,396 269 2,230 101,007 103,237 41 Other - 1 - 1 22,914 22,915 - Total $ 10,176 $ 6,134 $ 33,082 $ 49,392 $ 3,993,561 $ 4,042,953 $ 1,196 The table presents all nonaccrual loans as of March 31, 2024, and December 31, 2023: Nonaccrual loan detail March 31, 2024 With no ACL December 31, 2023 With no ACL Commercial $ 1,998 $ 644 $ 870 $ 870 Leases 595 595 639 318 Commercial real estate – investor 16,128 8,568 16,572 8,926 Commercial real estate – owner occupied 30,897 8,271 34,946 8,429 Construction 7,119 7,119 7,162 7,162 Residential real estate – investor 1,299 1,299 1,331 1,331 Residential real estate – owner occupied 3,031 3,031 3,078 3,078 Multifamily 1,959 1,959 1,775 1,775 HELOC 1,298 1,298 1,210 1,210 Other - - - - Total $ 64,324 $ 32,784 $ 67,583 $ 33,099 The Company recognized $34,000 of interest on nonaccrual loans during the three months ended March 31, 2024. Credit Quality Indicators The Company categorizes loans into credit risk categories based on current financial information, overall debt service coverage, comparison to industry averages, historical payment experience, and current economic trends. This analysis includes loans with outstanding balances or commitments greater than $50,000 and excludes homogeneous loans such as home equity lines of credit and residential mortgages. Loans with a classified risk rating are reviewed quarterly regardless of size or loan type. The Company uses the following definitions for classified risk ratings: Special Mention. Substandard. Doubtful. Credits that are not covered by the definitions above are pass credits, which are not considered to be adversely rated. Credit quality indicators by loan segment and loan origination date at March 31, 2024 were as follows: 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial Pass $ 10,284 $ 313,611 $ 125,215 $ 28,810 $ 10,497 $ 19,834 $ 252,098 $ $ 760,349 Special Mention - - 3,598 3,064 111 - 14,187 - 20,960 Substandard - - 4,703 178 - - 10,362 - 15,243 Total commercial 10,284 313,611 133,516 32,052 10,608 19,834 276,647 - 796,552 Leases Pass 61,834 205,567 $ 100,256 36,105 12,450 7,094 - - 423,306 Special Mention - 308 380 1,015 - 11 - - 1,714 Substandard - - 392 203 - - - - 595 Total leases 61,834 205,875 101,028 37,323 12,450 7,105 - - 425,615 Commercial real estate – investor Pass 46,126 200,397 341,405 170,710 94,342 101,984 20,264 - 975,228 Special Mention - - - - - - - - - Substandard - 1,648 4,128 2,796 5,286 17,065 12,231 - 43,154 Total commercial real estate – investor 46,126 202,045 345,533 173,506 99,628 119,049 32,495 - 1,018,382 Commercial real estate – owner occupied Pass 7,877 137,719 151,782 185,939 85,511 124,527 1,828 - 695,183 Special Mention - 1,638 18,249 1,452 3,104 1,710 - - 26,153 Substandard - - 14,647 15,732 13,419 17,469 - - 61,267 Total commercial real estate – owner occupied 7,877 139,357 184,678 203,123 102,034 143,706 1,828 - 782,603 Construction Pass 10,236 42,569 77,717 26,818 95 1,747 2,525 - 161,707 Special Mention - - 348 - - - - - 348 Substandard - - 7,119 - - - - - 7,119 Total construction 10,236 42,569 85,184 26,818 95 1,747 2,525 - 169,174 Residential real estate – investor Pass 1,101 4,925 14,269 8,516 6,137 13,704 1,506 - 50,158 Special Mention - - - 65 - - - - 65 Substandard - - 378 - - 921 - - 1,299 Total residential real estate – investor 1,101 4,925 14,647 8,581 6,137 14,625 1,506 - 51,522 Residential real estate – owner occupied Pass 1,397 31,591 40,203 39,818 24,764 78,480 802 - 217,055 Special Mention - - - - - - - - - Substandard - - - - 189 2,979 - - 3,168 Total residential real estate – owner occupied 1,397 31,591 40,203 39,818 24,953 81,459 802 - 220,223 Multifamily Pass 1,240 75,556 71,322 117,695 51,661 51,998 566 - 370,038 Special Mention - - 164 13,374 311 1,633 - - 15,482 Substandard - - 976 - 214 769 - - 1,959 Total multifamily 1,240 75,556 72,462 131,069 52,186 54,400 566 - 387,479 HELOC Pass 725 2,678 2,534 449 1,545 4,297 84,886 - 97,114 Special Mention - - - - - - - - - Substandard - - 25 - 41 292 1,290 - 1,648 Total HELOC 725 2,678 2,559 449 1,586 4,589 86,176 - 98,762 Other Pass 1,575 3,354 1,601 1,029 127 144 11,269 - 19,099 Special Mention - - - - - - - - - Substandard - - - - - - - - - Total other 1,575 3,354 1,601 1,029 127 144 11,269 - 19,099 Total loans Pass 142,395 1,017,967 926,304 615,889 287,129 403,809 375,744 - 3,769,237 Special Mention - 1,946 22,739 18,970 3,526 3,354 14,187 - 64,722 Substandard - 1,648 32,368 18,909 19,149 39,495 23,883 - 135,452 Total loans $ 142,395 $ 1,021,561 $ 981,411 $ 653,768 $ 309,804 $ 446,658 $ 413,814 $ - $ 3,969,411 Credit quality indicators by loan segment and loan origination date at December 31, 2023, were as follows: 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial Pass $ 318,569 $ 136,668 $ 35,901 $ 11,983 $ 18,390 $ 3,426 $ 298,931 $ 1,408 $ 825,276 Special Mention - 2,737 707 171 - - 4,392 - 8,007 Substandard - 2,099 146 - 199 - 5,970 - 8,414 Total commercial 318,569 141,504 36,754 12,154 18,589 3,426 309,293 1,408 841,697 Leases Pass 219,163 113,074 $ 42,275 14,663 6,975 1,255 - - 397,405 Special Mention - - - - - - - - - Substandard - 407 203 - 208 - - - 818 Total leases 219,163 113,481 42,478 14,663 7,183 1,255 - - 398,223 Commercial real estate – investor Pass 159,654 367,512 218,084 108,384 54,322 63,281 8,122 - 979,359 Special Mention - - 11,267 - - - - - 11,267 Substandard - - 838 5,327 15,658 9,648 12,327 - 43,798 Total commercial real estate – investor 159,654 367,512 230,189 113,711 69,980 72,929 20,449 - 1,034,424 Commercial real estate – owner occupied Pass 124,059 134,383 177,553 103,109 42,839 91,062 33,243 - 706,248 Special Mention 1,650 17,415 9,585 3,128 218 3,681 - - 35,677 Substandard - 14,630 18,817 4,571 14,809 1,786 - - 54,613 Total commercial real estate – owner occupied 125,709 166,428 205,955 110,808 57,866 96,529 33,243 - 796,538 Construction Pass 42,808 66,513 32,942 100 1,593 1,083 3,186 - 148,225 Special Mention - - - - - - - - - Substandard - - - 9,993 - 7,162 - - 17,155 Total construction 42,808 66,513 32,942 10,093 1,593 8,245 3,186 - 165,380 Residential real estate – investor Pass 5,062 14,434 9,027 6,227 6,508 8,469 1,471 - 51,198 Special Mention - - 66 - - - - - 66 Substandard - 390 - - 408 533 - - 1,331 Total residential real estate – investor 5,062 14,824 9,093 6,227 6,916 9,002 1,471 - 52,595 Residential real estate – owner occupied Pass 32,574 41,528 40,335 25,322 14,233 68,277 763 - 223,032 Special Mention - - - - - - - - - Substandard - - - 191 685 2,340 - - 3,216 Total residential real estate – owner occupied 32,574 41,528 40,335 25,513 14,918 70,617 763 - 226,248 Multifamily Pass 55,310 79,060 123,834 72,539 12,231 40,825 562 - 384,361 Special Mention - 168 13,425 322 1,645 - - - 15,560 Substandard - 1,009 - - - 766 - - 1,775 Total multifamily 55,310 80,237 137,259 72,861 13,876 41,591 562 - 401,696 HELOC Pass 2,735 2,679 490 1,757 1,756 2,995 89,161 - 101,573 Special Mention - - - - - - - - - Substandard - 25 1 41 24 184 1,389 - 1,664 Total HELOC 2,735 2,704 491 1,798 1,780 3,179 90,550 - 103,237 Other Pass 4,060 2,278 1,569 153 85 73 14,697 - 22,915 Special Mention - - - - - - - - - Substandard - - - - - - - - - Total other 4,060 2,278 1,569 153 85 73 14,697 - 22,915 Total loans Pass 963,994 958,129 682,010 344,237 158,932 280,746 450,136 1,408 3,839,592 Special Mention 1,650 20,320 35,050 3,621 1,863 3,681 4,392 - 70,577 Substandard - 18,560 20,005 20,123 31,991 22,419 19,686 - 132,784 Total loans $ 965,644 $ 997,009 $ 737,065 $ 367,981 $ 192,786 $ 306,846 $ 474,214 $ 1,408 $ 4,042,953 The gross charge-offs activity by loan type and year of origination for the three months ended March 31, 2024 were as follows: Three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial $ - - - - - 15 $ - $ - $ 15 Commercial real estate – investor - - - - 16 - - - 16 Commercial real estate – owner occupied - - 3,853 - 34 - - 3,887 Other - - - - - 70 - - 70 Total $ - $ - $ - $ 3,853 $ 16 $ 119 - - $ 3,988 The Company had $378,000 and $170,000 in residential real estate loans in the process of foreclosure as of March 31, 2024 and December 31, 2023, respectively. There were six loans modified during the three-month period ending March 31, 2024, totaling $18.6 million in aggregate, which were experiencing financial difficulty. There were three loans modified during the three-month period ending March 31, 2023, totaling $2.8 million in aggregate, which were experiencing financial difficulty. There were no modified loans experiencing financial difficulty in payment default as of March 31, 2024 and March 31, 2023. The following tables present the amortized costs basis of loans at March 31, 2024, and March 31, 2023 that were both experiencing financial difficulty and modified during the period ended March 31, 2024, and March 31, 2023, by class and by type of modification. The percentage of the amortized cost basis of loans that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of financing receivable is also presented below. March 31, 2024 Term Extension Combination - Term Extension and Interest Rate Modification Combination - Term Extension and Payment Modification (1) Total Loans Modified % of Total Loan Segment Modified to Total Loan Segment Commercial $ 247 $ - $ - $ 247 0.0% Commercial real estate – investor - - 1,958 1,958 0.2% Commercial real estate – owner occupied 12,244 3,309 854 16,407 2.1% Total $ 12,491 $ 3,309 $ 2,812 $ 18,612 0.5% March 31, 2023 Term Extension Combination - Term Extension and Interest Rate Modification Combination - Term Extension and Payment Modification (1) Total Loans Modified % of Total Loan Segment Modified to Total Loan Segment Commercial $ - $ 979 $ - $ 979 0.1% Commercial real estate – investor - - 1,774 1,774 0.2% HELOC 20 - - 20 0.0% Total $ 20 $ 979 $ 1,774 $ 2,773 0.1% 1 Payment modifications are either contractual delays in payment or a modification of the payment amount. The Company closely monitors the performance of loan modifications to borrowers experiencing financial difficulty. The following tables present the performance of loans that have been modified as of March 31, 2024 and March 31, 2023. March 31, 2024 30-59 days past due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Modified Commercial $ - $ - $ - $ - $ 247 $ 247 Commercial real estate – investor - - - - 1,958 1,958 Commercial real estate – owner occupied - - - - 16,407 16,407 Total $ - $ - $ - $ - $ 18,612 $ 18,612 March 31, 2023 30-59 days past due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Modified Commercial $ - $ - $ - $ - $ 979 $ 979 Commercial real estate – investor - - - - 1,774 1,774 HELOC - - - - 20 20 Total $ - $ - $ - $ - $ 2,773 $ 2,773 The following tables summarize the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the period ended March 31, 2024, and March 31, 2023. The Company had two loans that had a payment modification as of March 31, 2024. One changed to a single payment at maturity and the other had a reduction of monthly payment until maturity; the financial impact of these modifications is immaterial. As of March 31, 2023, there was one loan that had a payment modification to a single payment at maturity. March 31, 2024 Weighted-Average Term Extension (In Months) Weighted-Average Interest Rate Change Weighted-Average Delay of Payment (In Months) Commercial 4.00 - % - Commercial real estate – investor 24.00 - - Commercial real estate – owner occupied 5.24 0.15 - Total 7.20 0.15 % - March 31, 2023 Weighted-Average Term Extension (In Months) Weighted-Average Interest Rate Change Weighted-Average Delay of Payment (In Months) Commercial 4.00 5.00 % - Commercial real estate – investor 8.00 - 7.00 HELOC 24.00 - - Total 6.71 5.00 % 7.00

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
Other Real Estate Owned	Mar. 31, 2024
Other Real Estate Owned
Other Real Estate Owned	Note 4 – Other Real Estate Owned Details related to the activity in the other real estate owned (“OREO”) portfolio, net of valuation reserve, for the periods presented are itemized in the following table: Three Months Ended March 31, Other real estate owned 2024 2023 Balance at beginning of period $ 5,123 $ 1,561 Property additions, net of acquisition adjustments - 291 Less: Proceeds from property disposals, net of participation purchase and gains/losses - 328 Period valuation write-down - 269 Balance at end of period $ 5,123 $ 1,255 Activity in the valuation allowance was as follows: Three Months Ended March 31, 2024 2023 Balance at beginning of period $ 118 $ 856 Provision for unrealized losses - 269 Reductions taken on sales - (272) Balance at end of period $ 118 $ 853 Expenses related to OREO, net of lease revenue includes: Three Months Ended March 31, 2024 2023 Gain on sales, net $ - $ 28 Provision for unrealized losses - 269 Operating expenses 113 9 Less: Lease revenue 67 - Net OREO expense $ 46 $ 306

Deposits

Deposits	3 Months Ended
Deposits	Mar. 31, 2024
Deposits
Deposits	Note 5 – Deposits Major classifications of deposits were as follows: March 31, 2024 December 31, 2023 Noninterest bearing demand $ 1,799,927 $ 1,834,891 Savings 955,528 971,334 NOW accounts 569,814 565,375 Money market accounts 696,354 671,240 Certificates of deposit of less than $100,000 289,962 266,035 Certificates of deposit of $100,000 through $250,000 205,638 180,289 Certificates of deposit of more than $250,000 91,052 81,582 Total deposits $ 4,608,275 $ 4,570,746

Borrowings

Borrowings	3 Months Ended
Borrowings	Mar. 31, 2024
Borrowings
Borrowings	Note 6 – Borrowings The following table is a summary of borrowings as of March 31, 2024 and December 31, 2023. Junior subordinated debentures are discussed in more detail in Note 7. March 31, 2024 December 31, 2023 Securities sold under repurchase agreements $ 33,546 $ 26,470 Other short-term borrowings 220,000 405,000 Junior subordinated debentures 1 25,773 25,773 Subordinated debentures 59,403 59,382 Total borrowings $ 338,722 $ 516,625 1 See Note 7: Junior Subordinated Debentures. The Company enters into deposit sweep transactions where the transaction amounts are secured by pledged securities. These transactions consistently mature overnight from the transaction date and are governed by sweep repurchase agreements. All sweep repurchase agreements are treated as financings secured by U.S. government agencies and collateralized mortgage-backed securities, and had a carrying amount of $33.5 million at March 31, 2024, and $26.5 million at December 31, 2023. The fair value of the pledged collateral was $45.2 million at March 31, 2024, and $45.7 million at December 31, 2023. At March 31, 2024, there were no customers with secured balances exceeding 10% of stockholders’ equity. The Company’s borrowings at the FHLBC require the Bank to be a member and invest in the stock of the FHLBC. Total borrowings are generally limited to the lower of 35% of total assets or 60% of the book value of certain mortgage loans. As of March 31, 2024, the Bank had $220.0 million in short-term advances outstanding under the FHLBC, and $405.0 million in short-term advances as of December 31, 2023. FHLBC stock held at March 31, 2024 was valued at $13.6 million, and any potential FHLBC advances were collateralized by loans and securities with a principal balance of $1.44 billion, which carried a FHLBC-calculated combined collateral value of $998.9 billion. The Company had excess collateral of $778.9 million available to secure borrowings at March 31, 2024. In the second quarter of 2021, we issued $60.0 million in aggregate principal amount of our 3.50% Fixed-to-Floating Rate Subordinated Notes due April 15, 2031 (the “Notes”). The Company used the net proceeds from the offering for general corporate purposes. The Notes bear interest at a fixed annual rate of 3.50%, from and including the date of issuance to but excluding April 15, 2026, payable semi-annually in arrears. From and including April 15, 2026 to, but excluding the maturity date or early redemption date, the interest rate will reset quarterly to an interest rate per annum equal to three-month Term Secured Overnight Financing Rate (“SOFR”) (as defined by the Note) plus 273 basis points, payable quarterly in arrears. As of March 31, 2024 and December 31, 2023, we had $59.4 million of subordinated debentures outstanding, net of deferred issuance cost. The Company issued senior notes in December 2016 with a ten-year On February 24, 2020, the Company originated a $20.0 million three-year term note with a correspondent bank. The term note was issued at one-month LIBOR plus 175 basis points, and required principal payments quarterly and interest payments monthly. This note was included within Notes payable and other borrowings on the Consolidated Balance Sheets, and the remaining $9.0 million balance of the note was paid off on February 24, 2023. The Company also has an undrawn line of credit of $30.0 million with a correspondent bank to be used for short-term funding needs; advances under this line can be outstanding up to 360 days from the date of issuance. This line of credit has not been utilized since early 2019.

Junior Subordinated Debentures

Junior Subordinated Debentures	3 Months Ended
Junior Subordinated Debentures	Mar. 31, 2024
Junior Subordinated Debentures
Junior Subordinated Debentures	Note 7 – Junior Subordinated Debentures The Company issued $25.0 million of cumulative trust preferred securities through a private placement completed by an unconsolidated subsidiary, Old Second Capital Trust II, in April 2007. These trust preferred securities mature in 30 years, but subject to regulatory approval, can be called in whole or in part on a quarterly basis commencing June 15, 2017. The quarterly cash distributions on the securities were fixed at 6.77% through June 15, 2017, and now have a floating rate of 150 basis points over three-month SOFR. Upon conversion to a floating rate, a cash flow hedge was initiated which resulted in the total interest rate paid on the debt of 4.37% and 4.39% for the quarters ended March 31, 2024 and March 31, 2023, respectively. The Company issued a $25.8 million subordinated debenture to Old Second Capital Trust II in return for the aggregate net proceeds of this trust preferred offering. The interest rate and payment frequency on the debenture are equivalent to the cash distribution basis on the trust preferred securities. The junior subordinated debentures issued by the Company are disclosed on the Consolidated Balance Sheets, and the related interest expense for each issuance is included in the Consolidated Statements of Income. As of March 31, 2024 and December 31, 2023, the remaining unamortized debt issuance costs related to the junior subordinated debentures were less than $1,000 and are included as a reduction to the balance of the junior subordinated debentures on the Consolidated Balance Sheets. The remaining deferred issuance costs on the junior subordinated debentures related to the issuance of Old Second Capital Trust II will be amortized to interest expense over the remainder of the 30-year term of the notes and are included in the Consolidated Statements of Income.

