MidWestOne Financial (MOFG) 10-Q 4 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 02, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-35968
Entity Registrant Name	MIDWESTONE FINANCIAL GROUP, INC.
Entity Incorporation, State or Country Code	IA
Entity Tax Identification Number	42-1206172
Entity Address, Address Line One	102 South Clinton Street
Entity Address, City or Town	Iowa City
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	52240
City Area Code	319
Local Phone Number	356-5800
Title of 12(b) Security	Common stock, $1.00 par value
Trading Symbol	MOFG
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		15,691,751
Entity Central Index Key	0001412665
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 53,562	$ 65,078
Interest earning deposits in banks	84,952	17,409
Federal funds sold	0	172
Total cash and cash equivalents	138,514	82,659
Debt securities available for sale at fair value	2,136,902	1,657,381
Loans held for sale	58,679	59,956
Gross loans held for investment	3,278,150	3,496,790
Unearned income, net	(9,506)	(14,567)
Loans held for investment, net of unearned income	3,268,644	3,482,223
Allowance for credit losses	(47,900)	(55,500)
Total loans held for investment, net	3,220,744	3,426,723
Premises and equipment, net	84,130	86,401
Goodwill	62,477	62,477
Other intangible assets, net	21,130	25,242
Foreclosed assets, net	454	2,316
Other assets	152,393	153,493
Total assets	5,875,423	5,556,648
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest bearing deposits	999,887	910,655
Interest bearing deposits	3,957,894	3,636,394
Total deposits	4,957,781	4,547,049
Short-term borrowings	187,508	230,789
Long-term debt	154,860	208,691
Other liabilities	45,010	54,869
Total liabilities	5,345,159	5,041,398
Shareholders' equity
Preferred stock, no par value; authorized 500,000 shares; no shares issued and outstanding	0	0
Common stock, $1.00 par value; authorized 30,000,000 shares; issued shares of 16,581,017 and 16,581,017; outstanding shares of 15,729,451 and 16,016,780	16,581	16,581
Additional paid-in capital	300,327	300,137
Retained earnings	232,639	188,191
Treasury stock at cost, 851,566 and 564,237 shares	(22,735)	(14,251)
Accumulated other comprehensive income	3,452	24,592
Total shareholders' equity	530,264	515,250
Total liabilities and shareholders' equity	$ 5,875,423	$ 5,556,648

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	16,581,017	16,581,017
Common stock, shares outstanding (in shares)	15,729,451	16,016,780
Treasury stock (in shares)	851,566	564,237

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income
Loans, including fees	$ 36,115	$ 38,191	$ 107,393	$ 120,417
Taxable investment securities	6,655	4,574	18,231	12,937
Tax-exempt investment securities	2,428	2,360	7,532	5,730
Other	21	29	54	233
Total interest income	45,219	45,154	133,210	139,317
Interest expense
Deposits	3,150	5,296	10,167	19,654
Short-term borrowings	132	175	421	772
Long-term debt	1,597	1,874	5,160	4,964
Total interest expense	4,879	7,345	15,748	25,390
Net interest income	40,340	37,809	117,462	113,927
Credit loss (benefit) expense	(1,080)	4,992	(7,958)	31,410
Net interest income after credit loss (benefit) expense	41,420	32,817	125,420	82,517
Noninterest income
Investment services and trust activities	2,915	2,361	8,560	7,114
Service charges and fees	1,613	1,491	4,575	4,607
Card revenue	1,820	1,600	5,269	4,202
Loan revenue	1,935	3,252	9,816	6,285
Bank-owned life insurance	532	530	1,612	1,685
Investment securities gains, net	36	106	105	154
Other	331	230	1,287	3,947
Total noninterest income	9,182	9,570	31,224	27,994
Noninterest expense
Compensation and employee benefits	17,350	16,460	51,671	48,759
Occupancy expense of premises, net	2,547	2,278	7,063	6,872
Equipment	1,973	1,935	5,627	5,825
Legal and professional	1,272	1,184	3,430	4,101
Data processing	1,406	1,308	4,005	3,902
Marketing	1,022	857	2,901	2,829
Amortization of intangibles	1,264	1,631	4,112	5,407
FDIC insurance	435	470	1,192	1,363
Communications	275	428	1,055	1,334
Foreclosed assets, net	43	13	226	185
Goodwill impairment	0	31,500	0	31,500
Other	2,191	1,875	4,866	5,901
Total noninterest expense	29,778	59,939	86,148	117,978
Income (loss) before income tax expense	20,824	(17,552)	70,496	(7,467)
Income tax expense	4,513	2,272	15,266	2,620
Net income (loss)	$ 16,311	$ (19,824)	$ 55,230	$ (10,087)
Per common share information
Earnings (loss) - basic (in dollars per share)	$ 1.03	$ (1.23)	$ 3.47	$ (0.63)
Earnings (loss) - diluted (in dollars per share)	1.03	(1.23)	3.46	(0.63)
Dividends paid (in dollars per share)	$ 0.2250	$ 0.2200	$ 0.6750	$ 0.6600

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 16,311	$ (19,824)	$ 55,230	$ (10,087)
Unrealized (loss) gain from debt securities available for sale:
Unrealized net holding (loss) gain on debt securities available for sale arising during the period	(8,591)	1,726	(28,501)	21,917
Reclassification adjustment for gains included in net income	(36)	(106)	(105)	(154)
Income tax benefit (expense)	2,251	(423)	7,466	(5,680)
Unrealized net (loss) gain on debt securities available for sale, net of reclassification adjustment	(6,376)	1,197	(21,140)	16,083
Unrealized gain (loss) from cash flow hedging instruments:
Unrealized net holding gains (losses) in cash flow hedging instruments arising during the period	0	8	0	(1,009)
Reclassification adjustment for net loss in cash flow hedging instruments included in income	0	88	0	145
Income tax benefit (expense)	0	(25)	0	225
Unrealized net gains (losses) on cash flow hedge instruments, net of reclassification adjustment	0	71	0	(639)
Other comprehensive (loss) income, net of tax	(6,376)	1,268	(21,140)	15,444
Comprehensive income (loss)	$ 9,935	$ (18,556)	$ 34,090	$ 5,357

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Cumulative effect adjustment	[1]	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained EarningsCumulative effect adjustment	[1]	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2019		$ 508,982	$ (5,362)		$ 16,581	$ 297,390	$ 201,105	$ (5,362)		$ (10,466)	$ 4,372
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(10,087)					(10,087)
Other comprehensive income (loss)		15,444									15,444
Acquisition fair value finalization	[2]	2,355				2,355
Release/lapse of restriction on RSUs		(139)				(937)				798
Repurchase of common stock		(2,604)								(2,604)
Share-based compensation		1,131				1,131
Dividends paid on common stock		(10,639)					(10,639)
Ending balance at Sep. 30, 2020		499,081			16,581	299,939	175,017			(12,272)	19,816
Beginning balance at Jun. 30, 2020		520,781			16,581	299,542	198,382			(12,272)	18,548
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(19,824)					(19,824)
Other comprehensive income (loss)		1,268									1,268
Share-based compensation		397				397
Dividends paid on common stock		(3,541)				0	(3,541)
Ending balance at Sep. 30, 2020		499,081			16,581	299,939	175,017			(12,272)	19,816
Beginning balance at Dec. 31, 2020		515,250			16,581	300,137	188,191			(14,251)	24,592
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		55,230					55,230
Other comprehensive income (loss)		(21,140)									(21,140)
Release/lapse of restriction on RSUs		(118)				(1,332)	(29)			1,243
Repurchase of common stock		(9,727)								(9,727)
Share-based compensation		1,522				1,522
Dividends paid on common stock		(10,753)					(10,753)
Ending balance at Sep. 30, 2021		530,264			16,581	300,327	232,639			(22,735)	3,452
Beginning balance at Jun. 30, 2021		530,293			16,581	299,888	219,884			(15,888)	9,828
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		16,311					16,311
Other comprehensive income (loss)		(6,376)									(6,376)
Release/lapse of restriction on RSUs		0				(32)	(1)			33
Repurchase of common stock		(6,880)								(6,880)
Share-based compensation		471				471
Dividends paid on common stock		(3,555)					(3,555)
Ending balance at Sep. 30, 2021		$ 530,264			$ 16,581	$ 300,327	$ 232,639			$ (22,735)	$ 3,452
[1]	Reclassification pursuant to adoption of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.
[2]	Relates to the finalization of the purchase accounting adjustments for the ATBancorp acquisition. This purchase accounting adjustment had a $2.06 million impact on goodwill, $296 thousand impact on deferred income taxes, with the offsetting impact being to additional paid-in capital.

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Release/lapse of restriction on RSUs (in shares)	1,260	49,311	32,488
Repurchase of common stock (in shares)	235,277	336,640	95,340
Dividends paid on common stock (in dollars per share)	$ 0.2250	$ 0.6750	$ 0.6600
ATBancorp
Goodwill adjustments			$ 2,060
Deferred income taxes			$ 296

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 55,230	$ (10,087)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Credit loss (benefit) expense	(7,958)	31,410
Goodwill impairment	0	31,500
Depreciation, amortization, and accretion	71	4,054
Net change in premises and equipment due to writedown or sale	295	55
Share-based compensation	1,522	1,131
Net gain on sale or call of debt securities available for sale	(105)	(132)
Net change in foreclosed assets due to writedown or sale	163	125
Net gain on sale of loans held for sale	(6,696)	(5,519)
Origination of loans held for sale	(236,326)	(286,551)
Proceeds from sales of loans held for sale	244,299	284,374
Increase in cash surrender value of bank-owned life insurance	(1,339)	(1,317)
Decrease (increase) in deferred income taxes, net	2,013	(7,105)
Change in:
Other assets	7,514	(8,393)
Other liabilities	(11,494)	8,495
Net cash provided by operating activities	47,189	42,040
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	42,193	27,020
Proceeds from maturities and calls of debt securities available for sale	304,443	169,210
Purchases of debt securities available for sale	(856,739)	(746,101)
Net decrease (increase) in loans held for investment	225,479	(81,867)
Purchases of premises and equipment	(1,477)	(1,514)
Proceeds from sale of foreclosed assets	1,983	2,922
Proceeds from sale of premises and equipment	16	49
Net cash used in investing activities	(284,102)	(630,281)
Cash flows from financing activities:
Deposits	410,598	604,699
Short-term borrowings	(43,281)	44,544
Proceeds from issuance of subordinated debt	0	65,000
Payments of subordinated debt issuance costs	(9)	(1,248)
Redemption of subordinated debentures	(10,835)	0
Payments on finance lease liability	(107)	(94)
Payments of Federal Home Loan Bank borrowings	(43,000)	(44,400)
Payments of other long-term debt	0	(5,500)
Taxes paid relating to the release/lapse of restriction on RSUs	(118)	(139)
Dividends paid	(10,753)	(10,639)
Repurchase of common stock	(9,727)	(2,604)
Net cash provided by financing activities	292,768	649,619
Net increase in cash and cash equivalents	55,855	61,378
Cash and cash equivalents:
Beginning of Period	82,659	73,484
Ending balance	138,514	134,862
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	17,500	25,478
Cash paid during the period for income taxes	14,300	8,970
Supplemental schedule of non-cash investing and financing activities:
Transfer of loans to foreclosed assets, net	284	65
Investment securities purchased but not settled	$ 1,835	$ 10,690

Nature of Business and Signific

Nature of Business and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Significant Accounting Policies	Nature of Business and Significant Accounting Policies Nature of Business MidWest One Financial Group, Inc., an Iowa corporation formed in 1983, is a bank holding company under the BHCA and a financial holding company under the GLBA. Our principal executive offices are located at 102 South Clinton Street, Iowa City, Iowa 52240. The Company owns all of the outstanding common stock of MidWest One Bank, an Iowa state non-member bank chartered in 1934 with its main office in Iowa City, Iowa. We operate primarily through MidWest One Bank, our bank subsidiary. Basis of Presentation The accompanying interim condensed consolidated financial statements are prepared in accordance with GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, certain disclosures accompanying annual consolidated financial statements are omitted. In the opinion of management, all significant intercompany accounts and transactions have been eliminated and adjustments, consisting solely of normal recurring accruals and considered necessary for the fair presentation of financial statements for the interim periods, have been included. The current period's results of operations are not necessarily indicative of the results that ultimately may be achieved for the year. The interim condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 10-K for the year ended December 31, 2020, filed with the SEC on March 11, 2021. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect: (1) the reported amounts of assets and liabilities, (2) the disclosure of contingent assets and liabilities at the date of the financial statements, and (3) the reported amounts of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. The results for the nine months ended September 30, 2021 may not be indicative of results for the year ending December 31, 2021, or for any other period. All significant accounting policies followed in the preparation of the quarterly financial statements are disclosed in the Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 11, 2021. Segment Reporting The Company’s activities are considered to be one reportable segment. The Company is engaged in the business of commercial and retail banking, and trust and investment services, with operations throughout Iowa, the Minneapolis/St. Paul metropolitan area of Minnesota, western Wisconsin, Naples and Fort Myers, Florida, and Denver, Colorado. Substantially all income is derived from a diverse base of commercial, mortgage and retail lending activities, and investments. Effect of New Financial Accounting Standards Accounting Guidance Pending Adoption at September 30, 2021 On March 12, 2020, the FASB issued ASU 2020-04, Reference Rate Reform (ASC 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting

Debt Securities

Debt Securities	9 Months Ended
	Sep. 30, 2021
Debt Securities [Abstract]
Debt Securities	Debt Securities The amortized cost and fair value of investment debt securities AFS, with gross unrealized gains and losses, were as follows: As of September 30, 2021 (in thousands) Amortized Gross Gross Allowance for Credit Loss related to Debt Securities Fair Value U.S. Government agencies and corporations $ 286 $ 2 $ — $ — $ 288 State and political subdivisions 696,306 9,671 4,696 — 701,281 Mortgage-backed securities 108,445 1,280 494 — 109,231 Collateralized mortgage obligations 860,623 2,564 9,354 — 853,833 Corporate debt securities 466,570 8,380 2,681 — 472,269 Total debt securities $ 2,132,230 $ 21,897 $ 17,225 $ — $ 2,136,902 As of December 31, 2020 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Allowance for Credit Loss related to Debt Securities Fair Value U.S. Government agencies and corporations $ 355 $ 6 $ — $ — $ 361 State and political subdivisions 611,666 17,163 483 — 628,346 Mortgage-backed securities 92,261 1,758 1 — 94,018 Collateralized mortgage obligations 559,718 6,332 214 — 565,836 Corporate debt securities 360,103 9,333 616 — 368,820 Total debt securities $ 1,624,103 $ 34,592 $ 1,314 $ — $ 1,657,381 Investment securities with a fair value of $542.4 million and $434.7 million at September 30, 2021 and December 31, 2020, respectively, were pledged on public deposits, securities sold under agreements to repurchase and for other purposes, as required or permitted by law. The following table presents debt securities AFS in an unrealized loss position for which an allowance for credit losses has not been recorded at September 30, 2021, aggregated by investment category and length of time in a continuous loss position: As of September 30, 2021 Number of Securities Less than 12 Months 12 Months or More Total Available for Sale Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands, except number of securities) State and political subdivisions 127 $ 254,630 $ 4,447 $ 12,474 $ 249 $ 267,104 $ 4,696 Mortgage-backed securities 7 45,955 494 44 — 45,999 494 Collateralized mortgage obligations 35 607,333 8,913 25,716 441 633,049 9,354 Corporate debt securities 25 126,945 1,866 18,094 815 145,039 2,681 Total 194 $ 1,034,863 $ 15,720 $ 56,328 $ 1,505 $ 1,091,191 $ 17,225 As of September 30, 2021, 127 state and political subdivisions securities with total unrealized losses of $4.7 million were held by the Company. Management evaluated these securities through a process that included consideration of credit agency ratings and payment history. In addition, management may evaluate securities by considering the yield spread to treasury securities and the most recent financial information available. Based on this evaluation, management concluded that the decline in fair value was not attributable to credit losses. As of September 30, 2021, 7 mortgage-backed securities and 35 collateralized mortgage obligations with unrealized losses totaling $9.8 million were held by the Company. Management evaluated the payment history of these securities. In addition, management considered the implied U.S. government guarantee of these agency securities and the level of credit enhancement for non-agency securities. Based on this evaluation, management concluded that the decline in fair value was not attributable to credit losses. As of September 30, 2021, 25 corporate debt securities with total unrealized losses of $2.7 million were held by the Company. Management evaluated these securities by considering credit agency ratings and payment history. In addition, management may evaluate securities by considering the yield spread to treasury securities and the most recent financial information available. Based on this evaluation, management concluded that the decline in fair value was not attributable to credit losses. Accrued interest receivable on available for sale debt securities, which is recorded within 'Other Assets,' totaled $8.1 million at September 30, 2021 and $7.3 million at December 31, 2020 and is excluded from the estimate of credit losses. The following table presents debt securities AFS in an unrealized loss position for which an allowance for credit losses has not been recorded at December 31, 2020, aggregated by investment category and length of time in a continuous loss position: As of December 31, 2020 Available for Sale Number of Securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands, except number of securities) State and political subdivisions 27 $ 31,489 $ 157 $ 4,065 $ 326 $ 35,554 $ 483 Mortgage-backed securities 7 315 1 — — 315 1 Collateralized mortgage obligations 8 133,032 214 — — 133,032 214 Corporate debt securities 15 35,995 523 3,311 93 39,306 616 Total 57 $ 200,831 $ 895 $ 7,376 $ 419 $ 208,207 $ 1,314 Proceeds and gross realized gains and losses on debt securities available for sale for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended Nine Months Ended (in thousands) September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Proceeds from sales of debt securities available for sale $ 782 $ 4,885 $ 42,193 $ 27,020 Gross realized gains from sales of debt securities available for sale 32 105 856 255 Gross realized losses from sales of debt securities available for sale — (10) (791) (123) Net realized gain from sales of debt securities available for sale (1) $ 32 $ 95 $ 65 $ 132 (1) The difference in investment security gains, net reported herein as compared to the Consolidated Statements of Income is associated with the net realized gain from the call or maturity of debt securities of $4.0 thousand and $40.0 thousand for the three and nine months ended ended September 30, 2021, respectively, and $11.0 thousand and $22.0 thousand for the three and nine months ended September 30, 2020, respectively. The contractual maturity distribution of investment debt securities at September 30, 2021, is shown below. Expected maturities of MBS and CMO may differ from contractual maturities because the mortgages underlying the securities may be called or prepaid without any penalties. Therefore, these securities are not included in the maturity categories in the following summary. Available For Sale (in thousands) Amortized Cost Fair Value Due in one year or less $ 47,732 $ 48,263 Due after one year through five years 309,686 314,874 Due after five years through ten years 477,290 479,402 Due after ten years 328,454 331,299 $ 1,163,162 $ 1,173,838 Mortgage-backed securities 108,445 109,231 Collateralized mortgage obligations 860,623 853,833 Total $ 2,132,230 $ 2,136,902