Equity Compensation Plans

Equity Compensation Plans	3 Months Ended
Equity Compensation Plans	Mar. 31, 2024
Equity Compensation Plans
Equity Compensation Plans	Note 8 – Equity Compensation Plans Stock-based awards are outstanding under the Company’s 2019 Equity Incentive Plan, as amended and restated (the “2019 Plan”). The 2019 Plan was originally approved at the May 2019 annual stockholders’ meeting and authorized 600,000 shares, and at the May 2021 annual stockholders’ meeting, the Company obtained stockholder approval to increase the number of shares of common stock authorized for issuance under the 2019 Plan by 1,200,000 shares, from 600,000 shares to 1,800,000 shares. Following the approval of the 2019 Plan, no further awards will be granted under any other prior plan. The 2019 Plan authorizes the granting of qualified stock options, non-qualified stock options, restricted stock, restricted stock units, and stock appreciation rights (“SARs”). Awards may be granted to selected directors, officers, employees or eligible service providers under the 2019 Plan at the discretion of the Compensation Committee of the Company’s Board of Directors. As of March 31, 2024, 712,201 shares remained available for issuance under the 2019 Plan. The Company has granted only restricted stock units under the 2019 Equity Plan. Generally, restricted stock units granted under the 2019 Plan vest three years from the grant date, but the Compensation Committee of the Company’s Board of Directors has discretionary authority to change the terms of particular awards including the vesting schedule. Under the 2019 Plan, unless otherwise provided in an award agreement, upon the occurrence of a change in control, all equity awards then held by the participant will become fully exercisable immediately if, and all stock awards and cash incentive awards will become fully earned and vested immediately if, (i) the 2019 Plan is not an obligation of the successor entity following a change in control or (ii) the 2019 Plan is an obligation of the successor entity following a change in control and the participant incurs a termination of service without cause or for good reason following the change in control. Notwithstanding the immediately preceding sentence, if the vesting of an award is conditioned upon the achievement of performance measures, then such vesting will generally be subject to the following: if, at the time of the change in control, the performance measures are less than 50% attained (pro rata based upon the time of the period through the change in control), the award will become vested and exercisable on a fractional basis with the numerator being equal to the percentage of attainment and the denominator being 50%; and if, at the time of the change in control, the performance measures are at least 50% attained (pro rata based upon the time of the period through the change in control), the award will become fully earned and vested immediately upon the change in control. Awards of restricted stock under the 2019 Plan generally entitle holders to voting and dividend rights upon grant and are subject to forfeiture until certain restrictions have lapsed including employment for a specific period. Awards of restricted stock units under the 2019 Plan are also subject to forfeiture until certain restrictions have lapsed including employment for a specific period, but do not entitle holders to voting rights until the restricted period ends and shares are transferred in connection with the units. There were 338,235 and 230,399 restricted stock units issued under the 2019 Plan during the three months ended March 31, 2024 and March 31, 2023, respectively. Compensation expense is recognized over the vesting period of the restricted stock units based on the market value of the award on the issue date. Total compensation cost that has been recorded for the 2019 Plan was $1.2 million for the three months ended March 31, 2024 and $948,000 for the three months ended March 31, 2023. A summary of changes in the Company’s unvested restricted awards for the three months ended March 31, 2024, is as follows: March 31, 2024 Weighted Restricted Average Stock Shares Grant Date and Units Fair Value Unvested at January 1 709,237 $ 14.26 Granted 338,235 13.44 Vested (204,969) 11.32 Forfeited (3,000) 12.35 Unvested at March 31 839,503 $ 14.65 Total unrecognized compensation cost of restricted awards was $6.9 million as of March 31, 2024, which is expected to be recognized over a weighted-average period of 2.19 years.

Earnings Per Share

Earnings Per Share	3 Months Ended
Earnings Per Share	Mar. 31, 2024
Earnings Per Share
Earnings Per Share	Note 9 – Earnings Per Share The earnings per share, both basic and diluted, are as follows: Three Months Ended March 31, 2024 2023 Basic earnings per share: Weighted-average common shares outstanding 44,758,559 44,619,118 Net income $ 21,312 $ 23,607 Basic earnings per share $ 0.48 $ 0.53 Diluted earnings per share: Weighted-average common shares outstanding 44,758,559 44,619,118 Dilutive effect of unvested restricted awards 1 765,325 697,480 Diluted average common shares outstanding 45,523,884 45,316,598 Net Income $ 21,312 $ 23,607 Diluted earnings per share $ 0.47 $ 0.52 1 Includes the common stock equivalents for restricted share rights that are dilutive.

Regulatory & Capital Matters

Regulatory & Capital Matters	3 Months Ended
Regulatory & Capital Matters	Mar. 31, 2024
Regulatory & Capital Matters
Regulatory & Capital Matters	Note 10 Regulatory & Capital Matters The Bank is subject to the risk-based capital regulatory guidelines, which include the methodology for calculating the risk-weighted Bank assets, developed by the Office of the Comptroller of the Currency (the “OCC”) and the other bank regulatory agencies. In connection with the current risk-based capital regulatory guidelines, the Bank’s Board of Directors has established an internal guideline requiring the Bank to maintain a Tier 1 leverage capital ratio at or above eight percent (8%) and a total risk-based capital ratio at or above twelve percent (12%). At March 31, 2024, the Bank exceeded those thresholds. At March 31, 2024, the Bank’s Tier 1 capital leverage ratio was 10.89%, an increase of 48 basis points from December 31, 2023, and is above the 8.00% objective. The Bank’s total capital ratio was 14.03%, an increase of 79 basis points from December 31, 2023, and also above the objective of 12.00%. Bank holding companies are generally required to maintain minimum levels of capital in accordance with capital guidelines implemented by the Board of Governors of the Federal Reserve System. The general bank and holding company capital adequacy guidelines are shown in the accompanying table, as are the capital ratios of the Company and the Bank, as of March 31, 2024 and December 31, 2023. The Basel III Rules are applicable to all banking organizations that are subject to minimum capital requirements, including federal and state banks and savings and loan associations, as well as to bank and savings and loan holding companies, other than “small bank holding companies,” which are generally holding companies with consolidated assets of less than $3.0 billion. A detailed discussion of the Basel III Rules is included in Part I, Item 1 of the Company’s Form 10-K for the year ended December 31, 2023, under the heading “Supervision and Regulation.” At March 31, 2024 and December 31, 2023, the Company, on a consolidated basis, exceeded the minimum thresholds to be considered “well capitalized” under current regulatory defined capital ratios. Capital levels and industry defined regulatory minimum required levels are as follows: Minimum Capital Well Capitalized Adequacy with Capital Under Prompt Corrective Actual Conservation Buffer, if applicable 1 Action Provisions 2 Amount Ratio Amount Ratio Amount Ratio March 31, 2024 Common equity tier 1 capital to risk weighted assets Consolidated $ 566,730 12.02 % $ 330,042 7.00 % N/A N/A Old Second Bank 614,947 13.06 329,604 7.00 $ 306,061 6.50 % Total capital to risk weighted assets Consolidated 697,211 14.79 494,977 10.50 N/A N/A Old Second Bank 660,429 14.03 494,263 10.50 470,726 10.00 Tier 1 capital to risk weighted assets Consolidated 591,730 12.55 400,773 8.50 N/A N/A Old Second Bank 614,947 13.06 400,233 8.50 376,690 8.00 Tier 1 capital to average assets Consolidated 591,730 10.47 226,067 4.00 N/A N/A Old Second Bank 614,947 10.89 225,876 4.00 282,345 5.00 December 31, 2023 Common equity tier 1 capital to risk weighted assets Consolidated $ 547,721 11.37 % $ 337,207 7.00 % N/A N/A Old Second Bank 592,413 12.32 336,598 7.00 $ 312,556 6.50 % Total capital to risk weighted assets Consolidated 677,076 14.06 505,640 10.50 N/A N/A Old Second Bank 636,768 13.24 504,990 10.50 480,943 10.00 Tier 1 capital to risk weighted assets Consolidated 572,721 11.89 409,430 8.50 N/A N/A Old Second Bank 592,413 12.32 408,727 8.50 384,684 8.00 Tier 1 capital to average assets Consolidated 572,721 10.06 227,722 4.00 N/A N/A Old Second Bank 592,413 10.41 227,632 4.00 284,540 5.00 1 Amounts are shown inclusive of a capital conservation buffer of 2.50%. 2 The prompt corrective action provisions are only applicable at the Bank level. The Bank exceeded the general minimum regulatory requirements to be considered “well capitalized.” As part of its response to the impact of the COVID-19 pandemic, in the first quarter of 2020, U.S. federal regulatory authorities issued an interim final rule that provided banking organizations that adopted the Current Expected Credit Losses (“CECL”) methodology during the 2020 calendar year with the option to delay for two years the estimated impact of CECL on regulatory capital relative to regulatory capital determined under the prior incurred loss methodology, followed by a three-year transition period to phase out the aggregate amount of the capital benefit provided during the initial two-year delay (i.e., a five-year transition in total). In connection with our adoption of CECL on January 1, 2020, we elected to utilize the five-year CECL transition. As of March 31, 2024, the capital measures of the Company exclude $951,000, which is the modified CECL transition adjustment. Dividend Restrictions In addition to the above requirements, banking regulations and capital guidelines generally limit the amount of dividends that may be paid by a bank without prior regulatory approval. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s profits, combined with the retained profit of the previous two years, subject to the capital requirements described above. As of March 31, 2024, the Bank had capacity to pay dividends of $93.7 million to the Company without prior regulatory approval. Pursuant to the Basel III rules, the Bank must keep a capital conservation buffer of 2.50% above the regulatory minimum capital requirements, which must consist entirely of Common Equity Tier 1 capital in order to avoid additional limitations on capital distributions and certain other payments.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2024
Fair Value Measurements
Fair Value Measurements	Note 11 Fair Value Measurements Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy established by the Company also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Three levels of inputs that may be used to measure fair value are: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the Company has the ability to access as of the measurement date. Level 2: Significant observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, and other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a company’s own view about the assumptions that market participants would use in pricing an asset or liability. There were no transfers between levels at March 31, 2024, however the Company reclassified one states and political subdivisions security to an asset-backed security in all periods presented. During the three-month period ended March 31, 2023, $14.9 million of asset-backed securities and $6.8 million of collateralized mortgage obligations were transferred to Level 2 from Level 3. The majority of securities available-for-sale are valued by external pricing services or dealer market participants and are classified in Level 2 of the fair value hierarchy. Both market and income valuation approaches are utilized. Quarterly, the Company evaluates the methodologies used by the external pricing services or dealer market participants to develop the fair values to determine whether the results of the valuations are representative of an exit price in the Company’s principal markets and an appropriate representation of fair value. The Company uses the following methods and significant assumptions to estimate fair value: ● Government-sponsored agency debt securities are primarily priced using available market information through processes such as benchmark spreads, market valuations of like securities, like securities groupings and matrix pricing. ● Other government-sponsored agency securities, Mortgage Backed Securities (“MBS”) and some of the actively traded real estate mortgage investment conduits and collateralized mortgage obligations are priced using available market information including benchmark yields, prepayment speeds, spreads, volatility of similar securities and trade date. ● State and political subdivisions are largely grouped by characteristics (e.g., geographical data and source of revenue in trade dissemination systems). Because some securities are not traded daily and due to other grouping limitations, active market quotes are often obtained using benchmarking for like securities. ● Auction rate securities are priced using market spreads, cash flows, prepayment speeds, and loss analytics. Therefore, the valuations of auction rate asset-backed securities are considered Level 2 valuations. ● Asset-backed collateralized loan obligations were priced using data from a pricing matrix supported by our bond accounting service provider and are therefore considered Level 2 valuations. ● Annually every security holding is priced by a pricing service independent of the regular and recurring pricing services used. The independent service provides a measurement to indicate if the price assigned by the regular service is within or outside of a reasonable range. Management reviews this report and applies judgment in adjusting calculations at year end related to securities pricing. ● Residential mortgage loans available for sale in the secondary market are carried at fair market value. The fair value of loans held-for-sale is determined using quoted secondary market prices. ● Lending related commitments to fund certain residential mortgage loans, e.g., residential mortgage loans with locked interest rates to be sold in the secondary market and forward commitments for the future delivery of mortgage loans to third party investors, as well as forward commitments for future delivery of MBS, are considered derivatives. Fair values are estimated based on observable changes in mortgage interest rates including prices for MBS from the date of the commitment and do not typically involve significant judgments by management. ● The fair value of mortgage servicing rights is based on a valuation model that calculates the present value of estimated net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income to derive the resultant value. The Company is able to compare the valuation model inputs, such as the discount rate, prepayment speeds, weighted average delinquency and foreclosure/bankruptcy rates to widely available published industry data for reasonableness. ● Interest rate swap positions, both assets and liabilities, are based on valuation pricing models using an income approach reflecting readily observable market parameters such as interest rate yield curves. ● The fair value of individually evaluated loans with specific allocations of the allowance for credit losses is essentially based on recent real estate appraisals or the fair value of the collateralized asset. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are made in the appraisal process by the appraisers to reflect differences between the available comparable sales and income data. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. ● Nonrecurring adjustments to certain commercial and residential real estate properties classified as other real estate owned (“OREO”) are measured at fair value, less costs to sell. Fair values are based on third party appraisals of the property, resulting in a Level 3 classification, or an executed pending sales contract. In cases where the carrying amount exceeds the fair value, less costs to sell, a valuation loss is recognized. Assets and Liabilities Measured at Fair Value on a Recurring Basis The tables below present the balance of assets and liabilities at March 31, 2024 and December 31, 2023, respectively, measured by the Company at fair value on a recurring basis: March 31, 2024 Level 1 Level 2 Level 3 Total Assets: Securities available-for-sale U.S. Treasury $ 171,000 $ - $ - $ 171,000 U.S. government agencies - 56,979 - 56,979 U.S. government agencies mortgage-backed - 101,075 - 101,075 States and political subdivisions - 209,839 12,903 222,742 Collateralized mortgage obligations - 379,603 - 379,603 Asset-backed securities - 64,222 2,485 66,707 Collateralized loan obligations - 170,691 - 170,691 Loans held-for-sale - 1,072 - 1,072 Mortgage servicing rights - - 10,564 10,564 Interest rate swap agreements, including risk participation agreement - 6,001 - 6,001 Mortgage banking derivatives - 49 - 49 Total $ 171,000 $ 989,531 $ 25,952 $ 1,186,483 Liabilities: Interest rate swap agreements, including risk participation agreements $ - $ 8,917 $ - $ 8,917 Total $ - $ 8,917 $ - $ 8,917 December 31, 2023 Level 1 Level 2 Level 3 Total Assets: Securities available-for-sale U.S. Treasury $ 169,574 $ - $ - $ 169,574 U.S. government agencies - 56,959 - 56,959 U.S. government agencies mortgage-backed - 106,370 - 106,370 States and political subdivisions - 214,006 13,059 227,065 Collateralized mortgage obligations - 392,544 - 392,544 Asset-backed securities - 66,166 2,270 68,436 Collateralized loan obligations - 171,881 - 171,881 Loans held-for-sale - 1,322 - 1,322 Mortgage servicing rights - - 10,344 10,344 Interest rate swap agreements - 5,391 - 5,391 Mortgage banking derivatives - (10) - (10) Total $ 169,574 $ 1,014,629 $ 25,673 $ 1,209,876 Liabilities: Interest rate swap agreements, including risk participation agreements $ - $ 8,324 $ - $ 8,324 Total $ - $ 8,324 $ - $ 8,324 The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are as follows: Three Months Ended March 31, 2024 Securities available-for-sale States and Mortgage Asset-backed Political Servicing Securities Subdivisions Rights Beginning balance January 1, 2024 $ 2,270 $ 13,059 $ 10,344 Transfers out of Level 3 - - - Total gains or losses Included in earnings - (33) 172 Included in other comprehensive income (29) (89) - Purchases, issuances, sales, and settlements Purchases 259 - - Issuances - - 126 Settlements (15) (34) (78) Ending balance March 31, 2024 $ 2,485 $ 12,903 $ 10,564 Three Months Ended March 31, 2023 Securities available-for-sale Collateralized States and Mortgage Asset-backed Mortgage Political Servicing Securities Obligations Subdivisions Rights Beginning balance January 1, 2023 $ 16,741 $ 6,770 $ 12,501 $ 11,189 Transfers into Level 3 - - - - Transfers out of Level 3 (14,885) (6,764) - - Total gains or losses Included in earnings (11) - (34) (471) Included in other comprehensive income 219 (6) 430 - Purchases, issuances, sales, and settlements Purchases 406 - - - Issuances - - - 120 Settlements (355) - (33) (54) Ending balance March 31, 2023 $ 2,115 $ - $ 12,864 $ 10,784 The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as of March 31, 2024: Weighted Measured at fair value Significant Unobservable Average on a recurring basis: Fair Value Valuation Methodology Inputs Range of Input of Inputs States and political subdivisions $ 12,903 Discounted Cash Flow Discount Rate 3.2 – 3.7% 3.5 % Liquidity Premium 0.5 – 0.5% 0.5 % Asset-backed securities $ 2,485 Discounted Cash Flow Discount Rate 5.5 - 5.5% 5.5 % Mortgage servicing rights $ 10,564 Discounted Cash Flow Discount Rate 9.0 – 11.0% 9.0 % Prepayment Speed 5.2 – 31.5% 6.1 % The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as December 31, 2023: Weighted Measured at fair value Significant Unobservable Average on a recurring basis: Fair Value Valuation Methodology Inputs Range of Input of Inputs States and political subdivisions $ 13,059 Discounted Cash Flow Discount Rate 3.2– 5.4% 4.7 % Liquidity Premium 0.5 - 0.5% 0.5 % Asset-backed securities $ 2,270 Discounted Cash Flow Discount Rate 5.6 - 5.6% 5.6 % Mortgage servicing rights $ 10,344 Discounted Cash Flow Discount Rate 9.0 – 11.0% 9.0 % Prepayment Speed 5.1 - 33.0% 6.6 % Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis: The Company may be required, from time to time, to measure certain other assets at fair value on a nonrecurring basis in accordance with GAAP. These assets consist of individually evaluated loans and OREO. For assets measured at fair value on a nonrecurring basis at March 31, 2024 and December 31, 2023, respectively, the following tables provide the level of valuation assumptions used to determine each valuation and the carrying value of the related assets: March 31, 2024 Level 1 Level 2 Level 3 Total Individually evaluated loans 1 $ - $ - $ 53,182 $ 53,182 Other real estate owned, net 2 - - 5,123 5,123 Total $ - $ - $ 58,305 $ 58,305 1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, which had a carrying amount of $59.3 million and a valuation allowance of $6.2 million resulting in a decrease of specific allocations within the allowance for credit losses on loans of $4.9 million for the three months ended March 31, 2024. 2 OREO is measured at fair value, less costs to sell, and had a net carrying amount of $5.1 million at March 31, 2024, which is made up of the outstanding balance of $5.2 million, net of a valuation allowance of $118,000 December 31, 2023 Level 1 Level 2 Level 3 Total Individually evaluated loans 1 $ - $ - $ 66,180 $ 66,180 Other real estate owned, net 2 - - 5,123 5,123 Total $ - $ - $ 71,303 $ 71,303 1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, which had a carrying amount of $77.3 million and a valuation allowance of $11.1 million resulting in a decrease of specific allocations within the allowance for credit losses on loans of $6.5 million for the year December 31, 2023. 2 OREO is measured at fair value, less costs to sell, and had a net carrying amount of $5.1 million at December 31, 2023, which is made up of the outstanding balance of $5.2 million, net of a valuation allowance of $118,000 . The Company has estimated the fair values of these assets based primarily on Level 3 inputs. OREO and individually evaluated loans are generally valued using the fair value of collateral provided by third party appraisals. These valuations include assumptions related to cash flow projections, discount rates, and recent comparable sales. The numerical ranges of unobservable inputs for these valuation assumptions are not meaningful.