Loans Receivable and the Allowa

Loans Receivable and the Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans Receivable and the Allowance for Credit Losses	Loans Receivable and the Allowance for Credit Losses The composition of loans by class of receivable was as follows: As of (in thousands) September 30, 2021 December 31, 2020 Agricultural $ 106,356 $ 116,392 Commercial and industrial 927,258 1,055,488 Commercial real estate: Construction & development 146,417 181,291 Farmland 130,936 144,970 Multifamily 273,347 256,525 Commercial real estate-other 1,148,658 1,149,575 Total commercial real estate 1,699,358 1,732,361 Residential real estate: One- to four- family first liens 334,267 355,684 One- to four- family junior liens 133,869 143,422 Total residential real estate 468,136 499,106 Consumer 67,536 78,876 Loans held for investment, net of unearned income 3,268,644 3,482,223 Allowance for credit losses (47,900) (55,500) Total loans held for investment, net $ 3,220,744 $ 3,426,723 Loans with unpaid principal in the amount of $815.0 million and $830.2 million at September 30, 2021 and December 31, 2020, respectively, were pledged to the FHLB as collateral for borrowings. Non-accrual and Delinquent Status Loans are placed on non-accrual when (1) payment in full of principal and interest is no longer expected or (2) principal or interest has been in default for 90 days or more unless the loan is both well secured with marketable collateral and in the process of collection. All loans rated doubtful or worse, and certain loans rated substandard, are placed on non-accrual. A non-accrual loan may be restored to an accrual status when (1) all past due principal and interest has been paid (excluding renewals and modifications that involve the capitalizing of interest) or (2) the loan becomes well secured with marketable collateral and is in the process of collection. An established track record of performance is also considered when determining accrual status. Loans are considered past due or delinquent when the contractual principal or interest due in accordance with the terms of the loan agreement or any portion thereof remains unpaid after the due date of the scheduled payment. The following table presents the amortized cost basis of loans based on delinquency status: Age Analysis of Past-Due Financial Assets 90 Days or More Past Due And Accruing (in thousands) Current 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total September 30, 2021 Agricultural $ 105,402 $ 152 $ — $ 802 $ 106,356 $ — Commercial and industrial 924,379 351 313 2,215 927,258 50 Commercial real estate: Construction and development 145,714 107 — 596 146,417 — Farmland 127,930 — 119 2,887 130,936 — Multifamily 271,960 — 1,387 — 273,347 — Commercial real estate-other 1,142,251 948 — 5,459 1,148,658 — Total commercial real estate 1,687,855 1,055 1,506 8,942 1,699,358 — Residential real estate: One- to four- family first liens 330,912 2,280 845 230 334,267 — One- to four- family junior liens 133,481 261 20 107 133,869 1 Total residential real estate 464,393 2,541 865 337 468,136 1 Consumer 67,458 41 23 14 67,536 — Total $ 3,249,487 $ 4,140 $ 2,707 $ 12,310 $ 3,268,644 $ 51 December 31, 2020 Agricultural $ 115,284 $ 8 $ 45 $ 1,055 $ 116,392 $ — Commercial and industrial 1,051,727 477 333 2,951 1,055,488 106 Commercial real estate: Construction and development 180,059 586 42 604 181,291 — Farmland 138,798 226 324 5,622 144,970 — Multifamily 256,525 — — — 256,525 — Commercial real estate-other 1,132,015 11,514 318 5,728 1,149,575 — Total commercial real estate 1,707,397 12,326 684 11,954 1,732,361 — Residential real estate: One- to four- family first liens 351,370 2,062 566 1,686 355,684 625 One- to four- family junior liens 142,663 377 234 148 143,422 — Total residential real estate 494,033 2,439 800 1,834 499,106 625 Consumer 78,747 43 39 47 78,876 8 Total $ 3,447,188 $ 15,293 $ 1,901 $ 17,841 $ 3,482,223 $ 739 The following table presents the amortized cost basis of loans on non-accrual status, amortized cost basis of loans on non-accrual status with no allowance for credit losses recorded, and loans past due 90 days or more and still accruing by class of loan as of September 30, 2021 and December 31, 2020: Nonaccrual Nonaccrual with no Allowance for Credit Losses 90 Days or More Past Due And Accruing (in thousands) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Agricultural $ 2,120 $ 2,584 $ 1,366 $ 1,599 $ — $ — Commercial and industrial 4,145 7,326 1,341 4,349 50 106 Commercial real estate: Construction and development 607 1,145 596 900 — — Farmland 6,755 8,319 5,338 7,266 — — Multifamily 1,009 746 331 39 — — Commercial real estate-other 16,811 19,134 1,076 2,497 — — Total commercial real estate 25,182 29,344 7,341 10,702 — — Residential real estate: One- to four- family first liens 1,532 1,895 339 75 — 625 One- to four- family junior liens 628 722 — 1 1 — Total residential real estate 2,160 2,617 339 76 1 625 Consumer 50 79 8 13 — 8 Total $ 33,657 $ 41,950 $ 10,395 $ 16,739 $ 51 $ 739 The interest income recognized on loans that were on nonaccrual for the three months ended September 30, 2021 and September 30, 2020 was $453 thousand and $130 thousand, respectively. The interest income recognized on loans that were on nonaccrual for the nine months ended September 30, 2021 and September 30, 2020 was $1.1 million and $526 thousand, respectively. Credit Quality Information The Company aggregates loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as: current financial information, historical payment experience, credit documentation, and other factors. The Company analyzes loans individually to classify the loans as to credit risk. This analysis includes non-homogenous loans, such as agricultural, commercial and industrial, and commercial real estate loans. Loans not meeting the criteria described below that are analyzed individually are considered to be pass-rated. The Company uses the following definitions for risk ratings: Special Mention/Watch - A special mention/watch asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Special mention/watch assets are not adversely classified and do not expose the Company to sufficient risk to warrant adverse classification. Substandard - Substandard loans are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful - Loans classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently known facts, conditions and values, highly questionable and improbable. Loss - Loans classified as loss are considered uncollectible and of such little value that their continuance as bankable assets is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value but rather it is not practical or desirable to defer writing off this basically worthless asset even though partial recovery may be affected in the future. Homogenous loans, including residential real estate and consumer loans, are not individually risk rated. Instead, these loans are categorized based on performance: performing and nonperforming. Nonperforming loans include those loans on nonaccrual and loans greater than 90 days past due and on accrual. The following table sets forth the amortized cost basis of loans by class of receivable by credit quality indicator and vintage based on the most recent analysis performed, as of September 30, 2021. As of September 30, 2021, there were no 'loss' rated credits. Term Loans by Origination Year Revolving Loans September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Total Agricultural Pass $ 21,302 $ 9,886 $ 4,979 $ 1,440 $ 1,126 $ 1,407 $ 55,410 $ 95,550 Special mention / watch 1,220 405 275 — 75 1,000 4,066 7,041 Substandard 673 759 133 229 6 278 