Fair Values of Financial Instru

Fair Values of Financial Instruments	3 Months Ended
Fair Values of Financial Instruments	Mar. 31, 2024
Fair Values of Financial Instruments
Fair Values of Financial Instruments	Note 12 – Fair Values of Financial Instruments The estimated fair values approximate carrying amount for all items except those described in the following table. Securities available-for-sale fair values are based upon market prices or dealer quotes, and if no such information is available, on the rate and term of the security. The carrying value of FHLBC stock approximates fair value as the stock is nonmarketable and can only be sold to the FHLBC or another member institution at par. At March 31, 2024 and December 31, 2023, the fair values of loans are estimated on an exit price basis incorporating discounts for credit, liquidity and marketability factors. The fair value of time deposits was estimated using discounted future cash flows at current rates offered for deposits of similar remaining maturities. The fair values of borrowings were estimated based on interest rates available to the Company for debt with similar terms and remaining maturities. The fair value of off balance sheet volume was not considered material. The carrying amount and estimated fair values of financial instruments were as follows: March 31, 2024 Carrying Fair Amount Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 48,841 $ 48,841 $ 48,841 $ - $ - Interest earning deposits with financial institutions 49,253 49,253 49,253 - - Securities available-for-sale 1,168,797 1,168,797 171,000 982,409 15,388 FHLBC and FRBC stock 28,518 28,518 - 28,518 - Loans held-for-sale 1,072 1,072 - 1,072 - Net loans 3,925,298 3,841,563 - - 3,841,563 Mortgage servicing rights 10,564 10,564 10,564 Interest rate swap agreements 5,947 5,947 - 5,947 - Interest rate lock commitments and forward contracts 49 49 - 49 - Interest receivable on securities and loans 25,735 25,735 - 25,735 - Financial liabilities: Noninterest bearing deposits $ 1,799,927 $ 1,799,927 $ 1,799,927 $ - $ - Interest bearing deposits 2,808,348 2,798,825 - 2,798,825 - Securities sold under repurchase agreements 33,546 33,546 - 33,546 - Other short-term borrowings 220,000 220,000 - 220,000 - Junior subordinated debentures 25,773 20,619 - 20,619 - Subordinated debentures 59,403 49,797 - 49,797 - Interest rate swap agreements 8,917 8,917 - 8,917 - Interest payable on deposits and borrowings 3,617 3,617 - 3,617 - December 31, 2023 Carrying Fair Amount Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 55,534 $ 55,534 $ 55,534 $ - $ - Interest earning deposits with financial institutions 44,611 44,611 44,611 - - Securities available-for-sale 1,192,829 1,192,829 169,574 1,007,926 15,329 FHLBC and FRBC stock 33,355 33,355 - 33,355 - Loans held-for-sale 1,322 1,322 - 1,322 - Net loans 3,998,689 3,876,381 - - 3,876,381 Mortgage servicing rights 10,344 10,344 10,344 Interest rate swap agreements 5,302 5,302 - 5,302 - Interest rate lock commitments and forward contracts (10) (10) - (10) - Interest receivable on securities and loans 27,159 27,159 - 27,159 - Financial liabilities: Noninterest bearing deposits $ 1,834,891 $ 1,834,891 $ 1,834,891 $ - $ - Interest bearing deposits 2,735,855 2,726,223 - 2,726,223 - Securities sold under repurchase agreements 26,470 26,470 - 26,470 - Junior subordinated debentures 405,000 405,000 - 405,000 - Subordinated debentures 25,773 20,361 - 20,361 - Senior notes 59,382 47,982 47,982 Interest rate swap agreements 8,234 8,324 - 8,324 - Interest payable on deposits and borrowings 2,962 2,962 - 2,962 -

Derivatives, Hedging Activities

Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk	3 Months Ended
	Mar. 31, 2024
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions	Note 13 – Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk Risk Management Objective of Using Derivatives The Company is exposed to certain risk arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loan portfolio. Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest income and expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. The aggregate fair value of the swaps is recorded in other assets or other liabilities with changes in fair value recorded in other comprehensive income, net of tax. The amount included in other comprehensive income would be reclassified to current earnings should all or a portion of the hedge no longer be considered effective. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income and subsequently reclassified into interest income or interest expense in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest income or expense as interest payments are received on the variable rate loan pools or paid on the Company’s fixed-rate borrowings. Interest rate swaps with notional amounts totaling $300.0 million as of March 31, 2024, and December 31, 2023, were designated as cash flow hedges of certain variable rate commercial and commercial real estate loan pools. Each of these hedges were executed to pay variable and receive fixed rate cash flows. Each of these hedges was determined to be effective during all periods presented and the Company expects the hedges to remain effective during the remaining terms of the swaps. An interest rate swap with a notional amount of $25.8 million as of March 31, 2024 and December 31, 2023, is designated as a cash flow hedge of junior subordinated debentures and was executed to pay fixed and receive variable rate cash flows. The hedge was determined to be effective during all periods presented and the Company expects the hedge to remain effective during the remaining terms of the swap. During the next twelve months, the Company estimates that an additional $5.5 million will be reclassified as an increase to interest income and an additional $609,000 will be reclassified as an increase to interest expense. Non-designated Hedges Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. The notional amounts of interest rate swaps with its loan customers as of March 31, 2024 and December 31, 2023 were $107.0 million and $104.8 million, respectively. Those interest rate swaps are simultaneously hedged by offsetting derivatives that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate derivatives associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer derivatives and the offsetting derivatives are recognized directly in earnings. At March 31, 2024 and December 31, 2023, the Company had $6.6 million and $7.3 million of cash collateral pledged with two correspondent financial institutions, respectively. The Company held $5.7 million and $4.1 million of cash pledged from one correspondent financial institution to support the interest rate swap activity during the periods presented, respectively. No investment securities were required to be pledged to any correspondent financial institution during 2024 through March 31, 2024, or during 2023. The Company offsets derivative assets and liabilities that are subject to a master netting arrangement. The Company also grants mortgage loan interest rate lock commitments to borrowers, subject to normal loan underwriting standards. The interest rate risk associated with these loan interest rate lock commitments is managed with contracts for future deliveries of loans as well as selling forward mortgage-backed securities contracts. Loan interest rate lock commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The notional amount of these commitments at March 31, 2024 and December 31, 2023 was $9.5 million and $8.4 million, respectively. Commitments to originate residential mortgage loans held-for-sale and forward commitments to sell residential mortgage loans or forward MBS contracts are considered derivative instruments and changes in the fair value are recorded to mortgage banking revenue. Fair values are estimated based on observable changes in mortgage interest rates including mortgage-backed securities prices from the date of the commitment. The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023. Fair Value of Derivative Instruments March 31, 2024 No. of Trans. Notional Amount $ Balance Sheet Location Fair Value $ Balance Sheet Location Fair Value $ Derivatives designated as hedging instruments Interest rate swap agreements 5 325,774 Other Assets 3,361 Other Liabilities 6,331 Total derivatives designated as hedging instruments 3,361 6,331 Derivatives not designated as hedging instruments Interest rate swaps with commercial loan customers 16 106,958 Other Assets 2,586 Other Liabilities 2,586 Interest rate lock commitments and forward contracts 38 9,487 Other Assets 49 Other Liabilities - Other contracts 4 46,687 Other Assets 54 Other Liabilities - Total derivatives not designated as hedging instruments 2,689 2,586 December 31, 2023 No. of Trans. Notional Amount $ Balance Sheet Location Fair Value $ Balance Sheet Location Fair Value $ Derivatives designated as hedging instruments Interest rate swap agreements 5 325,774 Other Assets 2,576 Other Liabilities 5,598 Total derivatives designated as hedging instruments 2,576 5,598 Derivatives not designated as hedging instruments Interest rate swaps with commercial loan customers 17 104,777 Other Assets 2,726 Other Liabilities 2,726 Interest rate lock commitments and forward contracts 24 8,375 Other Assets (10) Other Liabilities - Other contracts 4 44,790 Other Assets 89 Other Liabilities - Total derivatives not designated as hedging instruments 2,805 2,726 Disclosure of the Effect of Fair Value and Cash Flow Hedge Accounting The fair value and cash flow hedge accounting related to derivatives covered under ASC Subtopic 815-20 impacted Accumulated Other Comprehensive Income (“AOCI”) and the Income Statement. The loss recognized in AOCI on derivatives totaled $2.1 million as of March 31, 2024, and $3.1 million as of March 31, 2023. The amount of the loss reclassified from AOCI to net interest income on the income statement was $1.6 million for the three months ended March 31, 2024 and $1.0 million for the three months ended March 31, 2023. Credit-risk-related Contingent Features For derivative transactions involving counterparties who are lending customers of the Company, the derivative credit exposure is managed through the normal credit review and monitoring process, which may include collateralization, financial covenants and/or financial guarantees of affiliated parties. Agreements with such customers require that losses associated with derivative transactions receive payment priority from any funds recovered should a customer default and ultimate disposition of collateral or guarantees occur. Credit exposure to broker/dealer counterparties is managed through agreements with each derivative counterparty that require collateralization of fair value gains owed by such counterparties. Some small degree of credit exposure exists due to timing differences between when a gain may occur and the subsequent point in time that collateral is delivered to secure that gain. This is monitored by the Company and procedures are in place to minimize this exposure. Such agreements also require the Company to collateralize counterparties in circumstances wherein the fair value of the derivatives result in loss to the Company. Other provisions of such agreements include the definition of certain events that may lead to the declaration of default and/or the early termination of the derivative transaction(s): ● If the Company either defaults or is capable of being declared in default on any of its indebtedness (exclusive of deposit obligations), then the Company could also be declared in default on its derivative obligations. ● If a merger occurs that materially changes the Company's creditworthiness in an adverse manner. ● If certain specified adverse regulatory actions occur, such as the issuance of a Cease and Desist Order, or citations for actions considered Unsafe and Unsound or that may lead to the termination of deposit insurance coverage by the FDIC. The Bank also issues letters of credit, which are conditional commitments that guarantee the performance of a customer to a third party. The credit risk involved and collateral obtained in issuing letters of credit are essentially the same as that involved in extending loan commitments to our customers. In addition to customer related commitments, the Company is responsible for letters of credit commitments that relate to properties held in OREO. The following table represents the Company’s contractual commitments due to letters of credit as of March 31, 2024, and December 31, 2023. The following table is a summary of letter of credit commitments: March 31, 2024 December 31, 2023 Fixed Variable Total Fixed Variable Total Letters of credit: Borrower: Financial standby $ 229 $ 17,276 $ 17,505 $ 173 $ 16,621 $ 16,794 Performance standby 562 12,344 12,906 562 13,689 14,251 791 29,620 30,411 735 30,310 31,045 Non-borrower: Performance standby - 67 67 - 67 67 Total letters of credit $ 791 $ 29,687 $ 30,478 $ 735 $ 30,377 $ 31,112 Unused loan commitments: $ 148,769 $ 629,544 $ 778,313 $ 140,305 $ 694,960 $ 835,265 As of March 31, 2024, the Company evaluated current market conditions, including any impacts related to market interest rate changes and unused line of credit utilization trends during the first quarter of 2024, and based on that analysis under the CECL methodology, the Company determined credit losses related to unfunded commitments totaled $2.7 million. The resultant decrease in the ACL for unfunded commitments of $44,000 for the first quarter of 2024, compared to the prior quarter end, is primarily related adjustments to historical benchmark assumptions, such as the funding rates and the period used to forecast those rates within the ACL calculation. The Company will continue to assess the credit risk at least quarterly, and adjust the allowance for unfunded commitments, which is carried within other liabilities on our Consolidated Balance Sheets, as needed, with the appropriate offsetting entry to the provision for credit losses on our Consolidated Statements of Income.

Basis of Presentation and Cha_2

Basis of Presentation and Changes in Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Basis of Presentation and Changes in Significant Accounting Policies
Recent Accounting Pronouncements	Recent Accounting Pronouncements The following is a summary of recent accounting pronouncements that have impacted or could potentially affect the Company : ASU 2023-06 ASU 2023-09 ASU 2024-01 – ASU 2024-02 –
Subsequent Events	Subsequent Events On April 16, 2024, our Board of Directors declared a cash dividend of $0.05 per share of common stock payable on May 6, 2024, to stockholders of record as of April 26, 2024; dividends of $2.2 million were paid to stockholders on May 6, 2024.

Securities (Tables)

Securities (Tables)	3 Months Ended
Securities (Tables)	Mar. 31, 2024
Securities
Schedule of amortized cost and fair value of the securities portfolio and corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive loss	Gross Gross Amortized Unrealized Unrealized Fair March 31, 2024 Cost 1 Gains Losses Value Securities available-for-sale U.S. Treasury $ 174,712 $ - $ (3,712) $ 171,000 U.S. government agencies 59,829 - (2,850) 56,979 U.S. government agencies mortgage-backed 114,061 - (12,986) 101,075 States and political subdivisions 233,343 682 (11,283) 222,742 Collateralized mortgage obligations 431,084 272 (51,753) 379,603 Asset-backed securities 69,666 37 (2,996) 66,707 Collateralized loan obligations 171,131 52 (492) 170,691 Total securities available-for-sale $ 1,253,826 $ 1,043 $ (86,072) $ 1,168,797 Gross Gross Amortized Unrealized Unrealized Fair December 31, 2023 Cost 1 Gains Losses Value Securities available-for-sale U.S. Treasury $ 174,602 $ - $ (5,028) $ 169,574 U.S. government agencies 60,011 - (3,052) 56,959 U.S. government agencies mortgage-backed 118,492 - (12,122) 106,370 States and political subdivisions 236,072 1,325 (10,332) 227,065 Collateralized mortgage obligations 442,987 421 (50,864) 392,544 Asset-backed securities 71,616 42 (3,222) 68,436 Collateralized loan obligations 173,201 30 (1,350) 171,881 Total securities available-for-sale $ 1,276,981 $ 1,818 $ (85,970) $ 1,192,829 1 Excludes accrued interest receivable of $6.3 million and $6.6 million at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the consolidated balance sheets.
Schedule of fair value, amortized cost and weighted average yield of debt securities by contractual maturity along with securities not due at a single maturity date, primarily mortgage-backed securities (MBS), asset-backed securities, and collateralized loan obligations	Weighted Amortized Average Fair Securities available-for-sale Cost Yield Value Due in one year or less $ 197,825 1.05 % $ 193,861 Due after one year through five years 53,675 1.92 50,940 Due after five years through ten years 56,283 2.77 51,681 Due after ten years 160,101 3.11 154,239 467,884 2.06 450,721 Mortgage-backed and collateralized mortgage obligations 545,145 2.43 480,678 Asset-backed securities 69,666 4.06 66,707 Collateralized loan obligations 171,131 6.84 170,691 Total securities available-for-sale $ 1,253,826 2.99 % $ 1,168,797
Schedule of securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position	Less than 12 months 12 months or more March 31, 2024 in an unrealized loss position in an unrealized loss position Total Number of Unrealized Fair Number of Unrealized Fair Number of Unrealized Fair Securities available-for-sale Securities Losses Value Securities Losses Value Securities Losses Value U.S. Treasuries - $ - $ - 4 $ 3,712 $ 171,000 4 $ 3,712 $ 171,000 U.S. government agencies - - - 9 2,850 56,979 9 2,850 56,979 U.S. government agencies mortgage-backed - - - 128 12,986 101,075 128 12,986 101,075 States and political subdivisions 20 299 63,127 35 10,984 126,955 55 11,283 190,082 Collateralized mortgage obligations - - - 144 51,753 364,263 144 51,753 364,263 Asset-backed securities - - - 18 2,996 60,864 18 2,996 60,864 Collateralized loan obligations 2 7 10,396 15 485 99,070 17 492 109,466 Total securities available-for-sale 22 $ 306 $ 73,523 353 $ 85,766 $ 980,206 375 $ 86,072 $ 1,053,729 Less than 12 months 12 months or more December 31, 2023 in an unrealized loss position in an unrealized loss position Total Number of Unrealized Fair Number of Unrealized Fair Number of Unrealized Fair Securities available-for-sale Securities Losses Value Securities Losses Value Securities Losses Value U.S. Treasuries - $ - $ - 4 $ 5,028 $ 169,574 4 $ 5,028 $ 169,574 U.S. government agencies - - - 9 3,052 56,959 9 3,052 56,959 U.S. government agencies mortgage-backed - - - 128 12,122 106,370 128 12,122 106,370 States and political subdivisions 12 137 27,974 25 10,195 106,138 37 10,332 134,112 Collateralized mortgage obligations 2 8 734 143 50,856 376,236 145 50,864 376,970 Asset-backed securities - - - 19 3,222 63,941 19 3,222 63,941 Collateralized loan obligations - - - 25 1,350 150,902 25 1,350 150,902 Total securities available-for-sale 14 $ 145 $ 28,708 353 $ 85,825 $ 1,030,120 367 $ 85,970 $ 1,058,828
Schedule of proceeds from sale and gross realized gains and losses on sale of securities	Three Months Ended March 31, Securities available-for-sale 2024 2023 Proceeds from sales of securities $ 5,331 $ 66,170 Gross realized gains on securities $ 1 $ - Gross realized losses on securities - (1,675) Net realized gains (losses) $ 1 $ (1,675) Income tax benefit on net realized losses $ - $ 471 Effective tax rate applied 0.0 % 28.1 %