1,687 3,765 Doubtful — — — — — — — — Total $ 23,195 $ 11,050 $ 5,387 $ 1,669 $ 1,207 $ 2,685 $ 61,163 $ 106,356 Commercial and industrial Pass $ 245,228 $ 236,565 $ 80,280 $ 41,016 $ 65,928 $ 98,838 $ 136,230 $ 904,085 Special mention / watch 5,485 1,900 704 143 296 139 1,892 10,559 Substandard 1,104 2,154 1,046 924 220 3,016 4,149 12,613 Doubtful — — — — 1 — — 1 Total $ 251,817 $ 240,619 $ 82,030 $ 42,083 $ 66,445 $ 101,993 $ 142,271 $ 927,258 CRE - Construction and development Pass $ 53,757 $ 54,553 $ 7,950 $ 3,266 $ 1,872 $ 922 $ 20,967 $ 143,287 Special mention / watch 622 — 172 406 — — — 1,200 Substandard — 894 1,025 — — 11 — 1,930 Doubtful — — — — — — — — Total $ 54,379 $ 55,447 $ 9,147 $ 3,672 $ 1,872 $ 933 $ 20,967 $ 146,417 CRE - Farmland Pass $ 31,894 $ 36,063 $ 19,419 $ 5,175 $ 6,014 $ 12,113 $ 1,489 $ 112,167 Special mention / watch 1,727 4,092 587 1,421 295 225 75 8,422 Substandard 2,599 2,050 1,465 1,971 1,667 595 — 10,347 Doubtful — — — — — — — — Total $ 36,220 $ 42,205 $ 21,471 $ 8,567 $ 7,976 $ 12,933 $ 1,564 $ 130,936 CRE - Multifamily Pass $ 85,674 $ 130,248 $ 25,013 $ 2,800 $ 6,492 $ 4,929 $ 7,589 $ 262,745 Special mention / watch — — — 5,983 — 558 — 6,541 Substandard — 2,737 — — — 1,324 — 4,061 Doubtful — — — — — — — — Total $ 85,674 $ 132,985 $ 25,013 $ 8,783 $ 6,492 $ 6,811 $ 7,589 $ 273,347 CRE - other Pass $ 243,842 $ 435,676 $ 104,778 $ 41,412 $ 66,205 $ 81,287 $ 44,819 $ 1,018,019 Special mention / watch 5,842 25,278 2,507 10,024 1,832 2,166 1,459 49,108 Substandard 4,309 50,557 12,568 6,163 979 6,955 — 81,531 Doubtful — — — — — — — — Total $ 253,993 $ 511,511 $ 119,853 $ 57,599 $ 69,016 $ 90,408 $ 46,278 $ 1,148,658 RRE - One- to four- family first liens Performing $ 96,842 $ 83,033 $ 31,181 $ 27,093 $ 18,761 $ 71,848 $ 3,978 $ 332,736 Nonperforming 478 47 — 188 164 654 — 1,531 Total $ 97,320 $ 83,080 $ 31,181 $ 27,281 $ 18,925 $ 72,502 $ 3,978 $ 334,267 RRE - One- to four- family junior liens Performing $ 26,283 $ 14,437 $ 4,860 $ 6,132 $ 4,364 $ 5,471 $ 71,692 $ 133,239 Nonperforming — — 139 166 17 203 105 630 Total $ 26,283 $ 14,437 $ 4,999 $ 6,298 $ 4,381 $ 5,674 $ 71,797 $ 133,869 Consumer Performing $ 26,150 $ 18,297 $ 7,134 $ 5,164 $ 2,044 $ 5,800 $ 2,897 $ 67,486 Nonperforming — — 16 8 14 12 — 50 Total $ 26,150 $ 18,297 $ 7,150 $ 5,172 $ 2,058 $ 5,812 $ 2,897 $ 67,536 Total by Credit Quality Indicator Category Pass $ 681,697 $ 902,991 $ 242,419 $ 95,109 $ 147,637 $ 199,496 $ 266,504 $ 2,535,853 Special mention / watch 14,896 31,675 4,245 17,977 2,498 4,088 7,492 82,871 Substandard 8,685 59,151 16,237 9,287 2,872 12,179 5,836 114,247 Doubtful — — — — 1 — — 1 Performing 149,275 115,767 43,175 38,389 25,169 83,119 78,567 533,461 Nonperforming 478 47 155 362 195 869 105 2,211 Total $ 855,031 $ 1,109,631 $ 306,231 $ 161,124 $ 178,372 $ 299,751 $ 358,504 $ 3,268,644 The following table sets forth the amortized cost basis of loans by class of receivable by credit quality indicator and vintage based on the most recent analysis performed, as of December 31, 2020. As of December 31, 2020, there were no 'loss' rated credits. Term Loans by Origination Year Revolving Loans December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Total Agricultural Pass $ 17,836 $ 6,959 $ 2,764 $ 2,145 $ 1,386 $ 1,833 $ 60,802 $ 93,725 Special mention / watch 4,892 1,083 117 108 553 1,103 7,210 15,066 Substandard 4,075 650 258 183 121 226 2,086 7,599 Doubtful 1 — — — — 1 — 2 Total $ 26,804 $ 8,692 $ 3,139 $ 2,436 $ 2,060 $ 3,163 $ 70,098 $ 116,392 Commercial and industrial Pass $ 546,171 $ 105,523 $ 57,055 $ 61,753 $ 38,695 $ 92,526 $ 120,498 $ 1,022,221 Special mention / watch 3,410 572 497 2,261 611 112 4,796 12,259 Substandard 5,014 1,539 928 656 461 3,261 9,144 21,003 Doubtful — — — 1 — 3 1 5 Total $ 554,595 $ 107,634 $ 58,480 $ 64,671 $ 39,767 $ 95,902 $ 134,439 $ 1,055,488 CRE - Construction and development Pass $ 109,885 $ 25,972 $ 14,994 $ 2,696 $ 679 $ 876 $ 22,519 $ 177,621 Special mention / watch 843 298 542 — 9 3 — 1,695 Substandard 597 1,132 220 — — 26 — 1,975 Doubtful — — — — — — — — Total $ 111,325 $ 27,402 $ 15,756 $ 2,696 $ 688 $ 905 $ 22,519 $ 181,291 CRE - Farmland Pass $ 48,378 $ 25,022 $ 9,577 $ 10,490 $ 8,378 $ 13,003 $ 1,263 $ 116,111 Special mention / watch 8,088 4,583 935 660 361 237 — 14,864 Substandard 3,924 2,627 4,386 1,728 166 1,128 36 13,995 Doubtful — — — — — — — — Total $ 60,390 $ 32,232 $ 14,898 $ 12,878 $ 8,905 $ 14,368 $ 1,299 $ 144,970 CRE - Multifamily Pass $ 164,817 $ 18,992 $ 17,805 $ 10,706 $ 10,201 $ 19,581 $ 11,558 $ 253,660 Special mention / watch 345 — — — 59 — — 404 Substandard 1,099 — — — 1,362 — — 2,461 Doubtful — — — — — — — — Total $ 166,261 $ 18,992 $ 17,805 $ 10,706 $ 11,622 $ 19,581 $ 11,558 $ 256,525 CRE - other Pass $ 487,771 $ 129,388 $ 60,957 $ 83,393 $ 66,369 $ 91,698 $ 45,129 $ 964,705 Special mention / watch 71,141 14,870 12,415 5,953 3,756 4,335 455 112,925 Substandard 48,690 7,162 6,370 1,222 579 6,997 925 71,945 Doubtful — — — — — — — — Total $ 607,602 $ 151,420 $ 79,742 $ 90,568 $ 70,704 $ 103,030 $ 46,509 $ 1,149,575 RRE - One- to four- family first liens Performing $ 117,923 $ 46,581 $ 42,875 $ 30,628 $ 37,407 $ 68,501 $ 9,249 $ 353,164 Nonperforming 239 1 596 303 148 1,233 — 2,520 Total $ 118,162 $ 46,582 $ 43,471 $ 30,931 $ 37,555 $ 69,734 $ 9,249 $ 355,684 RRE - One- to four- family junior liens Performing $ 19,818 $ 7,973 $ 12,140 $ 6,152 $ 3,467 $ 5,354 $ 87,795 $ 142,699 Nonperforming 7 — 223 17 116 190 170 723 Total $ 19,825 $ 7,973 $ 12,363 $ 6,169 $ 3,583 $ 5,544 $ 87,965 $ 143,422 Consumer Performing $ 30,755 $ 13,662 $ 10,341 $ 4,960 $ 2,656 $ 6,306 $ 10,118 $ 78,798 Nonperforming 2 21 13 5 13 24 — 78 Total $ 30,757 $ 13,683 $ 10,354 $ 4,965 $ 2,669 $ 6,330 $ 10,118 $ 78,876 Total by Credit Quality Indicator Category Pass $ 1,374,858 $ 311,856 $ 163,152 $ 171,183 $ 125,708 $ 219,517 $ 261,769 $ 2,628,043 Special mention / watch 88,719 21,406 14,506 8,982 5,349 5,790 12,461 157,213 Substandard 63,399 13,110 12,162 3,789 2,689 11,638 12,191 118,978 Doubtful 1 — — 1 — 4 1 7 Performing 168,496 68,216 65,356 41,740 43,530 80,161 107,162 574,661 Nonperforming 248 22 832 325 277 1,447 170 3,321 Total $ 1,695,721 $ 414,610 $ 256,008 $ 226,020 $ 177,553 $ 318,557 $ 393,754 $ 3,482,223 Allowance for Credit Losses At September 30, 2021, the economic forecast used by the Company showed the following: (1) Midwest unemployment – decreases over the next four forecasted quarters; (2) Year-to-year change in national retail sales - increases over the next four forecasted quarters; (3) Year-to-year change in CRE Index - decreases over the next two forecasted quarters, followed by an increase in the third and fourth forecasted quarters; (4) Year-to-year change in U.S. GDP - increases over the next four forecasted quarters; (5) Year-to-year change in National Home Price Index – increases over the next four forecasted quarters; and (6) Rental Vacancy - increases over the next four forecasted quarters. The economic forecast loss driver data generally exhibited improvements in the economic forecast and stabilization of the credit profile outlook when compared to the previously disclosed second quarter of 2021 results. We have made a policy election to report interest receivable as a separate line on the balance sheet. Accrued interest receivable, which is recorded within 'Other Assets', totaled $10.8 million at September 30, 2021 and $14.2 million at December 31, 2020 and is excluded from the estimate of credit losses. The changes in the allowance for credit losses by portfolio segment were as follows: For the Three Months Ended September 30, 2021 and 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total