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses on Loans (Tables)	3 Months Ended
Loans and Allowance for Credit Losses on Loans (Tables)	Mar. 31, 2024
Loans and Allowance for Credit Losses on Loans
Schedule of major classifications of loans	March 31, 2024 December 31, 2023 Commercial $ 796,552 $ 841,697 Leases 425,615 398,223 Commercial real estate – investor 1,018,382 1,034,424 Commercial real estate – owner occupied 782,603 796,538 Construction 169,174 165,380 Residential real estate – investor 51,522 52,595 Residential real estate – owner occupied 220,223 226,248 Multifamily 387,479 401,696 HELOC 98,762 103,237 Other 1 19,099 22,915 Total loans 3,969,411 4,042,953 Allowance for credit losses on loans (44,113) (44,264) Net loans 2 $ 3,925,298 $ 3,998,689 1 The “Other” segment includes consumer loans and overdrafts in this table and in subsequent tables within Note 3 – Loans and Allowance for Credit Losses on Loans. 2 Excludes accrued interest receivable of $19.4 million and $20.5 million at March 31, 2024 and December 31, 2023, respectively, that is recorded in other assets on the consolidated balance sheets.
Schedule of changes in the allowance for loan losses by segment of loans based on method of impairment	Provision for Beginning (Release of) Ending Allowance for credit losses Balance Credit Losses Charge-offs Recoveries Balance Three months ended March 31, 2024 Commercial $ 3,998 $ 2,326 $ 15 $ 73 $ 6,382 Leases 2,952 (33) - 40 2,959 Commercial real estate – investor 17,105 (902) 16 83 16,270 Commercial real estate – owner occupied 12,280 2,580 3,887 19 10,992 Construction 1,038 59 - - 1,097 Residential real estate – investor 669 (35) - 2 636 Residential real estate – owner occupied 1,821 (169) - 8 1,660 Multifamily 2,728 (135) - - 2,593 HELOC 1,656 (165) - 17 1,508 Other 17 18 70 51 16 Total $ 44,264 $ 3,544 $ 3,988 $ 293 $ 44,113 Provision for Beginning (Release of) Ending Allowance for credit losses Balance Credit Losses Charge-offs Recoveries Balance Three months ended March 31, 2023 Commercial $ 11,968 $ (581) $ 27 $ 151 $ 11,511 Leases 2,865 774 882 9 2,766 Commercial real estate – investor 10,674 4,569 - 17 15,260 Commercial real estate – owner occupied 15,001 573 - 2 15,576 Construction 1,546 (501) - - 1,045 Residential real estate – investor 768 (41) - 19 746 Residential real estate – owner occupied 2,046 (334) - 10 1,722 Multifamily 2,453 212 - - 2,665 HELOC 1,806 (47) - 29 1,788 Other 353 28 113 45 313 Total $ 49,480 $ 4,652 $ 1,022 $ 282 $ 53,392
Schedule of collateral dependent loans and related loan allowances.	Accounts ACL March 31, 2024 Real Estate Receivable Equipment Other Total Allocation Commercial $ - $ - $ 571 $ 1,354 $ 1,925 $ 1,356 Leases - - - - - - Commercial real estate – investor 16,128 - - - 16,128 3,569 Commercial real estate – owner occupied 30,847 - - - 30,847 1,239 Construction 7,119 - - - 7,119 - Residential real estate – investor 409 - - - 409 - Residential real estate – owner occupied 1,506 - - - 1,506 - Multifamily 1,373 - - - 1,373 - HELOC 39 - - - 39 - Total $ 57,421 $ - $ 571 $ 1,354 $ 59,346 $ 6,164 Accounts ACL December 31, 2023 Real Estate Receivable Equipment Other Total Allocation Commercial $ 837 $ 797 $ - $ - $ 1,634 $ 2 Leases - - 321 - 321 320 Commercial real estate – investor 15,735 - - - 15,735 3,656 Commercial real estate – owner occupied 34,894 - - - 34,894 3,900 Construction 7,162 - - - 7,162 - Residential real estate – investor 422 - - - 422 - Residential real estate – owner occupied 1,506 - - - 1,506 - Multifamily 1,402 - - - 1,402 - HELOC 39 - - - 39 - Total $ 61,997 $ 797 $ 321 $ - $ 63,115 $ 7,878
Schedule of aged analysis of past due loans by class of loans	90 days or 90 Days or Greater Past 30-59 Days 60-89 Days Greater Past Total Past Due and March 31, 2024 Past Due Past Due Due Due Current Total Loans Accruing Commercial $ 12,429 $ 703 $ 822 $ 13,954 $ 782,598 $ 796,552 $ 748 Leases 1,108 - 401 1,509 424,106 425,615 - Commercial real estate – investor 434 - 4,966 5,400 1,012,982 1,018,382 - Commercial real estate – owner occupied 971 3,776 22,899 27,646 754,957 782,603 - Construction 4,220 - 7,119 11,339 157,835 169,174 - Residential real estate – investor - 54 249 303 51,219 51,522 - Residential real estate – owner occupied 656 233 2,086 2,975 217,248 220,223 - Multifamily - 304 534 838 386,641 387,479 - HELOC 177 237 268 682 98,080 98,762 41 Other - - - - 19,099 19,099 - Total $ 19,995 $ 5,307 $ 39,344 $ 64,646 $ 3,904,765 $ 3,969,411 $ 789 90 days or 90 Days or Greater Past 30-59 Days 60-89 Days Greater Past Total Past Due and December 31, 2023 Past Due Past Due Due Due Current Total Loans Accruing Commercial $ 982 $ - $ 1,228 $ 2,210 $ 839,487 $ 841,697 $ 1,155 Leases 599 - 347 946 397,277 398,223 - Commercial real estate – investor 1,209 - 6,087 7,296 1,027,128 1,034,424 - Commercial real estate – owner occupied 2,103 3,726 15,645 21,474 775,064 796,538 - Construction 2,540 307 7,161 10,008 155,372 165,380 - Residential real estate – investor 540 579 168 1,287 51,308 52,595 - Residential real estate – owner occupied 553 125 1,944 2,622 223,626 226,248 - Multifamily 1,085 - 233 1,318 400,378 401,696 - HELOC 565 1,396 269 2,230 101,007 103,237 41 Other - 1 - 1 22,914 22,915 - Total $ 10,176 $ 6,134 $ 33,082 $ 49,392 $ 3,993,561 $ 4,042,953 $ 1,196
Schedule of loans on nonaccrual for which there was no related allowance	Nonaccrual loan detail March 31, 2024 With no ACL December 31, 2023 With no ACL Commercial $ 1,998 $ 644 $ 870 $ 870 Leases 595 595 639 318 Commercial real estate – investor 16,128 8,568 16,572 8,926 Commercial real estate – owner occupied 30,897 8,271 34,946 8,429 Construction 7,119 7,119 7,162 7,162 Residential real estate – investor 1,299 1,299 1,331 1,331 Residential real estate – owner occupied 3,031 3,031 3,078 3,078 Multifamily 1,959 1,959 1,775 1,775 HELOC 1,298 1,298 1,210 1,210 Other - - - - Total $ 64,324 $ 32,784 $ 67,583 $ 33,099
Schedule of credit quality indicators by class of loans	Credit quality indicators by loan segment and loan origination date at March 31, 2024 were as follows: 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial Pass $ 10,284 $ 313,611 $ 125,215 $ 28,810 $ 10,497 $ 19,834 $ 252,098 $ $ 760,349 Special Mention - - 3,598 3,064 111 - 14,187 - 20,960 Substandard - - 4,703 178 - - 10,362 - 15,243 Total commercial 10,284 313,611 133,516 32,052 10,608 19,834 276,647 - 796,552 Leases Pass 61,834 205,567 $ 100,256 36,105 12,450 7,094 - - 423,306 Special Mention - 308 380 1,015 - 11 - - 1,714 Substandard - - 392 203 - - - - 595 Total leases 61,834 205,875 101,028 37,323 12,450 7,105 - - 425,615 Commercial real estate – investor Pass 46,126 200,397 341,405 170,710 94,342 101,984 20,264 - 975,228 Special Mention - - - - - - - - - Substandard - 1,648 4,128 2,796 5,286 17,065 12,231 - 43,154 Total commercial real estate – investor 46,126 202,045 345,533 173,506 99,628 119,049 32,495 - 1,018,382 Commercial real estate – owner occupied Pass 7,877 137,719 151,782 185,939 85,511 124,527 1,828 - 695,183 Special Mention - 1,638 18,249 1,452 3,104 1,710 - - 26,153 Substandard - - 14,647 15,732 13,419 17,469 - - 61,267 Total commercial real estate – owner occupied 7,877 139,357 184,678 203,123 102,034 143,706 1,828 - 782,603 Construction Pass 10,236 42,569 77,717 26,818 95 1,747 2,525 - 161,707 Special Mention - - 348 - - - - - 348 Substandard - - 7,119 - - - - - 7,119 Total construction 10,236 42,569 85,184 26,818 95 1,747 2,525 - 169,174 Residential real estate – investor Pass 1,101 4,925 14,269 8,516 6,137 13,704 1,506 - 50,158 Special Mention - - - 65 - - - - 65 Substandard - - 378 - - 921 - - 1,299 Total residential real estate – investor 1,101 4,925 14,647 8,581 6,137 14,625 1,506 - 51,522 Residential real estate – owner occupied Pass 1,397 31,591 40,203 39,818 24,764 78,480 802 - 217,055 Special Mention - - - - - - - - - Substandard - - - - 189 2,979 - - 3,168 Total residential real estate – owner occupied 1,397 31,591 40,203 39,818 24,953 81,459 802 - 220,223 Multifamily Pass 1,240 75,556 71,322 117,695 51,661 51,998 566 - 370,038 Special Mention - - 164 13,374 311 1,633 - - 15,482 Substandard - - 976 - 214 769 - - 1,959 Total multifamily 1,240 75,556 72,462 131,069 52,186 54,400 566 - 387,479 HELOC Pass 725 2,678 2,534 449 1,545 4,297 84,886 - 97,114 Special Mention - - - - - - - - - Substandard - - 25 - 41 292 1,290 - 1,648 Total HELOC 725 2,678 2,559 449 1,586 4,589 86,176 - 98,762 Other Pass 1,575 3,354 1,601 1,029 127 144 11,269 - 19,099 Special Mention - - - - - - - - - Substandard - - - - - - - - - Total other 1,575 3,354 1,601 1,029 127 144 11,269 - 19,099 Total loans Pass 142,395 1,017,967 926,304 615,889 287,129 403,809 375,744 - 3,769,237 Special Mention - 1,946 22,739 18,970 3,526 3,354 14,187 - 64,722 Substandard - 1,648 32,368 18,909 19,149 39,495 23,883 - 135,452 Total loans $ 142,395 $ 1,021,561 $ 981,411 $ 653,768 $ 309,804 $ 446,658 $ 413,814 $ - $ 3,969,411 Credit quality indicators by loan segment and loan origination date at December 31, 2023, were as follows: 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial Pass $ 318,569 $ 136,668 $ 35,901 $ 11,983 $ 18,390 $ 3,426 $ 298,931 $ 1,408 $ 825,276 Special Mention - 2,737 707 171 - - 4,392 - 8,007 Substandard - 2,099 146 - 199 - 5,970 - 8,414 Total commercial 318,569 141,504 36,754 12,154 18,589 3,426 309,293 1,408 841,697 Leases Pass 219,163 113,074 $ 42,275 14,663 6,975 1,255 - - 397,405 Special Mention - - - - - - - - - Substandard - 407 203 - 208 - - - 818 Total leases 219,163 113,481 42,478 14,663 7,183 1,255 - - 398,223 Commercial real estate – investor Pass 159,654 367,512 218,084 108,384 54,322 63,281 8,122 - 979,359 Special Mention - - 11,267 - - - - - 11,267 Substandard - - 838 5,327 15,658 9,648 12,327 - 43,798 Total commercial real estate – investor 159,654 367,512 230,189 113,711 69,980 72,929 20,449 - 1,034,424 Commercial real estate – owner occupied Pass 124,059 134,383 177,553 103,109 42,839 91,062 33,243 - 706,248 Special Mention 1,650 17,415 9,585 3,128 218 3,681 - - 35,677 Substandard - 14,630 18,817 4,571 14,809 1,786 - - 54,613 Total commercial real estate – owner occupied 125,709 166,428 205,955 110,808 57,866 96,529 33,243 - 796,538 Construction Pass 42,808 66,513 32,942 100 1,593 1,083 3,186 - 148,225 Special Mention - - - - - - - - - Substandard - - - 9,993 - 7,162 - - 17,155 Total construction 42,808 66,513 32,942 10,093 1,593 8,245 3,186 - 165,380 Residential real estate – investor Pass 5,062 14,434 9,027 6,227 6,508 8,469 1,471 - 51,198 Special Mention - - 66 - - - - - 66 Substandard - 390 - - 408 533 - - 1,331 Total residential real estate – investor 5,062 14,824 9,093 6,227 6,916 9,002 1,471 - 52,595 Residential real estate – owner occupied Pass 32,574 41,528 40,335 25,322 14,233 68,277 763 - 223,032 Special Mention - - - - - - - - - Substandard - - - 191 685 2,340 - - 3,216 Total residential real estate – owner occupied 32,574 41,528 40,335 25,513 14,918 70,617 763 - 226,248 Multifamily Pass 55,310 79,060 123,834 72,539 12,231 40,825 562 - 384,361 Special Mention - 168 13,425 322 1,645 - - - 15,560 Substandard - 1,009 - - - 766 - - 1,775 Total multifamily 55,310 80,237 137,259 72,861 13,876 41,591 562 - 401,696 HELOC Pass 2,735 2,679 490 1,757 1,756 2,995 89,161 - 101,573 Special Mention - - - - - - - - - Substandard - 25 1 41 24 184 1,389 - 1,664 Total HELOC 2,735 2,704 491 1,798 1,780 3,179 90,550 - 103,237 Other Pass 4,060 2,278 1,569 153 85 73 14,697 - 22,915 Special Mention - - - - - - - - - Substandard - - - - - - - - - Total other 4,060 2,278 1,569 153 85 73 14,697 - 22,915 Total loans Pass 963,994 958,129 682,010 344,237 158,932 280,746 450,136 1,408 3,839,592 Special Mention 1,650 20,320 35,050 3,621 1,863 3,681 4,392 - 70,577 Substandard - 18,560 20,005 20,123 31,991 22,419 19,686 - 132,784 Total loans $ 965,644 $ 997,009 $ 737,065 $ 367,981 $ 192,786 $ 306,846 $ 474,214 $ 1,408 $ 4,042,953
Schedule of gross charge-offs	Three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans Converted To Term Loans Total Commercial $ - - - - - 15 $ - $ - $ 15 Commercial real estate – investor - - - - 16 - - - 16 Commercial real estate – owner occupied - - 3,853 - 34 - - 3,887 Other - - - - - 70 - - 70 Total $ - $ - $ - $ 3,853 $ 16 $ 119 - - $ 3,988
Schedule of class of financing receivable	March 31, 2024 Term Extension Combination - Term Extension and Interest Rate Modification Combination - Term Extension and Payment Modification (1) Total Loans Modified % of Total Loan Segment Modified to Total Loan Segment Commercial $ 247 $ - $ - $ 247 0.0% Commercial real estate – investor - - 1,958 1,958 0.2% Commercial real estate – owner occupied 12,244 3,309 854 16,407 2.1% Total $ 12,491 $ 3,309 $ 2,812 $ 18,612 0.5% March 31, 2023 Term Extension Combination - Term Extension and Interest Rate Modification Combination - Term Extension and Payment Modification (1) Total Loans Modified % of Total Loan Segment Modified to Total Loan Segment Commercial $ - $ 979 $ - $ 979 0.1% Commercial real estate – investor - - 1,774 1,774 0.2% HELOC 20 - - 20 0.0% Total $ 20 $ 979 $ 1,774 $ 2,773 0.1% 1 Payment modifications are either contractual delays in payment or a modification of the payment amount. March 31, 2024 30-59 days past due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Modified Commercial $ - $ - $ - $ - $ 247 $ 247 Commercial real estate – investor - - - - 1,958 1,958 Commercial real estate – owner occupied - - - - 16,407 16,407 Total $ - $ - $ - $ - $ 18,612 $ 18,612 March 31, 2023 30-59 days past due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Modified Commercial $ - $ - $ - $ - $ 979 $ 979 Commercial real estate – investor - - - - 1,774 1,774 HELOC - - - - 20 20 Total $ - $ - $ - $ - $ 2,773 $ 2,773 March 31, 2024 Weighted-Average Term Extension (In Months) Weighted-Average Interest Rate Change Weighted-Average Delay of Payment (In Months) Commercial 4.00 - % - Commercial real estate – investor 24.00 - - Commercial real estate – owner occupied 5.24 0.15 - Total 7.20 0.15 % - March 31, 2023 Weighted-Average Term Extension (In Months) Weighted-Average Interest Rate Change Weighted-Average Delay of Payment (In Months) Commercial 4.00 5.00 % - Commercial real estate – investor 8.00 - 7.00 HELOC 24.00 - - Total 6.71 5.00 % 7.00

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
Other Real Estate Owned (Tables)	Mar. 31, 2024
Other Real Estate Owned
Schedule of activity in the other real estate owned (OREO) portfolio, net of valuation reserve	Three Months Ended March 31, Other real estate owned 2024 2023 Balance at beginning of period $ 5,123 $ 1,561 Property additions, net of acquisition adjustments - 291 Less: Proceeds from property disposals, net of participation purchase and gains/losses - 328 Period valuation write-down - 269 Balance at end of period $ 5,123 $ 1,255
Schedule of activity in valuation allowance	Three Months Ended March 31, 2024 2023 Balance at beginning of period $ 118 $ 856 Provision for unrealized losses - 269 Reductions taken on sales - (272) Balance at end of period $ 118 $ 853
Schedule of expenses related to foreclosed assets, net of lease revenue	Three Months Ended March 31, 2024 2023 Gain on sales, net $ - $ 28 Provision for unrealized losses - 269 Operating expenses 113 9 Less: Lease revenue 67 - Net OREO expense $ 46 $ 306

Deposits (Tables)

Deposits (Tables)	3 Months Ended
Deposits (Tables)	Mar. 31, 2024
Deposits
Schedule of major classifications of deposits	March 31, 2024 December 31, 2023 Noninterest bearing demand $ 1,799,927 $ 1,834,891 Savings 955,528 971,334 NOW accounts 569,814 565,375 Money market accounts 696,354 671,240 Certificates of deposit of less than $100,000 289,962 266,035 Certificates of deposit of $100,000 through $250,000 205,638 180,289 Certificates of deposit of more than $250,000 91,052 81,582 Total deposits $ 4,608,275 $ 4,570,746

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
Borrowings (Tables)	Mar. 31, 2024
Borrowings
Summary of borrowings and junior subordinated debentures	March 31, 2024 December 31, 2023 Securities sold under repurchase agreements $ 33,546 $ 26,470 Other short-term borrowings 220,000 405,000 Junior subordinated debentures 1 25,773 25,773 Subordinated debentures 59,403 59,382 Total borrowings $ 338,722 $ 516,625

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	3 Months Ended
Equity Compensation Plans (Tables)	Mar. 31, 2024
Equity Compensation Plans
Summary of changes in nonvested shares of restricted share rights	March 31, 2024 Weighted Restricted Average Stock Shares Grant Date and Units Fair Value Unvested at January 1 709,237 $ 14.26 Granted 338,235 13.44 Vested (204,969) 11.32 Forfeited (3,000) 12.35 Unvested at March 31 839,503 $ 14.65

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
Earnings Per Share (Tables)	Mar. 31, 2024
Earnings Per Share
Schedule of Earnings Per Share	Three Months Ended March 31, 2024 2023 Basic earnings per share: Weighted-average common shares outstanding 44,758,559 44,619,118 Net income $ 21,312 $ 23,607 Basic earnings per share $ 0.48 $ 0.53 Diluted earnings per share: Weighted-average common shares outstanding 44,758,559 44,619,118 Dilutive effect of unvested restricted awards 1 765,325 697,480 Diluted average common shares outstanding 45,523,884 45,316,598 Net Income $ 21,312 $ 23,607 Diluted earnings per share $ 0.47 $ 0.52 1 Includes the common stock equivalents for restricted share rights that are dilutive.

Regulatory & Capital Matters (T

Regulatory & Capital Matters (Tables)	3 Months Ended
Regulatory & Capital Matters (Tables)	Mar. 31, 2024
Regulatory & Capital Matters
Schedule of capital levels and industry defined regulatory minimum required levels	Minimum Capital Well Capitalized Adequacy with Capital Under Prompt Corrective Actual Conservation Buffer, if applicable 1 Action Provisions 2 Amount Ratio Amount Ratio Amount Ratio March 31, 2024 Common equity tier 1 capital to risk weighted assets Consolidated $ 566,730 12.02 % $ 330,042 7.00 % N/A N/A Old Second Bank 614,947 13.06 329,604 7.00 $ 306,061 6.50 % Total capital to risk weighted assets Consolidated 697,211 14.79 494,977 10.50 N/A N/A Old Second Bank 660,429 14.03 494,263 10.50 470,726 10.00 Tier 1 capital to risk weighted assets Consolidated 591,730 12.55 400,773 8.50 N/A N/A Old Second Bank 614,947 13.06 400,233 8.50 376,690 8.00 Tier 1 capital to average assets Consolidated 591,730 10.47 226,067 4.00 N/A N/A Old Second Bank 614,947 10.89 225,876 4.00 282,345 5.00 December 31, 2023 Common equity tier 1 capital to risk weighted assets Consolidated $ 547,721 11.37 % $ 337,207 7.00 % N/A N/A Old Second Bank 592,413 12.32 336,598 7.00 $ 312,556 6.50 % Total capital to risk weighted assets Consolidated 677,076 14.06 505,640 10.50 N/A N/A Old Second Bank 636,768 13.24 504,990 10.50 480,943 10.00 Tier 1 capital to risk weighted assets Consolidated 572,721 11.89 409,430 8.50 N/A N/A Old Second Bank 592,413 12.32 408,727 8.50 384,684 8.00 Tier 1 capital to average assets Consolidated 572,721 10.06 227,722 4.00 N/A N/A Old Second Bank 592,413 10.41 227,632 4.00 284,540 5.00 1 Amounts are shown inclusive of a capital conservation buffer of 2.50%. 2 The prompt corrective action provisions are only applicable at the Bank level. The Bank exceeded the general minimum regulatory requirements to be considered “well capitalized.”

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
Fair Value Measurements (Tables)	Mar. 31, 2024
Fair Value Measurements
Schedule of balance of assets and liabilities which are measured at fair value on a recurring basis	March 31, 2024 Level 1 Level 2 Level 3 Total Assets: Securities available-for-sale U.S. Treasury $ 171,000 $ - $ - $ 171,000 U.S. government agencies - 56,979 - 56,979 U.S. government agencies mortgage-backed - 101,075 - 101,075 States and political subdivisions - 209,839 12,903 222,742 Collateralized mortgage obligations - 379,603 - 379,603 Asset-backed securities - 64,222 2,485 66,707 Collateralized loan obligations - 170,691 - 170,691 Loans held-for-sale - 1,072 - 1,072 Mortgage servicing rights - - 10,564 10,564 Interest rate swap agreements, including risk participation agreement - 6,001 - 6,001 Mortgage banking derivatives - 49 - 49 Total $ 171,000 $ 989,531 $ 25,952 $ 1,186,483 Liabilities: Interest rate swap agreements, including risk participation agreements $ - $ 8,917 $ - $ 8,917 Total $ - $ 8,917 $ - $ 8,917 December 31, 2023 Level 1 Level 2 Level 3 Total Assets: Securities available-for-sale U.S. Treasury $ 169,574 $ - $ - $ 169,574 U.S. government agencies - 56,959 - 56,959 U.S. government agencies mortgage-backed - 106,370 - 106,370 States and political subdivisions - 214,006 13,059 227,065 Collateralized mortgage obligations - 392,544 - 392,544 Asset-backed securities - 66,166 2,270 68,436 Collateralized loan obligations - 171,881 - 171,881 Loans held-for-sale - 1,322 - 1,322 Mortgage servicing rights - - 10,344 10,344 Interest rate swap agreements - 5,391 - 5,391 Mortgage banking derivatives - (10) - (10) Total $ 169,574 $ 1,014,629 $ 25,673 $ 1,209,876 Liabilities: Interest rate swap agreements, including risk participation agreements $ - $ 8,324 $ - $ 8,324 Total $ - $ 8,324 $ - $ 8,324
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis are as follows: Three Months Ended March 31, 2024 Securities available-for-sale States and Mortgage Asset-backed Political Servicing Securities Subdivisions Rights Beginning balance January 1, 2024 $ 2,270 $ 13,059 $ 10,344 Transfers out of Level 3 - - - Total gains or losses Included in earnings - (33) 172 Included in other comprehensive income (29) (89) - Purchases, issuances, sales, and settlements Purchases 259 - - Issuances - - 126 Settlements (15) (34) (78) Ending balance March 31, 2024 $ 2,485 $ 12,903 $ 10,564 Three Months Ended March 31, 2023 Securities available-for-sale Collateralized States and Mortgage Asset-backed Mortgage Political Servicing Securities Obligations Subdivisions Rights Beginning balance January 1, 2023 $ 16,741 $ 6,770 $ 12,501 $ 11,189 Transfers into Level 3 - - - - Transfers out of Level 3 (14,885) (6,764) - - Total gains or losses Included in earnings (11) - (34) (471) Included in other comprehensive income 219 (6) 430 - Purchases, issuances, sales, and settlements Purchases 406 - - - Issuances - - - 120 Settlements (355) - (33) (54) Ending balance March 31, 2023 $ 2,115 $ - $ 12,864 $ 10,784
Schedule of quantitative information about level 3 fair value measurements	The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as of March 31, 2024: Weighted Measured at fair value Significant Unobservable Average on a recurring basis: Fair Value Valuation Methodology Inputs Range of Input of Inputs States and political subdivisions $ 12,903 Discounted Cash Flow Discount Rate 3.2 – 3.7% 3.5 % Liquidity Premium 0.5 – 0.5% 0.5 % Asset-backed securities $ 2,485 Discounted Cash Flow Discount Rate 5.5 - 5.5% 5.5 % Mortgage servicing rights $ 10,564 Discounted Cash Flow Discount Rate 9.0 – 11.0% 9.0 % Prepayment Speed 5.2 – 31.5% 6.1 % The following table and commentary present quantitative and qualitative information about Level 3 fair value measurements as December 31, 2023: Weighted Measured at fair value Significant Unobservable Average on a recurring basis: Fair Value Valuation Methodology Inputs Range of Input of Inputs States and political subdivisions $ 13,059 Discounted Cash Flow Discount Rate 3.2– 5.4% 4.7 % Liquidity Premium 0.5 - 0.5% 0.5 % Asset-backed securities $ 2,270 Discounted Cash Flow Discount Rate 5.6 - 5.6% 5.6 % Mortgage servicing rights $ 10,344 Discounted Cash Flow Discount Rate 9.0 – 11.0% 9.0 % Prepayment Speed 5.1 - 33.0% 6.6 %
Schedule of assets measured at fair value on a nonrecurring basis	March 31, 2024 Level 1 Level 2 Level 3 Total Individually evaluated loans 1 $ - $ - $ 53,182 $ 53,182 Other real estate owned, net 2 - - 5,123 5,123 Total $ - $ - $ 58,305 $ 58,305 1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, which had a carrying amount of $59.3 million and a valuation allowance of $6.2 million resulting in a decrease of specific allocations within the allowance for credit losses on loans of $4.9 million for the three months ended March 31, 2024. 2 OREO is measured at fair value, less costs to sell, and had a net carrying amount of $5.1 million at March 31, 2024, which is made up of the outstanding balance of $5.2 million, net of a valuation allowance of $118,000 December 31, 2023 Level 1 Level 2 Level 3 Total Individually evaluated loans 1 $ - $ - $ 66,180 $ 66,180 Other real estate owned, net 2 - - 5,123 5,123 Total $ - $ - $ 71,303 $ 71,303 1 Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, which had a carrying amount of $77.3 million and a valuation allowance of $11.1 million resulting in a decrease of specific allocations within the allowance for credit losses on loans of $6.5 million for the year December 31, 2023. 2 OREO is measured at fair value, less costs to sell, and had a net carrying amount of $5.1 million at December 31, 2023, which is made up of the outstanding balance of $5.2 million, net of a valuation allowance of $118,000 .

Fair Values of Financial Inst_2

Fair Values of Financial Instruments (Tables)	3 Months Ended
Fair Values of Financial Instruments (Tables)	Mar. 31, 2024
Fair Values of Financial Instruments
Schedule of carrying amount and estimated fair values of financial instruments	March 31, 2024 Carrying Fair Amount Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 48,841 $ 48,841 $ 48,841 $ - $ - Interest earning deposits with financial institutions 49,253 49,253 49,253 - - Securities available-for-sale 1,168,797 1,168,797 171,000 982,409 15,388 FHLBC and FRBC stock 28,518 28,518 - 28,518 - Loans held-for-sale 1,072 1,072 - 1,072 - Net loans 3,925,298 3,841,563 - - 3,841,563 Mortgage servicing rights 10,564 10,564 10,564 Interest rate swap agreements 5,947 5,947 - 5,947 - Interest rate lock commitments and forward contracts 49 49 - 49 - Interest receivable on securities and loans 25,735 25,735 - 25,735 - Financial liabilities: Noninterest bearing deposits $ 1,799,927 $ 1,799,927 $ 1,799,927 $ - $ - Interest bearing deposits 2,808,348 2,798,825 - 2,798,825 - Securities sold under repurchase agreements 33,546 33,546 - 33,546 - Other short-term borrowings 220,000 220,000 - 220,000 - Junior subordinated debentures 25,773 20,619 - 20,619 - Subordinated debentures 59,403 49,797 - 49,797 - Interest rate swap agreements 8,917 8,917 - 8,917 - Interest payable on deposits and borrowings 3,617 3,617 - 3,617 - December 31, 2023 Carrying Fair Amount Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 55,534 $ 55,534 $ 55,534 $ - $ - Interest earning deposits with financial institutions 44,611 44,611 44,611 - - Securities available-for-sale 1,192,829 1,192,829 169,574 1,007,926 15,329 FHLBC and FRBC stock 33,355 33,355 - 33,355 - Loans held-for-sale 1,322 1,322 - 1,322 - Net loans 3,998,689 3,876,381 - - 3,876,381 Mortgage servicing rights 10,344 10,344 10,344 Interest rate swap agreements 5,302 5,302 - 5,302 - Interest rate lock commitments and forward contracts (10) (10) - (10) - Interest receivable on securities and loans 27,159 27,159 - 27,159 - Financial liabilities: Noninterest bearing deposits $ 1,834,891 $ 1,834,891 $ 1,834,891 $ - $ - Interest bearing deposits 2,735,855 2,726,223 - 2,726,223 - Securities sold under repurchase agreements 26,470 26,470 - 26,470 - Junior subordinated debentures 405,000 405,000 - 405,000 - Subordinated debentures 25,773 20,361 - 20,361 - Senior notes 59,382 47,982 47,982 Interest rate swap agreements 8,234 8,324 - 8,324 - Interest payable on deposits and borrowings 2,962 2,962 - 2,962 -

Derivatives, Hedging Activiti_2

Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk (Tables)	3 Months Ended
	Mar. 31, 2024
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Schedule of fair value of derivative financial instruments as well as their classification on the Balance Sheet	March 31, 2024 No. of Trans. Notional Amount $ Balance Sheet Location Fair Value $ Balance Sheet Location Fair Value $ Derivatives designated as hedging instruments Interest rate swap agreements 5 325,774 Other Assets 3,361 Other Liabilities 6,331 Total derivatives designated as hedging instruments 3,361 6,331 Derivatives not designated as hedging instruments Interest rate swaps with commercial loan customers 16 106,958 Other Assets 2,586 Other Liabilities 2,586 Interest rate lock commitments and forward contracts 38 9,487 Other Assets 49 Other Liabilities - Other contracts 4 46,687 Other Assets 54 Other Liabilities - Total derivatives not designated as hedging instruments 2,689 2,586 December 31, 2023 No. of Trans. Notional Amount $ Balance Sheet Location Fair Value $ Balance Sheet Location Fair Value $ Derivatives designated as hedging instruments Interest rate swap agreements 5 325,774 Other Assets 2,576 Other Liabilities 5,598 Total derivatives designated as hedging instruments 2,576 5,598 Derivatives not designated as hedging instruments Interest rate swaps with commercial loan customers 17 104,777 Other Assets 2,726 Other Liabilities 2,726 Interest rate lock commitments and forward contracts 24 8,375 Other Assets (10) Other Liabilities - Other contracts 4 44,790 Other Assets 89 Other Liabilities - Total derivatives not designated as hedging instruments 2,805 2,726
Schedule of financial instrument commitments	March 31, 2024 December 31, 2023 Fixed Variable Total Fixed Variable Total Letters of credit: Borrower: Financial standby $ 229 $ 17,276 $ 17,505 $ 173 $ 16,621 $ 16,794 Performance standby 562 12,344 12,906 562 13,689 14,251 791 29,620 30,411 735 30,310 31,045 Non-borrower: Performance standby - 67 67 - 67 67 Total letters of credit $ 791 $ 29,687 $ 30,478 $ 735 $ 30,377 $ 31,112 Unused loan commitments: $ 148,769 $ 629,544 $ 778,313 $ 140,305 $ 694,960 $ 835,265

Summary of Significant Accounti

Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Oct. 17, 2023
Goodwill and Core Deposit Intangible
Amortization of core deposit intangibles	$ 580	$ 624
Cash dividend declared (per share)			$ 0.05

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($)
Securities Available-for-Sale
Amortized Cost	$ 1,253,826	$ 1,276,981
Gross Unrealized Gains	1,043	1,818
Gross Unrealized Losses	(86,072)	(85,970)
Securities available-for-sale	1,168,797	1,192,829
Accrued interest receivable	6,300	6,600
FHLB and FRB Stock
FHLBC stock	13,600	18,500
FRBC stock	14,900	14,900
Securities pledged to secure deposits and for other purposes	804,900	810,200
Other disclosures
Securities available-for-sale	$ 1,168,797	1,192,829
Number of securities issued from originators \| item	0
Number of originators \| item	1
Minimum percentage of securities investment	10%
U.S. Treasury
Securities Available-for-Sale
Amortized Cost	$ 174,712	174,602
Gross Unrealized Losses	(3,712)	(5,028)
Securities available-for-sale	171,000	169,574
Other disclosures
Securities available-for-sale	171,000	169,574
U.S. government agencies
Securities Available-for-Sale
Amortized Cost	59,829	60,011
Gross Unrealized Losses	(2,850)	(3,052)
Securities available-for-sale	56,979	56,959
Other disclosures
Securities available-for-sale	56,979	56,959
U.S. government agencies mortgage-backed
Securities Available-for-Sale
Amortized Cost	114,061	118,492
Gross Unrealized Losses	(12,986)	(12,122)
Securities available-for-sale	101,075	106,370
Other disclosures
Securities available-for-sale	101,075	106,370
States and political subdivisions
Securities Available-for-Sale
Amortized Cost	233,343	236,072
Gross Unrealized Gains	682	1,325
Gross Unrealized Losses	(11,283)	(10,332)
Securities available-for-sale	222,742	227,065
Other disclosures
Securities available-for-sale	222,742	227,065
Collateralized mortgage obligations
Securities Available-for-Sale
Amortized Cost	431,084	442,987
Gross Unrealized Gains	272	421
Gross Unrealized Losses	(51,753)	(50,864)
Securities available-for-sale	379,603	392,544
Other disclosures
Securities available-for-sale	379,603	392,544
Asset-backed Securities
Securities Available-for-Sale
Amortized Cost	69,666	71,616
Gross Unrealized Gains	37	42
Gross Unrealized Losses	(2,996)	(3,222)
Securities available-for-sale	66,707	68,436
Other disclosures
Securities available-for-sale	66,707	68,436
Collateralized loan obligations.
Securities Available-for-Sale
Amortized Cost	171,131	173,201
Gross Unrealized Gains	52	30
Gross Unrealized Losses	(492)	(1,350)
Securities available-for-sale	170,691	171,881
Other disclosures
Securities available-for-sale	$ 170,691	$ 171,881

Securities - Contractual Maturi

Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Securities Available-for-Sale, Amortized Cost
Due in one year or less	$ 197,825
Due after one year through five years	53,675
Due after five years through ten years	56,283
Due after ten years	160,101
Debt securities excluding securities not due at a single maturity date	467,884
Total	$ 1,253,826	$ 1,276,981
Securities Available-for-Sale, Weighted Average Yield
Due in one year or less (as a percent)	1.05%
Due after one year through five years (as a percent)	1.92%
Due after five years through ten years (as a percent)	2.77%
Due after ten years (as a percent)	3.11%
Debt securities (as a percent)	2.06%
Total (as a percent)	2.99%
Securities Available-for-Sale, Fair Value
Due in one year or less	$ 193,861
Due after one year through five years	50,940
Due after five years through ten years	51,681
Due after ten years	154,239
Debt securities	450,721
Debt Securities, Available-for-sale, Total	1,168,797	1,192,829
Mortgage-backed and collateralized mortgage obligations
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	$ 545,145
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	2.43%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 480,678
Asset-backed Securities
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	69,666
Total	$ 69,666	71,616
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	4.06%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 66,707
Debt Securities, Available-for-sale, Total	66,707	68,436
Collateralized loan obligations.
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	171,131
Total	$ 171,131	173,201
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	6.84%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 170,691
Debt Securities, Available-for-sale, Total	$ 170,691	$ 171,881

Securities - Unrealized Loss Po

Securities - Unrealized Loss Positions (Details)	3 Months Ended
Securities - Unrealized Loss Positions (Details)	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Securities Available-for-Sale, Number of Securities
Less than 12 months in an unrealized loss position \| security	22	14
Greater than 12 months in an unrealized loss position \| security	353	353
Total	375	367
Securities Available-for-Sale, Unrealized Losses
Less than 12 months in an unrealized loss position	$ 306,000	$ 145,000
Greater than 12 months in an unrealized loss position	85,766,000	85,825,000
Total	86,072,000	85,970,000
Securities Available-for-Sale, Fair Value
Less than 12 months in an unrealized loss position	73,523,000	28,708,000
Greater than 12 months in an unrealized loss position	980,206,000	1,030,120,000
Total	$ 1,053,729,000	1,058,828,000
Effective duration (in years)	3 years
Credit losses were determined	$ 0	$ 0
Provision for credit losses on securities	$ 0
U.S. Treasury
Securities Available-for-Sale, Number of Securities
Greater than 12 months in an unrealized loss position \| security	4	4
Total	4	4
Securities Available-for-Sale, Unrealized Losses
Greater than 12 months in an unrealized loss position	$ 3,712,000	$ 5,028,000
Total	3,712,000	5,028,000
Securities Available-for-Sale, Fair Value
Greater than 12 months in an unrealized loss position	171,000,000	169,574,000
Total	$ 171,000,000	$ 169,574,000
U.S. government agencies
Securities Available-for-Sale, Number of Securities
Greater than 12 months in an unrealized loss position \| security	9	9
Total	9	9
Securities Available-for-Sale, Unrealized Losses
Greater than 12 months in an unrealized loss position	$ 2,850,000	$ 3,052,000
Total	2,850,000	3,052,000
Securities Available-for-Sale, Fair Value
Greater than 12 months in an unrealized loss position	56,979,000	56,959,000
Total	$ 56,979,000	$ 56,959,000
Mortgage Backed Securities, Issued by US Government Agencies
Securities Available-for-Sale, Number of Securities
Greater than 12 months in an unrealized loss position \| security	128	128
Total	128	128
Securities Available-for-Sale, Unrealized Losses
Greater than 12 months in an unrealized loss position	$ 12,986,000	$ 12,122,000
Total	12,986,000	12,122,000
Securities Available-for-Sale, Fair Value
Greater than 12 months in an unrealized loss position	101,075,000	106,370,000
Total	$ 101,075,000	$ 106,370,000
States and political subdivisions
Securities Available-for-Sale, Number of Securities
Less than 12 months in an unrealized loss position \| security	20	12
Greater than 12 months in an unrealized loss position \| security	35	25
Total	55	37
Securities Available-for-Sale, Unrealized Losses
Less than 12 months in an unrealized loss position	$ 299,000	$ 137,000
Greater than 12 months in an unrealized loss position	10,984,000	10,195,000
Total	11,283,000	10,332,000
Securities Available-for-Sale, Fair Value
Less than 12 months in an unrealized loss position	63,127,000	27,974,000
Greater than 12 months in an unrealized loss position	126,955,000	106,138,000
Total	$ 190,082,000	$ 134,112,000
Collateralized mortgage obligations
Securities Available-for-Sale, Number of Securities
Less than 12 months in an unrealized loss position \| security		2
Greater than 12 months in an unrealized loss position \| security	144	143
Total	144	145
Securities Available-for-Sale, Unrealized Losses
Less than 12 months in an unrealized loss position		$ 8,000
Greater than 12 months in an unrealized loss position	$ 51,753,000	50,856,000
Total	51,753,000	50,864,000
Securities Available-for-Sale, Fair Value
Less than 12 months in an unrealized loss position		734,000
Greater than 12 months in an unrealized loss position	364,263,000	376,236,000
Total	$ 364,263,000	$ 376,970,000
Asset-backed Securities
Securities Available-for-Sale, Number of Securities
Greater than 12 months in an unrealized loss position \| security	18	19
Total	18	19
Securities Available-for-Sale, Unrealized Losses
Greater than 12 months in an unrealized loss position	$ 2,996,000	$ 3,222,000
Total	2,996,000	3,222,000
Securities Available-for-Sale, Fair Value
Greater than 12 months in an unrealized loss position	60,864,000	63,941,000
Total	$ 60,864,000	$ 63,941,000
Collateralized loan obligations.
Securities Available-for-Sale, Number of Securities
Less than 12 months in an unrealized loss position \| security	2
Greater than 12 months in an unrealized loss position \| security	15	25
Total	17	25
Securities Available-for-Sale, Unrealized Losses
Less than 12 months in an unrealized loss position	$ 7,000
Greater than 12 months in an unrealized loss position	485,000	$ 1,350,000
Total	492,000	1,350,000
Securities Available-for-Sale, Fair Value
Less than 12 months in an unrealized loss position	10,396,000
Greater than 12 months in an unrealized loss position	99,070,000	150,902,000
Total	$ 109,466,000	$ 150,902,000