For the Three Months Ended September 30, 2021 Beginning balance $ 1,013 $ 13,787 $ 28,516 $ 4,076 $ 608 $ 48,000 Charge-offs (16) (24) (37) (1) (156) (234) Recoveries 19 954 76 25 40 1,114 Credit loss (benefit) expense (1) 44 1,058 (2,226) 5 139 (980) Ending balance $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 For the Three Months Ended September 30, 2020 Beginning balance $ 1,408 $ 18,709 $ 28,221 $ 6,074 $ 1,232 $ 55,644 Charge-offs (746) (983) (275) (83) (101) (2,188) Recoveries 103 180 9 14 41 347 Credit loss (benefit) expense (1) 649 (1,267) 2,966 2,273 76 4,697 Ending balance $ 1,414 $ 16,639 $ 30,921 $ 8,278 $ 1,248 $ 58,500 (1) The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss (benefit) expense of $(0.1) million and $0.3 million related to off-balance sheet credit exposures for the three months ended September 30, 2021 and September 30, 2020, respectively. For the Nine Months Ended September 30, 2021 and 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total For the Nine Months Ended September 30, 2021 Beginning balance $ 1,346 $ 15,689 $ 32,640 $ 4,882 $ 943 $ 55,500 Charge-offs (170) (885) (453) (107) (462) (2,077) Recoveries 67 1,560 391 81 136 2,235 Credit loss (benefit) expense (1) (183) (589) (6,249) (751) 14 (7,758) Ending balance $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 For the Nine Months Ended September 30, 2020 Beginning balance $ 3,748 $ 8,394 $ 13,804 $ 2,685 $ 448 $ 29,079 Day 1 transition adjustment from adoption of ASC 326 (2,557) 2,728 1,300 2,050 463 3,984 Charge-offs (939) (2,356) (1,787) (186) (520) (5,788) Recoveries 129 559 28 29 137 882 Credit loss expense 1,033 7,314 17,576 3,700 720 30,343 Ending balance $ 1,414 $ 16,639 $ 30,921 $ 8,278 $ 1,248 $ 58,500 (1) The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss (benefit) expense of $(0.2) million and $1.1 million related to off-balance sheet credit exposures for the nine months ended September 30, 2021 and September 30, 2020, respectively. The composition of allowance for credit losses by portfolio segment based on evaluation method were as follows: As of September 30, 2021 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total Loans held for investment, net of unearned income Individually evaluated for impairment $ 1,366 $ 3,084 $ 24,650 $ 570 $ 8 $ 29,678 Collectively evaluated for impairment 104,990 924,174 1,674,708 467,566 67,528 3,238,966 Total $ 106,356 $ 927,258 $ 1,699,358 $ 468,136 $ 67,536 $ 3,268,644 Allowance for credit losses: Individually evaluated for impairment $ — $ 708 $ 2,008 $ 230 $ — $ 2,946 Collectively evaluated for impairment 1,060 15,067 24,321 3,875 631 44,954 Total $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 As of December 31, 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total Loans held for investment, net of unearned income Individually evaluated for impairment $ 2,088 $ 6,582 $ 28,235 $ 427 $ 8 $ 37,340 Collectively evaluated for impairment 114,304 1,048,906 1,704,126 498,679 78,868 3,444,883 Total $ 116,392 $ 1,055,488 $ 1,732,361 $ 499,106 $ 78,876 $ 3,482,223 Allowance for credit losses: Individually evaluated for impairment $ 66 $ 799 $ 2,031 $ 179 $ — $ 3,075 Collectively evaluated for impairment 1,280 14,890 30,609 4,703 943 52,425 Total $ 1,346 $ 15,689 $ 32,640 $ 4,882 $ 943 $ 55,500 The following table presents the amortized cost basis of collateral dependent loans, by the primary collateral type, which are individually evaluated to determine expected credit losses, and the related ACL allocated to these loans: As of September 30, 2021 (in thousands) Primary Type of Collateral Real Estate Equipment Other Total ACL Allocation Agricultural $ 934 $ 432 $ — $ 1,366 $ — Commercial and industrial 407 391 2,286 3,084 708 Commercial real estate: Construction and development 595 — — 595 — Farmland 6,438 — — 6,438 53 Multifamily 1,009 — — 1,009 401 Commercial real estate-other 16,387 — 221 16,608 1,554 Residential real estate: One- to four- family first liens 404 — — 404 64 One- to four- family junior liens 166 — — 166 166 Consumer — 8 — 8 — Total $ 26,340 $ 831 $ 2,507 $ 29,678 $ 2,946 As of December 31, 2020 (in thousands) Primary Type of Collateral Real Estate Equipment Other Total ACL Allocation Agricultural $ 516 $ 824 $ 748 $ 2,088 $ 66 Commercial and industrial 667 3,037 2,878 6,582 799 Commercial real estate: Construction and development 899 — — 899 — Farmland 7,850 — — 7,850 88 Multifamily 746 — — 746 202 Commercial real estate-other 18,740 — — 18,740 1,741 Residential real estate: One- to four- family first liens 204 — — 204 132 One- to four- family junior liens 223 — — 223 47 Consumer — 8 — 8 — Total $ 29,845 $ 3,869 $ 3,626 $ 37,340 $ 3,075 Troubled Debt Restructurings TDRs totaled $19.8 million and $11.0 million as of September 30, 2021 and December 31, 2020, respectively. As of September 30, 2021, the Company had $8 thousand of commitments to lend additional funds to borrowers with loans classified as TDR. The following table sets forth information on the Company's TDRs by class of financing receivable occurring during the stated periods. TDRs include multiple concessions, and the disclosure classifications in the table are based on the primary concession provided to the borrower. Three Months Ended September 30, 2021 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (dollars in thousands) CONCESSION - Interest rate reduction Commercial and industrial — $ — $ — 1 $ 143 $ 143 CONCESSION - Extended maturity date Commercial real estate-other 2 9,717 9,623 — — — One- to four- family first liens — — — 1 128 132 CONCESSION - Other Agricultural — — — 1 59 69 Farmland — — — 1 150 161 Total 2 $ 9,717 $ 9,623 4 $ 480 $ 505 Nine Months Ended September 30, 2021 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (dollars in thousands) CONCESSION - Interest rate reduction Commercial and industrial — $ — $ — 1 $ 143 $ 143 Farmland 2 1,982 1,982 — — — One- to four- family first liens 1 171 171 — — — CONCESSION - Extended maturity date Commercial real estate-other 2 9,717 9,623 3 759 808 One- to four- family first liens 2 178 178 3 274 278 CONCESSION - Other Agricultural — — — 2 267 278 Farmland — — — 3 504 514 Commercial real estate-other 1 44 44 — — — One- to four- family first liens 1 150 150 — — — Total 9 $ 12,242 $ 12,148 12 $ 1,947 $ 2,021 Loans by class of financing receivable modified as TDRs that redefaulted within 12 months subsequent to restructure during the stated periods were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment (dollars in thousands) CONCESSION - Extended maturity date One- to four- family first liens — — 2 $ 203 — — 2 $ 203 CONCESSION - Other Agricultural — — 1 59 — — 1 59 Farmland — — 1 150 — — 1 150 Total — $ — 4 $ 412 — $ — 4 $ 412 Modifications in response to COVID-19: The Company began offering short-term loan modifications to assist borrowers during the COVID-19 pandemic. The CARES Act, as extended by the CAA, along with a joint interagency statement issued by the federal banking agencies, provide that short-term modifications made in response to COVID-19 do not need to be accounted for as a TDR. Accordingly, the Company does not account for such loan modifications as TDRs. The Company's loan modifications allow for the initial deferral of three months of principal and/or interest. The deferred interest is due and payable at the end of the deferral period, and the deferred principal is due and payable on the maturity date. At September 30, 2021, the outstanding balance of loans modified as a result of the COVID-19 pandemic totaled $4.5 million. The program is ongoing and additional loans continue to be granted deferrals.

Derivatives, Hedging Activities

Derivatives, Hedging Activities and Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives, Hedging Activities and Balance Sheet Offsetting	Derivatives, Hedging Activities and Balance Sheet Offsetting The following table presents the total notional amounts and gross fair values of the Company’s derivatives as of the dates indicated. The derivative asset and liability balances are presented on a gross basis, prior to the application of master netting agreements, as included in other assets and other liabilities, respectively, on the consolidated balance sheets. The fair values of the Company's derivative instrument assets and liabilities are summarized as follows: As of September 30, 2021 As of December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value (in thousands) Assets Liabilities Assets Liabilities Designated as hedging instruments: Fair value hedges: Interest rate swaps $ 24,994 $ 381 $ 1,542 $ 25,559 $ 34 $ 2,452 Total $ 24,994 $ 381 $ 1,542 $ 25,559 $ 34 $ 2,452 Not designated as hedging instruments: Interest rate swaps $ 351,227 $ 6,014 $ 6,023 $ 347,380 $ 10,758 $ 10,807 RPAs - protection sold 4,291 — — 4,471 4 — RPAs - protection purchased 9,680 — 2 9,825 — 8 Interest rate lock commitments 23,839 316 — — — — Interest rate forward loan sales contracts 24,217 — 107 — — — Total $ 413,254 $ 6,330 $ 6,132 $ 361,676 $ 10,762 $ 10,815 Derivatives Designated as Hedging Instruments The Company uses derivative instruments to hedge its exposure to economic risks, including interest rate, liquidity, and credit risk. Certain hedging relationships are formally designated and qualify for hedge accounting under GAAP as fair value or cash flow hedges. Fair Value Hedges - Derivatives are designated as fair value hedges to limit the Company's exposure to changes in the fair value of assets or liabilities due to movements in interest rates. The Company entered into pay-fixed receive-floating interest rate swaps to manage its exposure to changes in fair value in certain fixed-rate assets. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest income. Cash Flow Hedges - Derivatives are designated as cash flow hedges in order to minimize the variability in cash flows of earning assets or forecasted transactions caused by movement in interest rates. In February 2020, the Company entered into a pay-fixed receive-variable interest rate swap with a notional amount of $30.0 million to hedge against adverse fluctuations in interest rates by reducing exposure to variability in cash flows relating to interest payments on the Company's variable rate debt. The interest rate swap was designated as a cash flow hedge. The gain or loss on the derivative was recorded in accumulated other comprehensive income and subsequently reclassified into interest expense in the same period(s) during which the hedged transaction affects earnings. The Company terminated its cash flow hedge in the fourth quarter of 2020. The table below presents the effect of cash flow hedge accounting on AOCI for three and nine months ended September 30, 2021 and 2020. Amount of Gain (Loss) Recognized in AOCI on Derivative Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Three Months Ended September 30, Three Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps $ — $ 8 Interest Expense $ — $ (88) Amount of Gain (Loss) Recognized in AOCI on Derivative Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Nine Months Ended September 30, Nine Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps $ — $ (1,009) Interest Expense $ — $ (145) The table below presents the effect of the Company’s derivative financial instruments designated as hedging instruments on the consolidated statements of income for the periods indicated: Location and Amount of Gain or Loss Recognized in Income on Fair Value and Cash Flow Hedging Relationships For the Three Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 (in thousands) Interest Income Other Income Interest Income Other Income Interest Income Other Income Interest Income Other Income Total amounts of income and expense line items presented in the consolidated statements of income in which the effects of fair value or cash flow hedges are recorded $ (110) $ — $ (102) $ — $ (329) $ — $ (229) $ — The effects of fair value and cash flow hedging: Gain (loss) on fair value hedging relationships in subtopic 815-20: Interest contracts: Hedged items (199) — (174) — (1,254) — 1,814 — Derivative designated as hedging instruments 157 — 180 — 910 — (1,813) — Income statement effect of cash flow hedging relationships in subtopic 815-20: Interest contracts: Amount reclassified from AOCI into income — — (88) — — — (145) — As of September 30, 2021, the following amounts were recorded on the balance sheet related to cumulative basis adjustment for fair value hedges: Line Item in the Balance Sheet in Which the Hedged Item is Included Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset (in thousands) Loans $ 26,177 $ 1,165 Derivatives Not Designated as Hedging Instruments Interest Rate Swaps - The Company periodically enters into commercial loan interest rate swap agreements in order to provide commercial loan customers with the ability to convert from variable to fixed interest rates. These derivative contracts relate to transactions in which the Company enters into an interest rate swap with a customer, while simultaneously entering into an offsetting interest rate swap with an institutional counterparty. Credit Risk Participation Agreements - The Company enters into RPAs to manage the credit exposure on interest rate contracts associated with a syndicated loan. The Company may enter into protection purchased RPAs with institutional counterparties to decrease or increase its exposure to a borrower. Under the RPA, the Company will receive or make payment if a borrower defaults on the related interest rate contract. The notional amount of the RPAs reflects the Company’s pro-rata share of the derivative instrument. Interest Rate Forward Loan Sales Contracts & Interest Rate Lock Commitments - The Company enters into forward delivery contracts to sell residential mortgage loans at specific prices and dates in order to hedge the interest rate risk in its portfolio of mortgage loans held for sale and its residential mortgage interest rate lock commitments. At September 30, 2021, the Bank had commitments to originate mortgage loans held for sale totaling $23.8 million and forward sales commitments of $24.2 million, which are used to hedge both on-balance sheet and off-balance sheet exposures. At December 31, 2020, the Bank had $13.0 million of commitments to originate mortgage loans held for sale and no forward sales commitments. The following table presents the net gains (losses) recognized on the consolidated statements of income related to the derivatives not designated as hedging instruments for the periods indicated: Location in the Consolidated Statements of Income For the Three Months Ended September 30, For the Nine Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps Other income $ 5 $ (90) $ 40 $ 33 RPAs Other income 1 (3) 2 94 Interest rate lock commitments Loan revenue 316 — 316 — Interest rate forward loan sales contracts Loan revenue (107) — (107) — Total $ 215 $ (93) $ 251 $ 127 Offsetting of Derivatives The Company has entered into agreements with certain counterparty financial institutions, which include master netting agreements. However, the Company has elected to account for all derivatives with counterparty institutions on a gross basis. The Company manages the risk of default by its borrower counterparties through its normal loan underwriting and credit monitoring policies and procedures. The table below presents gross derivatives and the respective collateral received or pledged in the form of other financial instruments as of September 30, 2021 and December 31, 2020, which are generally marketable securities and/or cash. The collateral amounts in the table below are limited to the outstanding balances of the related asset or liability (after netting is applied); thus instances of over-collateralization are not shown. Further, the net amounts of derivative assets or liabilities can be reconciled to the tabular disclosure of fair value. The tabular disclosure of fair value provides the location that derivative assets and liabilities are presented on the consolidated balance sheets. Gross Amounts Not Offset in the Balance Sheet (in thousands) Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Balance Sheet Net Amounts of Assets (Liabilities) presented in the Balance Sheet Financial Instruments Cash Collateral Received (Paid) Net Assets (Liabilities) As of September 30, 2021 Asset Derivatives $ 6,711 $ — $ 6,711 $ — $ — $ 6,711 Liability Derivatives (7,674) — (7,674) — (4,630) (3,044) As of December 31, 2020 Asset Derivatives $ 10,796 $ — $ 10,796 $ — $ — $ 10,796 Liability Derivatives (13,267) — (13,267) — (13,267) — Credit-risk-related Contingent Features The Company has an unsecured federal funds line with its institutional derivative counterparty. The Company has an agreement with its institutional derivative counterparty that contains a provision under which if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has an agreement with its derivative counterparty that contains a provision under which the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company’s default on the indebtedness. As of September 30, 2021, the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $6.3 million. As of September 30, 2021, the Company had minimum collateral posting thresholds with certain of its derivative counterparties and had posted $4.6 million of collateral related to these agreements. If the Company had breached any of these provisions at September 30, 2021, it could have been required to settle its obligations under the agreements at their termination value of $6.3 million.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible AssetsThe carrying amount of goodwill was $62.5 million at September 30, 2021 and December 31, 2020. The following table presents the gross carrying amount, accumulated amortization, and net carrying amount of other intangible assets at the dates indicated: As of September 30, 2021 As of December 31, 2020 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangible $ 41,745 $ (29,649) $ 12,096 $ 41,745 $ (26,440) $ 15,305 Customer relationship intangible 5,265 (3,451) 1,814 5,265 (2,630) 2,635 Other 2,700 (2,520) 180 2,700 (2,438) 262 $ 49,710 $ (35,620) $ 14,090 $ 49,710 $ (31,508) $ 18,202 Indefinite-lived trade name intangible $ 7,040 $ 7,040 The following table provides the estimated future amortization expense for the remaining three months ending December 31, 2021 and the succeeding annual periods: (in thousands) Core Deposit Intangible Customer Relationship Intangible Other Total 2021 $ 981 $ 241 $ 24 $ 1,246 2022 3,487 797 79 4,363 2023 2,833 518 51 3,402 2024 2,180 239 24 2,443 2025 1,526 19 2 1,547 Thereafter 1,089 — — 1,089 Total $ 12,096 $ 1,814 $ 180 $ 14,090