Securities - Realized Gain (Los

Securities - Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Securities
Proceeds from sales of securities	$ 5,331	$ 66,170
Gross realized gains on securities	1
Gross realized gains on securities	1
Gross realized losses on securities		(1,675)
Net realized losses	$ 1	(1,675)
Income tax benefit on net realized losses		$ 471
Effective tax rate applied (as a percent)	0%	28.10%

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses on Loans - Major Classifications (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans
Total Loans	$ 3,969,411	$ 4,042,953
Allowance for credit losses	(44,113)	(44,264)	$ (53,392)	$ (49,480)
Net loans	3,925,298	3,998,689
Commercial
Loans
Total Loans	796,552	841,697
Allowance for credit losses	(6,382)	(3,998)	(11,511)	(11,968)
Leases
Loans
Total Loans	425,615	398,223
Allowance for credit losses	(2,959)	(2,952)	(2,766)	(2,865)
Commercial real estate - Investor
Loans
Total Loans	1,018,382	1,034,424
Allowance for credit losses	(16,270)	(17,105)	(15,260)	(10,674)
Commercial real estate - Owner occupied
Loans
Total Loans	782,603	796,538
Allowance for credit losses	(10,992)	(12,280)	(15,576)	(15,001)
Construction
Loans
Total Loans	169,174	165,380
Residential real estate - Investor
Loans
Total Loans	51,522	52,595
Allowance for credit losses	(636)	(669)	(746)	(768)
Residential real estate - Owner occupied
Loans
Total Loans	220,223	226,248
Allowance for credit losses	(1,660)	(1,821)	(1,722)	(2,046)
Multifamily
Loans
Total Loans	387,479	401,696
Allowance for credit losses	(2,593)	(2,728)	(2,665)	(2,453)
HELOC
Loans
Total Loans	98,762	103,237
Allowance for credit losses	(1,508)	(1,656)	$ (1,788)	$ (1,806)
Other
Loans
Total Loans	$ 19,099	$ 22,915

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses on Loans - Major Classifications - Loan Concentrations (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Loans
Loans and leases receivable, accrued interest receivable	$ 19.4	$ 20.5
Real estate \| Loan receivables \| Customer Concentration Risk
Loans
Loans receivable as a percentage of total portfolio	68.70%	68.80%

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	$ 44,264	$ 49,480
(Release of) Provision for Credit Losses	3,544	4,652
Charge-offs	3,988	1,022
Recoveries	293	282
Financing Receivable, Allowance for Credit Loss, Ending Balance	44,113	53,392
Net provision expense	3,500
Commercial
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	3,998	11,968
(Release of) Provision for Credit Losses	2,326	(581)
Charge-offs	15	27
Recoveries	73	151
Financing Receivable, Allowance for Credit Loss, Ending Balance	6,382	11,511
Leases
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	2,952	2,865
(Release of) Provision for Credit Losses	(33)	774
Charge-offs		882
Recoveries	40	9
Financing Receivable, Allowance for Credit Loss, Ending Balance	2,959	2,766
Commercial real estate - Investor
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	17,105	10,674
(Release of) Provision for Credit Losses	(902)	4,569
Charge-offs	16
Recoveries	83	17
Financing Receivable, Allowance for Credit Loss, Ending Balance	16,270	15,260
Commercial real estate - Owner occupied
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	12,280	15,001
(Release of) Provision for Credit Losses	2,580	573
Charge-offs	3,887
Recoveries	19	2
Financing Receivable, Allowance for Credit Loss, Ending Balance	10,992	15,576
Real estate - construction
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	1,038	1,546
(Release of) Provision for Credit Losses	59	(501)
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,097	1,045
Residential real estate - Investor
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	669	768
(Release of) Provision for Credit Losses	(35)	(41)
Recoveries	2	19
Financing Receivable, Allowance for Credit Loss, Ending Balance	636	746
Residential real estate - Owner occupied
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	1,821	2,046
(Release of) Provision for Credit Losses	(169)	(334)
Recoveries	8	10
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,660	1,722
Multifamily
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	2,728	2,453
(Release of) Provision for Credit Losses	(135)	212
Financing Receivable, Allowance for Credit Loss, Ending Balance	2,593	2,665
HELOC
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	1,656	1,806
(Release of) Provision for Credit Losses	(165)	(47)
Recoveries	17	29
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,508	1,788
Other
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	17	353
(Release of) Provision for Credit Losses	18	28
Charge-offs	70	113
Recoveries	51	45
Financing Receivable, Allowance for Credit Loss, Ending Balance	16	313
Unfunded Loan Commitment
Allowance for loan losses:
Financing Receivable, Allowance for Credit Loss, Beginning Balance	2,700
Financing Receivable, Allowance for Credit Loss, Ending Balance	2,700	$ 3,800
Unfunded Loan Commitment \| Other Liabilities [Member]
Allowance for loan losses:
ACL on unfunded commitments	$ 2,700

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses on Loans - Collateral dependent loans (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	$ 3,925,298,000	$ 3,998,689,000
ACL Allocation	44,113,000	44,264,000	$ 53,392,000	$ 49,480,000
Non accuring loan	500,000
Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	59,346,000	63,115,000
Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	57,421,000	61,997,000
Accounts Receivable \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI		797,000
Equipment \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	571,000	321,000
Other. \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,354,000
Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	6,164,000	7,878,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	6,382,000	3,998,000	11,511,000	11,968,000
Commercial \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,925,000	1,634,000
Commercial \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI		837,000
Commercial \| Accounts Receivable \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI		797,000
Commercial \| Equipment \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	571,000
Commercial \| Other. \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,354,000
Commercial \| Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	1,356,000	2,000
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	2,959,000	2,952,000	2,766,000	2,865,000
Leases \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI		321,000
Leases \| Equipment \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI		321,000
Leases \| Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation		320,000
Commercial real estate - Investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	16,270,000	17,105,000	15,260,000	10,674,000
Commercial real estate - Investor \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	16,128,000	15,735,000
Commercial real estate - Investor \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	16,128,000	15,735,000
Commercial real estate - Investor \| Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	3,569,000	3,656,000
Commercial real estate - Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	10,992,000	12,280,000	15,576,000	15,001,000
Commercial real estate - Owner occupied \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	30,847,000	34,894,000
Commercial real estate - Owner occupied \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	30,847,000	34,894,000
Commercial real estate - Owner occupied \| Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	1,239,000	3,900,000
Construction \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	7,119,000	7,162,000
Construction \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	7,119,000	7,162,000
Residential real estate - Investor
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	636,000	669,000	746,000	768,000
Residential real estate - Investor \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	409,000	422,000
Residential real estate - Investor \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	409,000	422,000
Residential real estate - Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	1,660,000	1,821,000	1,722,000	2,046,000
Residential real estate - Owner occupied \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,506,000	1,506,000
Residential real estate - Owner occupied \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,506,000	1,506,000
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	2,593,000	2,728,000	2,665,000	2,453,000
Multifamily \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,373,000	1,402,000
Multifamily \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	1,373,000	1,402,000
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	1,508,000	1,656,000	1,788,000	1,806,000
HELOC \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	39,000	39,000
HELOC \| Real Estate \| Asset Pledged as Collateral without Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, including deferred loan loan costs and PCI	39,000	39,000
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
ACL Allocation	$ 16,000	$ 17,000	$ 313,000	$ 353,000

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses on Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Aged analysis of past due loans
Total Loans	$ 3,969,411	$ 4,042,953
Recorded Investment 90 days or Greater Past Due and Accruing	789	1,196
Special Mention [Member]
Aged analysis of past due loans
Total Loans	64,722	70,577
Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	64,646
Total Past Due Including PCI loans		49,392
30 to 59 Days Past Due
Aged analysis of past due loans
Current	19,995
Total Past Due Including PCI loans		10,176
60 to 89 Days Past Due
Aged analysis of past due loans
Current	5,307
Total Past Due Including PCI loans		6,134
90 Days or Greater Past Due
Aged analysis of past due loans
Current	39,344
Total Past Due Including PCI loans		33,082
Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	3,904,765
Current including PCI Loans		3,993,561
Commercial
Aged analysis of past due loans
Total Loans	796,552	841,697
Recorded Investment 90 days or Greater Past Due and Accruing	748	1,155
Commercial \| Special Mention [Member]
Aged analysis of past due loans
Total Loans	20,960	8,007
Commercial \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	13,954	2,210
Commercial \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	12,429	982
Commercial \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	703
Commercial \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	822	1,228
Commercial \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	782,598	839,487
Leases
Aged analysis of past due loans
Total Loans	425,615	398,223
Leases \| Special Mention [Member]
Aged analysis of past due loans
Total Loans	1,714
Leases \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	1,509	946
Leases \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	1,108	599
Leases \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	401	347
Leases \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	424,106	397,277
Commercial real estate - Investor
Aged analysis of past due loans
Total Loans	1,018,382	1,034,424
Commercial real estate - Investor \| Special Mention [Member]
Aged analysis of past due loans
Total Loans		11,267
Commercial real estate - Investor \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	5,400	7,296
Commercial real estate - Investor \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	434	1,209
Commercial real estate - Investor \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	4,966	6,087
Commercial real estate - Investor \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	1,012,982	1,027,128
Commercial real estate - Owner occupied
Aged analysis of past due loans
Total Loans	782,603	796,538
Commercial real estate - Owner occupied \| Special Mention [Member]
Aged analysis of past due loans
Total Loans	26,153	35,677
Commercial real estate - Owner occupied \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	27,646	21,474
Commercial real estate - Owner occupied \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	971	2,103
Commercial real estate - Owner occupied \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	3,776	3,726
Commercial real estate - Owner occupied \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	22,899	15,645
Commercial real estate - Owner occupied \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	754,957	775,064
Real estate - construction
Aged analysis of past due loans
Total Loans	169,174	165,380
Real estate - construction \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	11,339	10,008
Real estate - construction \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	4,220	2,540
Real estate - construction \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current		307
Real estate - construction \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	7,119	7,161
Real estate - construction \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	157,835	155,372
Residential real estate - Investor
Aged analysis of past due loans
Total Loans	51,522	52,595
Residential real estate - Investor \| Special Mention [Member]
Aged analysis of past due loans
Total Loans	65	66
Residential real estate - Investor \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	303	1,287
Residential real estate - Investor \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current		540
Residential real estate - Investor \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	54	579
Residential real estate - Investor \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	249	168
Residential real estate - Investor \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	51,219	51,308
Residential real estate - Owner occupied
Aged analysis of past due loans
Total Loans	220,223	226,248
Residential real estate - Owner occupied \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	2,975	2,622
Residential real estate - Owner occupied \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	656	553
Residential real estate - Owner occupied \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	233	125
Residential real estate - Owner occupied \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	2,086	1,944
Residential real estate - Owner occupied \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	217,248	223,626
Multifamily
Aged analysis of past due loans
Total Loans	387,479	401,696
Multifamily \| Special Mention [Member]
Aged analysis of past due loans
Total Loans	15,482	15,560
Multifamily \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	838	1,318
Multifamily \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current		1,085
Multifamily \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	304
Multifamily \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	534	233
Multifamily \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	386,641	400,378
HELOC
Aged analysis of past due loans
Total Loans	98,762	103,237
Recorded Investment 90 days or Greater Past Due and Accruing	41	41
HELOC \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current	682	2,230
HELOC \| 30 to 59 Days Past Due
Aged analysis of past due loans
Current	177	565
HELOC \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current	237	1,396
HELOC \| 90 Days or Greater Past Due
Aged analysis of past due loans
Current	268	269
HELOC \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	98,080	101,007
Other
Aged analysis of past due loans
Total Loans	19,099	22,915
Other \| Financial Asset, Past Due [Member]
Aged analysis of past due loans
Current		1
Other \| 60 to 89 Days Past Due
Aged analysis of past due loans
Current		1
Other \| Financial Asset, Not Past Due [Member]
Aged analysis of past due loans
Current	$ 19,099	$ 22,914

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses on Loans - Nonaccruals (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual including PCI Loans	$ 64,324,000	$ 67,583,000
Nonaccrual with no ACL	32,784,000	33,099,000
Interest on nonaccrual loans	34,000
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,998,000	870,000
Nonaccrual with no ACL	644,000	870,000
Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	595,000	639,000
Nonaccrual with no ACL	595,000	318,000
Commercial real estate - Investor
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	16,128,000	16,572,000
Nonaccrual with no ACL	8,568,000	8,926,000
Commercial real estate - Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	30,897,000	34,946,000
Nonaccrual with no ACL	8,271,000	8,429,000
Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	7,119,000	7,162,000
Nonaccrual with no ACL	7,119,000	7,162,000
Residential real estate - Investor
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,299,000	1,331,000
Nonaccrual with no ACL	1,299,000	1,331,000
Residential real estate - Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	3,031,000	3,078,000
Nonaccrual with no ACL	3,031,000	3,078,000
Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,959,000	1,775,000
Nonaccrual with no ACL	1,959,000	1,775,000
HELOC
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,298,000	1,210,000
Nonaccrual with no ACL	$ 1,298,000	$ 1,210,000

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses on Loans - Credit Quality (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	$ 142,395,000	$ 965,644,000
2023 / 2022	1,021,561,000	997,009,000
2022/ 2021	981,411,000	737,065,000
2021 / 2020	653,768,000	367,981,000
2020/ 2019	309,804,000	192,786,000
Prior	446,658,000	306,846,000
Revolving Loans	413,814,000	474,214,000
Revolving Loans Converted To Term Loans		1,408,000
Total Loans	3,969,411,000	4,042,953,000
Minimum
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Loan commitment for inclusion in credit quality analysis	50,000
Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	142,395,000	963,994,000
2023 / 2022	1,017,967,000	958,129,000
2022/ 2021	926,304,000	682,010,000
2021 / 2020	615,889,000	344,237,000
2020/ 2019	287,129,000	158,932,000
Prior	403,809,000	280,746,000
Revolving Loans	375,744,000	450,136,000
Revolving Loans Converted To Term Loans		1,408,000
Total Loans	3,769,237,000	3,839,592,000
Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023		1,650,000
2023 / 2022	1,946,000	20,320,000
2022/ 2021	22,739,000	35,050,000
2021 / 2020	18,970,000	3,621,000
2020/ 2019	3,526,000	1,863,000
Prior	3,354,000	3,681,000
Revolving Loans	14,187,000	4,392,000
Total Loans	64,722,000	70,577,000
Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022	1,648,000	18,560,000
2022/ 2021	32,368,000	20,005,000
2021 / 2020	18,909,000	20,123,000
2020/ 2019	19,149,000	31,991,000
Prior	39,495,000	22,419,000
Revolving Loans	23,883,000	19,686,000
Total Loans	135,452,000	132,784,000
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	10,284,000	318,569,000
2023 / 2022	313,611,000	141,504,000
2022/ 2021	133,516,000	36,754,000
2021 / 2020	32,052,000	12,154,000
2020/ 2019	10,608,000	18,589,000
Prior	19,834,000	3,426,000
Revolving Loans	276,647,000	309,293,000
Revolving Loans Converted To Term Loans		1,408,000
Total Loans	796,552,000	841,697,000
Commercial \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	10,284,000	318,569,000
2023 / 2022	313,611,000	136,668,000
2022/ 2021	125,215,000	35,901,000
2021 / 2020	28,810,000	11,983,000
2020/ 2019	10,497,000	18,390,000
Prior	19,834,000	3,426,000
Revolving Loans	252,098,000	298,931,000
Revolving Loans Converted To Term Loans		1,408,000
Total Loans	760,349,000	825,276,000
Commercial \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		2,737,000
2022/ 2021	3,598,000	707,000
2021 / 2020	3,064,000	171,000
2020/ 2019	111,000
Revolving Loans	14,187,000	4,392,000
Total Loans	20,960,000	8,007,000
Commercial \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		2,099,000
2022/ 2021	4,703,000	146,000
2021 / 2020	178,000
2020/ 2019		199,000
Revolving Loans	10,362,000	5,970,000
Total Loans	15,243,000	8,414,000
Real estate - residential loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Mortgage loans in process of foreclosure	378,000	170,000
Leases
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	61,834,000	219,163,000
2023 / 2022	205,875,000	113,481,000
2022/ 2021	101,028,000	42,478,000
2021 / 2020	37,323,000	14,663,000
2020/ 2019	12,450,000	7,183,000
Prior	7,105,000	1,255,000
Total Loans	425,615,000	398,223,000
Leases \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	61,834,000	219,163,000
2023 / 2022	205,567,000	113,074,000
2022/ 2021	100,256,000	42,275,000
2021 / 2020	36,105,000	14,663,000
2020/ 2019	12,450,000	6,975,000
Prior	7,094,000	1,255,000
Total Loans	423,306,000	397,405,000
Leases \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022	308,000
2022/ 2021	380,000
2021 / 2020	1,015,000
Prior	11,000
Total Loans	1,714,000
Leases \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		407,000
2022/ 2021	392,000	203,000
2021 / 2020	203,000
2020/ 2019		208,000
Total Loans	595,000	818,000
Commercial real estate - Investor
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	46,126,000	159,654,000
2023 / 2022	202,045,000	367,512,000
2022/ 2021	345,533,000	230,189,000
2021 / 2020	173,506,000	113,711,000
2020/ 2019	99,628,000	69,980,000
Prior	119,049,000	72,929,000
Revolving Loans	32,495,000	20,449,000
Total Loans	1,018,382,000	1,034,424,000
Commercial real estate - Investor \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	46,126,000	159,654,000
2023 / 2022	200,397,000	367,512,000
2022/ 2021	341,405,000	218,084,000
2021 / 2020	170,710,000	108,384,000
2020/ 2019	94,342,000	54,322,000
Prior	101,984,000	63,281,000
Revolving Loans	20,264,000	8,122,000
Total Loans	975,228,000	979,359,000
Commercial real estate - Investor \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2022/ 2021		11,267,000
Total Loans		11,267,000
Commercial real estate - Investor \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022	1,648,000
2022/ 2021	4,128,000	838,000
2021 / 2020	2,796,000	5,327,000
2020/ 2019	5,286,000	15,658,000
Prior	17,065,000	9,648,000
Revolving Loans	12,231,000	12,327,000
Total Loans	43,154,000	43,798,000
Commercial real estate - Owner occupied
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	7,877,000	125,709,000
2023 / 2022	139,357,000	166,428,000
2022/ 2021	184,678,000	205,955,000
2021 / 2020	203,123,000	110,808,000
2020/ 2019	102,034,000	57,866,000
Prior	143,706,000	96,529,000
Revolving Loans	1,828,000	33,243,000
Total Loans	782,603,000	796,538,000
Commercial real estate - Owner occupied \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	7,877,000	124,059,000
2023 / 2022	137,719,000	134,383,000
2022/ 2021	151,782,000	177,553,000
2021 / 2020	185,939,000	103,109,000
2020/ 2019	85,511,000	42,839,000
Prior	124,527,000	91,062,000
Revolving Loans	1,828,000	33,243,000
Total Loans	695,183,000	706,248,000
Commercial real estate - Owner occupied \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023		1,650,000
2023 / 2022	1,638,000	17,415,000
2022/ 2021	18,249,000	9,585,000
2021 / 2020	1,452,000	3,128,000
2020/ 2019	3,104,000	218,000
Prior	1,710,000	3,681,000
Total Loans	26,153,000	35,677,000
Commercial real estate - Owner occupied \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		14,630,000
2022/ 2021	14,647,000	18,817,000
2021 / 2020	15,732,000	4,571,000
2020/ 2019	13,419,000	14,809,000
Prior	17,469,000	1,786,000
Total Loans	61,267,000	54,613,000
Construction
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	10,236,000	42,808,000
2023 / 2022	42,569,000	66,513,000
2022/ 2021	85,184,000	32,942,000
2021 / 2020	26,818,000	10,093,000
2020/ 2019	95,000	1,593,000
Prior	1,747,000	8,245,000
Revolving Loans	2,525,000	3,186,000
Total Loans	169,174,000	165,380,000
Construction \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	10,236,000	42,808,000
2023 / 2022	42,569,000	66,513,000
2022/ 2021	77,717,000	32,942,000
2021 / 2020	26,818,000	100,000
2020/ 2019	95,000	1,593,000
Prior	1,747,000	1,083,000
Revolving Loans	2,525,000	3,186,000
Total Loans	161,707,000	148,225,000
Construction \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2022/ 2021	348,000
Total Loans	348,000
Construction \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2022/ 2021	7,119,000
2021 / 2020		9,993,000
Prior		7,162,000
Total Loans	7,119,000	17,155,000
Residential real estate - Investor
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,101,000	5,062,000
2023 / 2022	4,925,000	14,824,000
2022/ 2021	14,647,000	9,093,000
2021 / 2020	8,581,000	6,227,000
2020/ 2019	6,137,000	6,916,000
Prior	14,625,000	9,002,000
Revolving Loans	1,506,000	1,471,000
Total Loans	51,522,000	52,595,000
Residential real estate - Investor \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,101,000	5,062,000
2023 / 2022	4,925,000	14,434,000
2022/ 2021	14,269,000	9,027,000
2021 / 2020	8,516,000	6,227,000
2020/ 2019	6,137,000	6,508,000
Prior	13,704,000	8,469,000
Revolving Loans	1,506,000	1,471,000
Total Loans	50,158,000	51,198,000
Residential real estate - Investor \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2022/ 2021		66,000
2021 / 2020	65,000
Total Loans	65,000	66,000
Residential real estate - Investor \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		390,000
2022/ 2021	378,000
2020/ 2019		408,000
Prior	921,000	533,000
Total Loans	1,299,000	1,331,000
Residential real estate - Owner occupied
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,397,000	32,574,000
2023 / 2022	31,591,000	41,528,000
2022/ 2021	40,203,000	40,335,000
2021 / 2020	39,818,000	25,513,000
2020/ 2019	24,953,000	14,918,000
Prior	81,459,000	70,617,000
Revolving Loans	802,000	763,000
Total Loans	220,223,000	226,248,000
Residential real estate - Owner occupied \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,397,000	32,574,000
2023 / 2022	31,591,000	41,528,000
2022/ 2021	40,203,000	40,335,000
2021 / 2020	39,818,000	25,322,000
2020/ 2019	24,764,000	14,233,000
Prior	78,480,000	68,277,000
Revolving Loans	802,000	763,000
Total Loans	217,055,000	223,032,000
Residential real estate - Owner occupied \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2021 / 2020		191,000
2020/ 2019	189,000	685,000
Prior	2,979,000	2,340,000
Total Loans	3,168,000	3,216,000
Multifamily
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,240,000	55,310,000
2023 / 2022	75,556,000	80,237,000
2022/ 2021	72,462,000	137,259,000
2021 / 2020	131,069,000	72,861,000
2020/ 2019	52,186,000	13,876,000
Prior	54,400,000	41,591,000
Revolving Loans	566,000	562,000
Total Loans	387,479,000	401,696,000
Multifamily \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,240,000	55,310,000
2023 / 2022	75,556,000	79,060,000
2022/ 2021	71,322,000	123,834,000
2021 / 2020	117,695,000	72,539,000
2020/ 2019	51,661,000	12,231,000
Prior	51,998,000	40,825,000
Revolving Loans	566,000	562,000
Total Loans	370,038,000	384,361,000
Multifamily \| Special Mention [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		168,000
2022/ 2021	164,000	13,425,000
2021 / 2020	13,374,000	322,000
2020/ 2019	311,000	1,645,000
Prior	1,633,000
Total Loans	15,482,000	15,560,000
Multifamily \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		1,009,000
2022/ 2021	976,000
2020/ 2019	214,000
Prior	769,000	766,000
Total Loans	1,959,000	1,775,000
HELOC
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	725,000	2,735,000
2023 / 2022	2,678,000	2,704,000
2022/ 2021	2,559,000	491,000
2021 / 2020	449,000	1,798,000
2020/ 2019	1,586,000	1,780,000
Prior	4,589,000	3,179,000
Revolving Loans	86,176,000	90,550,000
Total Loans	98,762,000	103,237,000
HELOC \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	725,000	2,735,000
2023 / 2022	2,678,000	2,679,000
2022/ 2021	2,534,000	490,000
2021 / 2020	449,000	1,757,000
2020/ 2019	1,545,000	1,756,000
Prior	4,297,000	2,995,000
Revolving Loans	84,886,000	89,161,000
Total Loans	97,114,000	101,573,000
HELOC \| Substandard [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2023 / 2022		25,000
2022/ 2021	25,000	1,000
2021 / 2020		41,000
2020/ 2019	41,000	24,000
Prior	292,000	184,000
Revolving Loans	1,290,000	1,389,000
Total Loans	1,648,000	1,664,000
Other
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,575,000	4,060,000
2023 / 2022	3,354,000	2,278,000
2022/ 2021	1,601,000	1,569,000
2021 / 2020	1,029,000	153,000
2020/ 2019	127,000	85,000
Prior	144,000	73,000
Revolving Loans	11,269,000	14,697,000
Total Loans	19,099,000	22,915,000
Other \| Pass [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
2024 / 2023	1,575,000	4,060,000
2023 / 2022	3,354,000	2,278,000
2022/ 2021	1,601,000	1,569,000
2021 / 2020	1,029,000	153,000
2020/ 2019	127,000	85,000
Prior	144,000	73,000
Revolving Loans	11,269,000	14,697,000
Total Loans	$ 19,099,000	$ 22,915,000