Other Assets

Other Assets	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Other Assets	Other Assets The components of the Company's other assets as of September 30, 2021 and December 31, 2020 were as follows: (in thousands) September 30, 2021 December 31, 2020 Bank-owned life insurance $ 84,822 $ 83,483 Interest receivable 19,076 21,706 FHLB stock 10,319 13,784 Mortgage servicing rights 5,634 5,137 Operating lease right-of-use assets, net 3,093 3,613 Federal and state income taxes, current 1,433 — Federal and state income taxes, deferred 9,298 3,845 Derivative assets 6,711 10,796 Other receivables/assets 12,007 11,129 $ 152,393 $ 153,493

Deposits

Deposits	9 Months Ended
	Sep. 30, 2021
Deposits [Abstract]
Deposits	Deposits The following table presents the composition of our deposits as of the dates indicated: (in thousands) September 30, 2021 December 31, 2020 Noninterest bearing deposits $ 999,887 $ 910,655 Interest checking deposits 1,464,389 1,351,641 Money market deposits 989,095 918,654 Savings deposits 616,924 529,751 Time deposits under $250 522,907 581,471 Time deposits of $250 or more 364,579 254,877 Total deposits $ 4,957,781 $ 4,547,049 The Company had $5.6 million and $7.8 million in reciprocal time deposits through the CDARS program as of September 30, 2021 and December 31, 2020, respectively. Included in interest-bearing checking and money market deposits at September 30, 2021 and December 31, 2020 were $52.6 million and $14.8 million, respectively, of reciprocal deposits in the ICS program. The CDARS and ICS programs coordinate, on a reciprocal basis, a network of banks to spread deposits exceeding the FDIC insurance coverage limits out to numerous institutions in order to provide insurance coverage for all participating deposits. As of September 30, 2021 and December 31, 2020, the Company had public entity deposits that were collateralized by investment securities of $265.9 million and $156.7 million, respectively.

Short-Term Borrowings

Short-Term Borrowings	9 Months Ended
	Sep. 30, 2021
Short-term Debt [Abstract]
Short-Term Borrowings	Short-Term Borrowings The following table summarizes our short-term borrowings as of the dates indicated: September 30, 2021 December 31, 2020 (in thousands) Weighted Average Rate Balance Weighted Average Rate Balance Securities sold under agreements to repurchase 0.25 % $ 187,508 0.28 % $ 174,289 Federal Home Loan Bank advances — — 0.29 56,500 Total 0.25 % $ 187,508 0.28 % $ 230,789 Securities Sold Under an Agreement to Repurchase - Securities sold under agreements to repurchase are agreements in which the Company acquires funds by selling assets to another party under a simultaneous agreement to repurchase the same assets at a specified price and date. The Company enters into repurchase agreements and also offers a demand deposit account product to customers that sweeps their balances in excess of an agreed upon target amount into overnight repurchase agreements. All securities sold under agreements to repurchase are recorded on the face of the balance sheet. Federal Home Loan Bank Advances - The Bank has a secured line of credit with the FHLBDM. Advances from the FHLBDM are collateralized primarily by one- to four-family residential, commercial and agricultural real estate first mortgages equal to various percentages of the total outstanding notes. See Note 3. Loans Receivable and the Allowance for Credit Losses of the notes to the consolidated financial statements. Federal Funds Purchased - The Bank has unsecured federal funds lines totaling $170.0 million from multiple correspondent banking relationships. There were no borrowings from such lines at either September 30, 2021 or December 31, 2020. Other - At September 30, 2021 and December 31, 2020, the Company had no Federal Reserve Discount Window borrowings, while the financing capacity was $62.7 million as of September 30, 2021 and $67.7 million as of December 31, 2020. As of September 30, 2021 and December 31, 2020, the Bank had municipal securities with a market value of $67.8 million and $72.0 million, respectively, pledged to the Federal Reserve Bank of Chicago to secure potential borrowings.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Junior Subordinated Notes Issued to Capital Trusts The table below summarizes the terms of each issuance of junior subordinated notes outstanding as of the dates indicated: (in thousands) Face Value Book Value Interest Rate Rate Maturity Date Callable Date September 30, 2021 ATBancorp Statutory Trust I $ 7,732 $ 6,879 Three-month LIBOR + 1.68% 1.80 % 06/15/2036 06/15/2011 ATBancorp Statutory Trust II 12,372 10,893 Three-month LIBOR + 1.65% 1.77 % 09/15/2037 06/15/2012 Barron Investment Capital Trust I 2,062 1,792 Three-month LIBOR + 2.15% 2.28 % 09/23/2036 09/23/2011 Central Bancshares Capital Trust II 7,217 6,868 Three-month LIBOR + 3.50% 3.62 % 03/15/2038 03/15/2013 MidWestOne Statutory Trust II 15,464 15,464 Three-month LIBOR + 1.59% 1.71 % 12/15/2037 12/15/2012 Total $ 44,847 $ 41,896 December 31, 2020 ATBancorp Statutory Trust I $ 7,732 $ 6,850 Three-month LIBOR + 1.68% 1.90 % 06/15/2036 06/15/2011 ATBancorp Statutory Trust II 12,372 10,850 Three-month LIBOR + 1.65% 1.87 % 09/15/2037 06/15/2012 Barron Investment Capital Trust I 2,062 1,767 Three-month LIBOR + 2.15% 2.39 % 09/23/2036 09/23/2011 Central Bancshares Capital Trust II 7,217 6,832 Three-month LIBOR + 3.50% 3.72 % 03/15/2038 03/15/2013 MidWestOne Statutory Trust II 15,464 15,464 Three-month LIBOR + 1.59% 1.81 % 12/15/2037 12/15/2012 Total $ 44,847 $ 41,763 The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated notes at the stated maturity date or upon redemption of the junior subordinated notes. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated notes. The Company’s obligation under the junior subordinated notes and other relevant trust agreements, in aggregate, constitutes a full and unconditional guarantee by the Company of each trust’s obligations under the trust preferred securities issued by each trust. The Company has the right to defer payment of interest on the junior subordinated notes and, therefore, distributions on the trust preferred securities, for up to five years, but not beyond the stated maturity date in the table above. During any such deferral period the Company may not pay cash dividends on its stock and generally may not repurchase its stock. Subordinated Debentures On May 1, 2019, with the acquisition of ATBancorp, the Company assumed $10.9 million of subordinated debentures (the "ATB Debentures"). The ATB Debentures had a stated maturity of May 31, 2023, and bore interest at a fixed annual rate of 6.50%, with interest payable semi-annually. The Company redeemed the debentures, in whole, on May 31, 2021. At the time of redemption, we were permitted to treat 20% of the ATB Debentures as Tier 2 capital under the applicable rules and regulations of the Federal Reserve. The amount of ATB Debentures qualifying as Tier 2 regulatory capital would have been phased-out completely starting in the second quarter of 2022. On July 28, 2020, the Company completed the private placement offering of $65.0 million of its subordinated notes, of which $63.75 million have been exchanged for subordinated notes registered under the Securities Act of 1933. The 5.75% fixed-to-floating rate subordinated notes are due July 30, 2030. At September 30, 2021, 100% of the subordinated notes qualified as Tier 2 capital. Per applicable Federal Reserve rules and regulations, the amount of the subordinated notes qualifying as Tier 2 regulatory capital will be phased-out by 20% of the amount of the subordinated notes in each of the five years beginning on the fifth anniversary preceding the maturity date of the subordinated notes. Other Long-Term Debt Long-term borrowings were as follows as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (in thousands) Weighted Average Rate Balance Weighted Average Rate Balance Finance lease payable 8.89 % $ 989 8.89 % $ 1,096 FHLB borrowings 2.76 48,132 1.92 91,198 Total 2.88 % $ 49,121 2.00 % $ 92,294 As a member of the FHLBDM, the Bank may borrow funds from the FHLB in amounts up to 45% of the Bank’s total assets, provided the Bank is able to pledge an adequate amount of qualified assets to secure the borrowings. Advances from the FHLB are collateralized primarily by one- to four-family residential, commercial and agricultural real estate first mortgages equal to various percentages of the total outstanding notes. See Note 3. Loans Receivable and the Allowance for Credit Losses of the notes to the consolidated financial statements. At September 30, 2021, FHLB long-term borrowings included advances from the FHLBC, which were collateralized by investment securities. See Note 2. Debt Securities of the notes to the consolidated financial statements. As of September 30, 2021, FHLB borrowings were as follows: (in thousands) Weighted Average Rate Amount Due in 2021 — % $ — Due in 2022 2.68 % 31,000 Due in 2023 2.79 % 11,000 Due in 2024 3.15 % 6,000 Total 48,000 Valuation adjustment from acquisition accounting 132 Total $ 48,132