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses on Loans - Charge-offs Activity by Loan Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Loans by risk rating
2021	$ 3,853
2020	16
Prior	119
Total	3,988	$ 1,022
Commercial
Loans by risk rating
Prior	15
Total	15	27
Leases
Loans by risk rating
Total		882
Commercial real estate - Investor
Loans by risk rating
2020	16
Total	16
Commercial real estate - Owner occupied
Loans by risk rating
2021	3,853
Prior	34
Total	3,887
Other
Loans by risk rating
Prior	70
Total	$ 70	$ 113

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses on Loans - TDR (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) loan	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($) item	Mar. 31, 2023 USD ($) loan
Troubled debt restructurings - modified during the period
Number of payment modification	6		2	3
Total Loans modified	$ 18,612	$ 18,612	$ 18,612	$ 2,773
Payment default		0		$ 0
Other information
Number of payment modification	6		2	3
Commercial
Troubled debt restructurings - modified during the period
Total Loans modified	$ 247	$ 247	$ 247	$ 979

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses on Loans - Loan Modifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable
Total Loans modified	$ 18,612	$ 2,773
Total Loan Segment Modified to Total Loan Segment	0.50%	0.10%
Weighted-Average Term Extension (In Months)	7 months 6 days	6 months 21 days
Weighted-Average Interest Rate Change	0.15%	5%
Weighted-Average Delay of Payment (In Months)		7 months
Current
Financing Receivable
Total Loans modified	$ 18,612	$ 2,773
Term Extension
Financing Receivable
Total Loans modified	12,491	20
Combination - Term Extension and Payment Modification
Financing Receivable
Total Loans modified	2,812	1,774
Combination - Term Extension and Interest Rate Modification
Financing Receivable
Total Loans modified	3,309	979
Commercial
Financing Receivable
Total Loans modified	$ 247	$ 979
Total Loan Segment Modified to Total Loan Segment	0%	0.10%
Weighted-Average Term Extension (In Months)	4 months	4 months
Weighted-Average Interest Rate Change		5%
Commercial \| Current
Financing Receivable
Total Loans modified	$ 247	$ 979
Commercial \| Term Extension
Financing Receivable
Total Loans modified	247
Commercial \| Combination - Term Extension and Interest Rate Modification
Financing Receivable
Total Loans modified		979
Commercial real estate - Investor
Financing Receivable
Total Loans modified	$ 1,958	$ 1,774
Total Loan Segment Modified to Total Loan Segment	0.20%	0.20%
Weighted-Average Term Extension (In Months)	24 months	8 months
Weighted-Average Delay of Payment (In Months)		7 months
Commercial real estate - Investor \| Current
Financing Receivable
Total Loans modified	$ 1,958	$ 1,774
Commercial real estate - Investor \| Combination - Term Extension and Payment Modification
Financing Receivable
Total Loans modified	1,958	1,774
Commercial real estate - Owner occupied
Financing Receivable
Total Loans modified	$ 16,407
Total Loan Segment Modified to Total Loan Segment	2.10%
Weighted-Average Term Extension (In Months)	5 months 7 days
Weighted-Average Interest Rate Change	0.15%
Commercial real estate - Owner occupied \| Current
Financing Receivable
Total Loans modified	$ 16,407
Commercial real estate - Owner occupied \| Term Extension
Financing Receivable
Total Loans modified	12,244
Commercial real estate - Owner occupied \| Combination - Term Extension and Payment Modification
Financing Receivable
Total Loans modified	854
Commercial real estate - Owner occupied \| Combination - Term Extension and Interest Rate Modification
Financing Receivable
Total Loans modified	$ 3,309
HELOC
Financing Receivable
Total Loans modified		$ 20
Total Loan Segment Modified to Total Loan Segment		0%
Weighted-Average Term Extension (In Months)		24 months
HELOC \| Current
Financing Receivable
Total Loans modified		$ 20
HELOC \| Term Extension
Financing Receivable
Total Loans modified		$ 20

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended
Other Real Estate Owned (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Activity in the other real estate owned (OREO) portfolio, net of valuation reserve
Balance at beginning of period	$ 5,123	$ 1,561
Property additions, net of acquisition adjustments		291
Less: Proceeds from property disposals, net of participation purchase and of gains/losses		328
Less: Period valuation write-down		269
Balance at end of period	5,123	1,255
Activity in the valuation allowance
Balance at beginning of period	118	856
Provision for unrealized losses		269
Reductions taken on sales		(272)
Balance at end of period	118	853
Expenses related to foreclosed assets, net of lease revenue
Gain on sales, net		28
Provision for unrealized losses		269
Operating expenses	113	9
Less: Lease revenue	67
Net OREO expense	$ 46	$ 306

Deposits - Classifications of D

Deposits - Classifications of Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposits
Noninterest bearing demand	$ 1,799,927	$ 1,834,891
Savings	955,528	971,334
NOW accounts	569,814	565,375
Money market accounts	696,354	671,240
Certificates of deposit of less than $100,000	289,962	266,035
Certificates of deposit of $100,000 through $250,000	205,638	180,289
Certificates of deposit of more than $250,000	91,052	81,582
Total deposits	$ 4,608,275	$ 4,570,746

Borrowings - Summary (Details)

Borrowings - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Borrowings
Total borrowings	$ 338,722	$ 516,625
Securities sold under repurchase agreements
Borrowings
Total borrowings	33,546	26,470
Other short-term borrowings
Borrowings
Total borrowings	220,000	405,000
Junior Subordinated Debentures
Borrowings
Total borrowings	25,773	25,773
Subordinated debentures
Borrowings
Total borrowings	$ 59,403	$ 59,382

Borrowings - Additional informa

Borrowings - Additional information (Details) $ in Thousands			1 Months Ended	3 Months Ended
	Feb. 24, 2023 USD ($)	Feb. 24, 2020 USD ($)	Dec. 31, 2016	Mar. 31, 2024 USD ($) item	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2023 USD ($)
Borrowings
Number of customers having secured balances exceeding specified percentage of stockholders equity \| item				0
Threshold percentage of stockholders' equity				10%
Borrowings at FHLBC as percentage of total assets				35%
FHLBC stock				$ 13,600				$ 18,500
Proceeds from term note		$ 30,000
Repayment of term note						$ 9,000
Basis points added to reference rate (as a percent)		1.75%
Outstanding, net of deferred issuance costs				59,400				59,400
Asset Pledged as Collateral with Right \| Securities sold under repurchase agreements
Borrowings
Investment securities pledged with financial institutions, dollars				45,200				45,700
Securities sold under repurchase agreements
Borrowings
Investment securities pledged with financial institutions, dollars				$ 33,500				26,500
Federal Home Loan Bank Advances
Borrowings
Borrowings at FHLBC as percentage of book value of certain mortgage loans				60%
FHLBC advance amount				$ 220,000				$ 405,000
FHLBC stock				13,600
Principal balance of loans collateralized				1,440,000
Combined collateral value				998,900,000
Amount available for additional borrowings				$ 778,900
Senior Notes [Member]
Borrowings
Interest rate (as a percent)			5.75%
Debt Instrument, Term			10 years
Interest rate term			5 years
Effective interest rate					9.39%
Debt issuance costs					$ 362
Debt instrument redemption price, percentage				100%	12.85%
Debt redeemed amount					$ 45,000
Senior Notes [Member] \| Debt Instrument Variable Rate Base LIBOR [Member]
Borrowings
Basis points added to reference rate (as a percent)			3.85%
Term Debt
Borrowings
Proceeds from term note		$ 20,000
Repayment of term note	$ 9,000
Debt term		3 years
Subordinated Notes Due 2031
Borrowings
Interest rate (as a percent)							3.50%
Face amount							$ 60,000
Subordinated Notes Due 2031 \| Three Months Secured Overnight Financing Rate
Borrowings
Basis points added to reference rate (as a percent)							2.73%

Junior Subordinated Debentures

Junior Subordinated Debentures - Issuance (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended	7 Months Ended
	Apr. 30, 2007	Mar. 31, 2024	Jun. 15, 2017	Dec. 31, 2017	Dec. 31, 2023	Mar. 31, 2023
Junior subordinated debentures
Junior subordinated debentures		$ 25,773			$ 25,773
Old Second Capital Trust II [Member]
Junior subordinated debentures
Proceeds from sale of cumulative trust preferred securities	$ 25,000
Maturity Period		30 years
Cash distribution fixed rate of trust preferred securities (as a percent)			6.77%
Basis points added to cash distribution floating rate base (as a percent)				1.50%
Cash distribution, floating rate base		three-month SOFR
Amortization period		30 years
Old Second Capital Trust II [Member] \| Debt Instrument, Redemption, Period One [Member]
Junior subordinated debentures
Interest rate (as a percent)		4.37%				4.39%
Junior Subordinated Debentures
Junior subordinated debentures
Junior Subordinated Debentures issuance cost		$ 1,000			$ 1,000
Junior Subordinated Debentures \| Old Second Capital Trust II [Member]
Junior subordinated debentures
Junior subordinated debentures		$ 25,800

Equity Compensation Plans (Deta

Equity Compensation Plans (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
Equity Compensation Plans (Details) - USD ($) $ in Millions	May 31, 2021	Mar. 31, 2024	Mar. 31, 2023	May 31, 2019
Equity Compensation Plans
Total compensation cost		$ 1.2	$ 948,000
Vesting Percentage , Fully Vest , Performance measure		50%
Minimum
Equity Compensation Plans
Vesting Percentage , Fully Vest , Performance measure		50%
Maximum
Equity Compensation Plans
Vesting Percentage , Pro rata , Performance measure		50%
2019 Plan
Equity Compensation Plans
Number of shares authorized	1,800,000			600,000
Increase in number of shares authorized	1,200,000
Number of shares available for issuance		712,201

Equity Compensation Plans - Res

Equity Compensation Plans - Restricted Stock and RSUs (Details) - Restricted Stock and Restricted Stock Units [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Changes in unvested awards
Nonvested at the beginning of the period (in shares)	709,237
Granted (in shares)	338,235	230,399
Vested (in shares)	(204,969)
Forfeited (in shares)	(3,000)
Nonvested at the end of the period (in shares)	839,503
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 14.26
Granted (in dollars per share)	13.44
Vested (in dollars per share)	11.32
Forfeited (in dollars per share)	12.35
Nonvested at the end of the period (in dollars per share)	$ 14.65
Additional information
Total unrecognized compensation cost of restricted awards	$ 6.9
Expected weighted-average period for recognition of unrecognized compensation	2 years 2 months 8 days

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic earnings per share:
Weighted-average common shares outstanding	44,758,559	44,619,118
Net income	$ 21,312	$ 23,607
Basic earnings per share	$ 0.48	$ 0.53
Diluted earnings per share:
Weighted-average common shares outstanding	44,758,559	44,619,118
Diluted average common shares outstanding	45,523,884	45,316,598
Net earnings available to common stockholders	$ 21,312	$ 23,607
Diluted earnings per share	$ 0.47	$ 0.52
Restricted Stock and Restricted Stock Units [Member]
Diluted earnings per share:
Dilutive effect of share-based payment awards (in shares)	765,325	697,480

Regulatory & Capital Matters (D

Regulatory & Capital Matters (Details) $ in Millions		3 Months Ended	12 Months Ended
Regulatory & Capital Matters (Details) $ in Millions	Nov. 06, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)		0.1047	0.1006
Risk-based capital ratio (as a percent)		0.1479	0.1406
Payments of Dividends	$ 2.2
Deferment of impact on retained earnings		$ 951,000
Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)		0.1089	0.1041
Risk-based capital ratio (as a percent)		0.1403	0.1324
Tier One leverage ratio, basis point increase (as a percent)		0.48%
Risk-based capital ratio, basis point increase (as a percent)			0.79%
Minimum \| Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)		0.08
Risk-based capital ratio (as a percent)		0.12
Tier 1 capital leverage ratio, board-designated threshold		8%
Total Capital Ratio, board-designated threshold (as a percent)		12%

Regulatory & Capital Matters -

Regulatory & Capital Matters - Capital Levels and Industry Defined Regulatory Minimums (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Common equity tier 1 capital to risk weighted assets
Actual	$ 566,730	$ 547,721
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	$ 330,042	$ 337,207
Common equity tier 1 capital to risk weighted assets, Ratio
Actual (as a percent)	0.1202%	0.1137%
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	7%	0.07%
Total capital to risk weighted assets, Amount
Actual at period end	$ 697,211	$ 677,076
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	$ 494,977	$ 505,640
Total capital to risk weighted assets, Ratio
Risk-based capital ratio (as a percent)	0.1479	0.1406
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.1050	0.1050
Tier 1 capital to risk weighted assets, Amount
Actual	$ 591,730	$ 572,721
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	$ 400,773	$ 409,430
Tier 1 capital to risk weighted assets, Ratio
Actual (as a percent)	0.1255	0.1189
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.0850	0.0850
Tier 1 capital to average assets, Amount
Actual	$ 591,730	$ 572,721
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	$ 226,067	$ 227,722
Tier 1 capital to average assets, Ratio
Tier 1 capital leverage ratio (as a percent)	0.1047	0.1006
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.0400	0.0400
Subsidiaries [Member]
Common equity tier 1 capital to risk weighted assets
Actual	$ 614,947	$ 592,413
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	329,604	336,598
Minimum Required to Be Well Capitalized	$ 306,061	$ 312,556
Common equity tier 1 capital to risk weighted assets, Ratio
Actual (as a percent)	0.1306%	0.1232%
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	7%	0.07%
Minimum Required to Be Well Capitalized (as a percent)	6.50%	6.50%
Total capital to risk weighted assets, Amount
Actual at period end	$ 660,429	$ 636,768
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	494,263	504,990
Minimum Required to Be Well Capitalized	$ 470,726	$ 480,943
Total capital to risk weighted assets, Ratio
Risk-based capital ratio (as a percent)	0.1403	0.1324
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.1050	0.1050
Minimum Required to Be Well Capitalized (as a percent)	0.1000	0.1000
Tier 1 capital to risk weighted assets, Amount
Actual	$ 614,947	$ 592,413
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	400,233	408,727
Minimum Required to Be Well Capitalized	$ 376,690	$ 384,684
Tier 1 capital to risk weighted assets, Ratio
Actual (as a percent)	0.1306	0.1232
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.0850	0.0850
Minimum Required to Be Well Capitalized (as a percent)	0.0800	0.0800
Tier 1 capital to average assets, Amount
Actual	$ 614,947	$ 592,413
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable	225,876	227,632
Minimum Required to Be Well Capitalized	$ 282,345	$ 284,540
Tier 1 capital to average assets, Ratio
Tier 1 capital leverage ratio (as a percent)	0.1089	0.1041
Minimum Required for Capital Adequacy Purposes with Capital Conservation Buffer if applicable (as a percent)	0.0400	0.0400
Minimum Required to Be Well Capitalized (as a percent)	0.0500	0.0500

Regulatory & Capital Matters _2

Regulatory & Capital Matters - Dividend Restrictions and Deferrals (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Dividend Restrictions and Deferrals
Number of previous years retained profit considered for dividend payment	2 years
Minimum capital requirements, minimum percentage required	2.50%
Payments of dividends	$ 93.7

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value transfer assets into level 3	$ 0
Asset-backed Securities
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value transfer assets out of level 3		$ 14,885
Collateralized loan obligations.
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value transfer assets out of level 3		$ (6,800)

Fair Value Measurements - Recur

Fair Value Measurements - Recurring (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Securities available-for-sale	$ 1,168,797	$ 1,192,829
Mortgage servicing rights	10,564	10,344
U.S. Treasury
Assets:
Securities available-for-sale	171,000	169,574
U.S. government agencies
Assets:
Securities available-for-sale	56,979	56,959
States and political subdivisions
Assets:
Securities available-for-sale	222,742	227,065
Collateralized mortgage obligations
Assets:
Securities available-for-sale	379,603	392,544
Asset-backed Securities
Assets:
Securities available-for-sale	66,707	68,436
Collateralized loan obligations.
Assets:
Securities available-for-sale	170,691	171,881
Fair Value, Inputs, Level 1 [Member]
Assets:
Securities available-for-sale	171,000	169,574
Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale	982,409	1,007,926
Loans held-for-sale	1,072	1,322
Other assets	5,947	5,302
Liabilities:
Other liabilities	8,917	8,324
Fair Value, Inputs, Level 3 [Member]
Assets:
Securities available-for-sale	15,388	15,329
Mortgage servicing rights	10,564	10,344
Fair Value, Measurements, Recurring [Member]
Assets:
Loans held-for-sale	1,072	1,322
Mortgage servicing rights	10,564	10,344
Total financial assets	1,186,483	1,209,876
Liabilities:
Total	8,917	8,324
Fair Value, Measurements, Recurring [Member] \| Interest rate swap agreements, including risk participation agreement
Assets:
Other assets	6,001	5,391
Liabilities:
Other liabilities	8,917	8,324
Fair Value, Measurements, Recurring [Member] \| Forward Contracts [Member]
Assets:
Other assets	49	(10)
Fair Value, Measurements, Recurring [Member] \| U.S. Treasury
Assets:
Securities available-for-sale	171,000	169,574
Fair Value, Measurements, Recurring [Member] \| U.S. government agencies
Assets:
Securities available-for-sale	56,979	56,959
Fair Value, Measurements, Recurring [Member] \| Mortgage Backed Securities, Issued by US Government Agencies
Assets:
Securities available-for-sale	101,075	106,370
Fair Value, Measurements, Recurring [Member] \| States and political subdivisions
Assets:
Securities available-for-sale	222,742	227,065
Fair Value, Measurements, Recurring [Member] \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	379,603	392,544
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities
Assets:
Securities available-for-sale	66,707	68,436
Fair Value, Measurements, Recurring [Member] \| Collateralized loan obligations.
Assets:
Securities available-for-sale	170,691	171,881
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets:
Total financial assets	171,000	169,574
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| U.S. Treasury
Assets:
Securities available-for-sale	171,000	169,574
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets:
Loans held-for-sale	1,072	1,322
Total financial assets	989,531	1,014,629
Liabilities:
Total	8,917	8,324
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Interest rate swap agreements, including risk participation agreement
Assets:
Other assets	6,001	5,391
Liabilities:
Other liabilities	8,917	8,324
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Forward Contracts [Member]
Assets:
Other assets	49	(10)
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| U.S. government agencies
Assets:
Securities available-for-sale	56,979	56,959
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Mortgage Backed Securities, Issued by US Government Agencies
Assets:
Securities available-for-sale	101,075	106,370
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| States and political subdivisions
Assets:
Securities available-for-sale	209,839	214,006
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Collateralized mortgage obligations
Assets:
Securities available-for-sale	379,603	392,544
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Asset-backed Securities
Assets:
Securities available-for-sale	64,222	66,166
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Collateralized loan obligations.
Assets:
Securities available-for-sale	170,691	171,881
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets:
Mortgage servicing rights	10,564	10,344
Total financial assets	25,952	25,673
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| States and political subdivisions
Assets:
Securities available-for-sale	12,903	13,059
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Asset-backed Securities
Assets:
Securities available-for-sale	$ 2,485	$ 2,270

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Level 3 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Changes in Level 3
Transfers into Level 3	$ 0
Collateralized Mortgage Obligations
Changes in Level 3
Beginning balance		$ 6,770
Transfers out of Level 3		(6,764)
Total gains or losses
Included in other comprehensive income		(6)
Asset-backed Securities
Changes in Level 3
Beginning balance	2,270	16,741
Transfers out of Level 3		(14,885)
Total gains or losses
Included in earnings		(11)
Included in other comprehensive income	(29)	219
Purchases, issuances, sales, and settlements
Purchases	259	406
Settlements	(15)	(355)
Ending balance	2,485	2,115
Collateralized loan obligations.
Changes in Level 3
Transfers out of Level 3		6,800
States and political subdivisions
Changes in Level 3
Beginning balance	13,059	12,501
Total gains or losses
Included in earnings	(33)	(34)
Included in other comprehensive income	(89)	430
Purchases, issuances, sales, and settlements
Settlements	(34)	(33)
Ending balance	12,903	12,864
Mortgage Servicing rights
Changes in Level 3
Beginning balance	10,344	11,189
Total gains or losses
Included in earnings	172	(471)
Purchases, issuances, sales, and settlements
Issuances	126	120
Settlements	(78)	(54)
Ending balance	$ 10,564	$ 10,784

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative and Qualitative Information (Details)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Quantitative information about Level 3 fair value measurements
Mortgage servicing rights, fair value	$ 10,564,000	$ 10,344,000
Securities available-for-sale, at fair value	1,168,797,000	1,192,829,000
Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Mortgage servicing rights, fair value	10,564,000	10,344,000
Securities available-for-sale, at fair value	15,388,000	15,329,000
Asset-backed Securities
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	66,707,000	68,436,000
States and political subdivisions
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	222,742,000	227,065,000
Collateralized mortgage obligations
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	379,603,000	392,544,000
Fair Value, Measurements, Recurring [Member]
Quantitative information about Level 3 fair value measurements
Mortgage servicing rights, fair value	10,564,000	10,344,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Mortgage servicing rights, fair value	10,564,000	10,344,000
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	66,707,000	68,436,000
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	2,485,000	2,270,000
Fair Value, Measurements, Recurring [Member] \| States and political subdivisions
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	222,742,000	227,065,000
Fair Value, Measurements, Recurring [Member] \| States and political subdivisions \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	12,903,000	13,059,000
Fair Value, Measurements, Recurring [Member] \| Collateralized mortgage obligations
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	379,603,000	392,544,000
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Asset-backed Securities \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	$ 2,485,000	$ 2,270,000
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Asset-backed Securities \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Minimum
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.055	0.056
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Asset-backed Securities \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Maximum
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.055	0.056
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Asset-backed Securities \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Weighted Average [Member]
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.055	0.056
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Mortgage servicing rights, fair value	$ 10,564,000	$ 10,344,000
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Minimum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input		0.090
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Maximum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input		0.110
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Weighted Average [Member]
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.090	0.090
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member]
Quantitative information about Level 3 fair value measurements
Securities available-for-sale, at fair value	$ 12,903,000	$ 13,059,000
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Minimum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.090
Debt Securities, Measurement Input	0.032	0.032
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Maximum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.110
Debt Securities, Measurement Input	0.037	0.054
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Discount Rate \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Weighted Average [Member]
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.035	0.047
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Constant Prepayment Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Minimum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.052	0.051
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Constant Prepayment Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Maximum
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.315	0.330
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Constant Prepayment Rate \| Mortgage Servicing Rights [Member] \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Weighted Average [Member]
Quantitative information about Level 3 fair value measurements
Servicing Asset, Measurement Input	0.061	0.066
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Liquidity Premium \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Minimum
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.005	0.005
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Liquidity Premium \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Maximum
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.005	0.005
Fair Value, Measurements, Recurring [Member] \| Measurement Input, Liquidity Premium \| States and political subdivisions \| Discounted Cash Flow Valuation Technique [Member] \| Fair Value, Inputs, Level 3 [Member] \| Weighted Average [Member]
Quantitative information about Level 3 fair value measurements
Debt Securities, Measurement Input	0.005	0.005

Fair Value Measurements - Nonre

Fair Value Measurements - Nonrecurring (Details) - USD ($)	3 Months Ended	12 Months Ended
Fair Value Measurements - Nonrecurring (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets and liabilities measured at fair value
Carrying value of other real estate owned	$ 5,123,000	$ 5,123,000	$ 1,255,000	$ 1,561,000
OREO Valuation allowance	118,000	118,000	$ 853,000	$ 856,000
Impaired Loans [Member] \| Reported Value Measurement [Member]
Assets and liabilities measured at fair value
Increase (decrease) of specific allocations within the provision for loan losses		6,500,000
Fair Value, Measurements, Nonrecurring [Member]
Assets and liabilities measured at fair value
Total	58,305,000	71,303,000
Fair Value, Measurements, Nonrecurring [Member] \| Impaired Loans [Member]
Assets and liabilities measured at fair value
Total	53,182,000	66,180,000
Valuation allowance	6,200,000	11,100,000
Decrease of specific allocations within the provision for loan losses	4,900,000
Fair Value, Measurements, Nonrecurring [Member] \| Impaired Loans [Member] \| Reported Value Measurement [Member]
Assets and liabilities measured at fair value
Total	59,300,000	77,300,000
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned [Member]
Assets and liabilities measured at fair value
Total	5,123,000	5,123,000
Carrying value of other real estate owned	5,100,000	5,100,000
Outstanding balance	5,200,000	5,200,000
OREO Valuation allowance	118,000	118,000,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets and liabilities measured at fair value
Total	58,305,000	71,303,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Impaired Loans [Member]
Assets and liabilities measured at fair value
Total	53,182,000	66,180,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Other Real Estate Owned [Member]
Assets and liabilities measured at fair value
Total	$ 5,123,000	$ 5,123,000

Fair Values of Financial Inst_3

Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Cash and due from banks	$ 48,841	$ 55,534
Interest earning deposits with financial institutions	49,253	44,611
Securities available-for-sale	1,168,797	1,192,829
FHLBC and FRBC Stock	28,518	33,355
Mortgage servicing rights	10,564	10,344
Financial liabilities:
Noninterest bearing deposits	1,799,927	1,834,891
Other short-term borrowings	220,000	405,000
Junior subordinated debentures	25,773	25,773
Reported Value Measurement
Financial assets:
Cash and due from banks	48,841	55,534
Interest earning deposits with financial institutions	49,253	44,611
Securities available-for-sale	1,168,797	1,192,829
FHLBC and FRBC Stock	28,518	33,355
Loans held for sale	1,072	1,322
Net loans	3,925,298	3,998,689
Mortgage servicing rights	10,564	10,344
Interest rate swap agreements	5,947	5,302
Interest rate lock commitments and forward contracts	49	(10)
Interest receivable on securities and loans	25,735	27,159
Financial liabilities:
Noninterest bearing deposits	1,799,927	1,834,891
Interest bearing deposits	2,808,348	2,735,855
Securities sold under repurchase agreements	33,546	26,470
Other short-term borrowings	220,000
Junior subordinated debentures	25,773	405,000
Subordinated debentures	59,403	25,773
Senior notes		59,382
Interest rate swap agreements	8,917	8,234
Interest payable on deposits and borrowings	3,617	2,962
Estimate of Fair Value Measurement
Financial assets:
Cash and due from banks	48,841	55,534
Interest earning deposits with financial institutions	49,253	44,611
Securities available-for-sale	1,168,797	1,192,829
FHLBC and FRBC Stock	28,518	33,355
Loans held for sale	1,072	1,322
Net loans	3,841,563	3,876,381
Mortgage servicing rights	10,564	10,344
Interest rate swap agreements	5,947	5,302
Interest rate lock commitments and forward contracts	49	(10)
Interest receivable on securities and loans	25,735	27,159
Financial liabilities:
Noninterest bearing deposits	1,799,927	1,834,891
Interest bearing deposits	2,798,825	2,726,223
Securities sold under repurchase agreements	33,546	26,470
Other short-term borrowings	220,000
Junior subordinated debentures	20,619	405,000
Subordinated debentures	49,797	20,361
Senior notes		47,982
Interest rate swap agreements	8,917	8,324
Interest payable on deposits and borrowings	3,617	2,962
Fair Value, Inputs, Level 1
Financial assets:
Cash and due from banks	48,841	55,534
Interest earning deposits with financial institutions	49,253	44,611
Securities available-for-sale	171,000	169,574
Financial liabilities:
Noninterest bearing deposits	1,799,927	1,834,891
Fair Value, Inputs, Level 2
Financial assets:
Securities available-for-sale	982,409	1,007,926
FHLBC and FRBC Stock	28,518	33,355
Loans held for sale	1,072	1,322
Interest rate swap agreements	5,947	5,302
Interest rate lock commitments and forward contracts	49	(10)
Interest receivable on securities and loans	25,735	27,159
Financial liabilities:
Interest bearing deposits	2,798,825	2,726,223
Securities sold under repurchase agreements	33,546	26,470
Other short-term borrowings	220,000
Junior subordinated debentures	20,619	405,000
Subordinated debentures	49,797	20,361
Senior notes		47,982
Interest rate swap agreements	8,917	8,324
Interest payable on deposits and borrowings	3,617	2,962
Fair Value, Inputs, Level 3
Financial assets:
Securities available-for-sale	15,388	15,329
Net loans	3,841,563	3,876,381
Mortgage servicing rights	$ 10,564	$ 10,344

Derivatives, Hedging Activiti_3

Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk - Fair Value of Derivatives (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($) item	Mar. 31, 2023 USD ($)
Two financial institutions
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Cash collateral pledged with financial institutions, dollars	$ 6,600,000	$ 7,300,000
Number of financial institutions in which cash collateral pledged \| item		2
Interest Rate Swap [Member]
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Cash collateral pledged with financial institutions, dollars	5,700,000		$ 4,100,000
Investment securities pledged with financial institutions, dollars	$ 0	$ 0
Number of financial institutions in which cash collateral pledged \| item	1	1
Designated as Hedging Instrument
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative assets designated as hedging instruments, fair value	$ 3,361,000	$ 2,576,000
Derivative liabilities designated as hedging instruments, fair value	6,331,000	5,598,000
Designated as Hedging Instrument \| Interest Rate Products \| Cash flow hedges of certain variable rate commercial and commercial real estate loan pools
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional amount	300,000,000	300,000,000
Designated as Hedging Instrument \| Interest Rate Products \| Cash flow hedge of junior subordinated debentures and was executed to pay fixed and receive variable rate cash flows
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional amount	$ 25,800,000	$ 25,800,000
Designated as Hedging Instrument \| Interest Rate Products \| OSBC Affiliates
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative, number of transactions \| item	5	5
Notional amount	$ 325,774,000	$ 325,774,000
Derivative assets designated as hedging instruments, fair value	3,361,000
Derivative liabilities designated as hedging instruments, fair value	6,331,000	5,598,000
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| OSBC Affiliates
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative assets designated as hedging instruments, fair value		2,576,000
Not Designated as Hedging Instrument
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative assets designated as hedging instruments, fair value	2,689,000
Derivative liabilities designated as hedging instruments, fair value	2,586,000
Not Designated as Hedging Instrument \| Interest Rate Products
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional amount	$ 107,000,000	$ 104,800,000
Not Designated as Hedging Instrument \| Interest Rate Products \| Commercial Loan Customers
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative, number of transactions \| item	16	17
Notional amount	$ 106,958,000	$ 104,777,000
Derivative assets designated as hedging instruments, fair value	2,586,000	2,726,000
Derivative liabilities designated as hedging instruments, fair value	2,586,000	2,726,000
Not Designated as Hedging Instrument \| Commitments.
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional amount	$ 9,500,000	$ 8,400,000
Not Designated as Hedging Instrument \| Interest Rate Lock Commitments and Forward Contracts.
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative, number of transactions \| item	38	4
Notional amount	$ 9,487,000	$ 44,790,000
Derivative assets designated as hedging instruments, fair value	$ 49,000	$ 89,000
Not Designated as Hedging Instrument \| Interest Rate Lock Commitments and Forward Contracts. \| Commercial Loan Customers
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative, number of transactions \| item		24
Notional amount		$ 8,375,000
Derivative liabilities designated as hedging instruments, fair value		10,000
Not Designated as Hedging Instrument \| Other Contracts
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Derivative, number of transactions \| item	4
Notional amount	$ 46,687,000
Derivative assets designated as hedging instruments, fair value	54,000	2,805,000
Derivative liabilities designated as hedging instruments, fair value		$ 2,726,000
Interest Income
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Amount to be reclassified as an decrease to interest expense during the next twelve months	5,500,000
Interest Expense
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Amount to be reclassified as an decrease to interest expense during the next twelve months	$ 609,000

Derivatives, Hedging Activiti_4

Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk - Effect of Fair Value (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Amount of loss recognized in OCI on derivative	$ 2.1	$ 3.1
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 1.6	$ 1

Derivatives, Hedging Activiti_5

Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk - Commitments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Company's contractual commitments due to letters of credit
Total letters of credit	$ 30,478,000	$ 31,112,000
Allowance for credit loss on unfunded commitments	2,700,000
Decrease In allowance for credit loss on unfunded commitments	44,000
Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	791,000	735,000
Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	29,687,000	30,377,000
Commitments to Extend Credit to Borrowers [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	30,411,000	31,045,000
Commitments to Extend Credit to Borrowers [Member] \| Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	791,000	735,000
Commitments to Extend Credit to Borrowers [Member] \| Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	29,620,000	30,310,000
Commitments to Extend Credit to Borrowers [Member] \| Financial Standby Letter of Credit [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	17,505,000	16,794,000
Commitments to Extend Credit to Borrowers [Member] \| Financial Standby Letter of Credit [Member] \| Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	229,000	173,000
Commitments to Extend Credit to Borrowers [Member] \| Financial Standby Letter of Credit [Member] \| Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	17,276,000	16,621,000
Commitments to Extend Credit to Borrowers [Member] \| Performance Guarantee [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	12,906,000	14,251,000
Commitments to Extend Credit to Borrowers [Member] \| Performance Guarantee [Member] \| Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	562,000	562,000
Commitments to Extend Credit to Borrowers [Member] \| Performance Guarantee [Member] \| Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	12,344,000	13,689,000
Commitments to Extend Credit Nonborrowers [Member] \| Performance Guarantee [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	67,000	67,000
Commitments to Extend Credit Nonborrowers [Member] \| Performance Guarantee [Member] \| Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	67,000	67,000
Unused lines of Credit [Member]
Company's contractual commitments due to letters of credit
Loan commitments	778,313,000	835,265,000
Unused lines of Credit [Member] \| Fixed [Member]
Company's contractual commitments due to letters of credit
Loan commitments	148,769,000	140,305,000
Unused lines of Credit [Member] \| Variable [Member]
Company's contractual commitments due to letters of credit
Loan commitments	$ 629,544,000	$ 694,960,000

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 21,312	$ 23,607

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false