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share The following table presents the computation of basic and diluted earnings per common share for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands, except per share amounts) 2021 2020 2021 2020 Basic Earnings (Loss) Per Share: Net income (loss) $ 16,311 $ (19,824) $ 55,230 $ (10,087) Weighted average shares outstanding 15,840,769 16,099,324 15,938,889 16,111,591 Basic earnings (loss) per common share $ 1.03 $ (1.23) $ 3.47 $ (0.63) Diluted Earnings (Loss) Per Share: Net income (loss) $ 16,311 $ (19,824) $ 55,230 $ (10,087) Weighted average shares outstanding, including all dilutive potential shares 15,863,247 16,099,324 15,963,229 16,111,591 Diluted earnings (loss) per common share $ 1.03 $ (1.23) $ 3.46 $ (0.63) The weighted average shares that have an antidilutive effect in the calculation of diluted earnings per common share and have been excluded from the computation above were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Dilutive shares (1) — 7,132 — 6,820 (1) Dilutive potential shares that were excluded from the computation of diluted earnings per common share for the three and nine months ended September 30, 2020 as a result of the reported net loss available to common shareholders.

Regulatory Capital Requirements

Regulatory Capital Requirements and Restrictions on Subsidiary Cash	9 Months Ended
	Sep. 30, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Capital Requirements and Restrictions on Subsidiary Cash	Regulatory Capital Requirements and Restrictions on Subsidiary Cash Regulatory Capital and Reserve Requirement - The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's consolidated financial statements. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. As of September 30, 2021 and December 31, 2020, the Bank was not required to maintain reserve balances in cash on hand or on deposit with Federal Reserve Banks, and therefore the total amount held in reserve for each of these periods was zero dollars. A comparison of the Company's and the Bank's capital with the corresponding minimum regulatory requirements in effect as of September 30, 2021 and December 31, 2020, is presented below: Actual For Capital Adequacy Purposes With Capital Conservation Buffer (1) To Be Well Capitalized Under Prompt Corrective Action Provisions (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio At September 30, 2021 Consolidated: Total capital/risk weighted assets $603,666 13.58% $466,739 10.50% N/A N/A Tier 1 capital/risk weighted assets 497,955 11.20 377,837 8.50 N/A N/A Common equity tier 1 capital/risk weighted assets 456,059 10.26 311,160 7.00 N/A N/A Tier 1 leverage capital/average assets 497,955 8.70 229,025 4.00 N/A N/A MidWest One Bank: Total capital/risk weighted assets $579,124 13.05% $465,857 10.50% $443,674 10.00% Tier 1 capital/risk weighted assets 538,413 12.14 377,123 8.50 354,939 8.00 Common equity tier 1 capital/risk weighted assets 538,413 12.14 310,572 7.00 288,388 6.50 Tier 1 leverage capital/average assets 538,413 9.41 228,764 4.00 285,955 5.00 At December 31, 2020 Consolidated: Total capital/risk weighted assets $572,437 13.41% $448,068 10.50% N/A N/A Tier 1 capital/risk weighted assets 456,526 10.70 362,722 8.50 N/A N/A Common equity tier 1 capital/risk weighted assets 414,763 9.72 298,712 7.00 N/A N/A Tier 1 leverage capital/average assets 456,526 8.50 214,795 4.00 N/A N/A MidWest One Bank: Total capital/risk weighted assets $547,558 12.89% $446,113 10.50% $424,870 10.00% Tier 1 capital/risk weighted assets 500,981 11.79 361,139 8.50 339,896 8.00 Common equity tier 1 capital/risk weighted assets 500,981 11.79 297,409 7.00 276,165 6.50 Tier 1 leverage capital/average assets 500,981 9.35 214,251 4.00 271,992 5.00 (1) Includes a capital conservation buffer of 2.50%. Subordinated Notes - The Company completed a private placement of $65.0 million aggregate principal amount of 5.75% fixed-to-floating rate subordinated notes on July 28, 2020. The subordinated notes are intended to qualify as Tier 2 capital for regulatory purposes, and the Company is using the net proceeds from the offering for general corporate purposes and to support its organic growth plans, including maintaining its regulatory capital ratios. ATBancorp Subordinated Debenture Redemption: On May 31, 2021, the Company redeemed, in whole, $10.8 million of ATB Debentures. The amount of ATB Debentures qualifying as Tier 2 regulatory capital would have been phased-out completely starting in the second quarter of 2022. See Note 9. Long-Term Debt

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Credit-related financial instruments - The Bank is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, commitments to sell loans, and standby letters of credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the balance sheets. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. The following table summarizes the Bank's commitments as of the dates indicated: September 30, 2021 December 31, 2020 (in thousands) Commitments to extend credit $ 950,157 $ 897,274 Commitments to sell loans 58,679 59,956 Standby letters of credit 19,551 34,212 Total $ 1,028,387 $ 991,442 The Bank’s exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for commitments to extend credit is represented by the contractual amount of those instruments. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. 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 Bank evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management’s credit evaluation of the party. Collateral held varies, but may include accounts receivable, crops, livestock, inventory, property and equipment, residential real estate and income-producing commercial properties. Commitments to sell loans are agreements to sell loans held for sale to third parties at an agreed upon price. Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements and, generally, have terms of one year or less. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Bank holds collateral, which may include accounts receivable, inventory, property, equipment and income-producing properties, that support those commitments, if deemed necessary. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Bank would be required to fund the commitment. The maximum potential amount of future payments the Bank could be required to make is represented by the contractual amount shown in the summary above. If the commitment is funded, the Bank would be entitled to seek recovery from the customer. Liability for Off-Balance Sheet Credit Losses - The Company records a liability for off-balance sheet credit losses through a charge to credit loss expense (or a reversal of credit loss expense) on the Company's consolidated statements of income and other liabilities on the Company's consolidated balance sheets. At September 30, 2021, the liability for off-balance-sheet credit losses totaled $3.9 million, whereas the total amount of the liability as of December 31, 2020 was $4.1 million. The total amount recorded in credit loss (benefit) expense for the nine months ended September 30, 2021 was a benefit of $0.2 million, while credit loss expense of $1.1 million was recorded for the nine months ended September 30, 2020. Litigation - In the normal course of business, the Company and its subsidiaries have been named, from time to time, as defendants in various legal actions. Certain of the actual or threatened legal actions may include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages. Management, after consulting with legal counsel, is of the opinion that the ultimate liability, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company. Concentrations of credit risk - Substantially all of the Bank’s loans, commitments to extend credit and standby letters of credit have been granted to customers in the Bank’s market areas. Although the loan portfolio of the Bank is diversified, approximately 62% of the loans are real estate loans, excluding farmland, and approximately 7% are agriculturally related. The concentrations of credit by type of loan are set forth in Note 3. Loans Receivable and the Allowance for Credit Losses

Fair Value of Financial Instrum

Fair Value of Financial Instruments and Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments and Fair Value Measurements	Fair Value of Financial Instruments and Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (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. There are three levels of inputs that may be used to measure fair values: • Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. • Level 2 – Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. • Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. For additional information regarding the valuation methodologies used to measure the Company's assets recorded at fair value, and for estimating fair value for financial instruments not recorded at fair value, see Note 1. Nature of Business and Significant Accounting Policies and Note 20. Estimated Fair Value of Financial Instruments and Fair Value Measurements to the consolidated financial statements in the Company's 2020 Annual Report on Form 10-K, filed with the SEC on March 11, 2021. The Company uses fair value to measure certain assets and liabilities on a recurring basis, primarily available for sale debt securities, derivatives and mortgage servicing rights. For assets measured at the lower of cost or fair value, the fair value measurement criteria may or may not be met during a reporting period, and such measurements are therefore considered "nonrecurring" for purposes of disclosing the Company's fair value measurements. Fair value is used on a nonrecurring basis to adjust carrying values for collateral dependent individually analyzed loans and other real estate owned. Recurring Basis The following table summarizes assets and liabilities measured at fair value on a recurring basis as of the dates indicated, by level within the fair value hierarchy: Fair Value Measurement at September 30, 2021 Using (in thousands) Total Level 1 Level 2 Level 3 Assets: Available for sale debt securities: U.S. Government agencies and corporations $ 288 $ — $ 288 $ — State and political subdivisions 701,281 — 701,281 — Mortgage-backed securities 109,231 — 109,231 — Collateralized mortgage obligations 853,833 — 853,833 — Corporate debt securities 472,269 — 472,269 — Derivative assets 6,711 — 6,395 316 Mortgage servicing rights 5,634 — 5,634 — Liabilities: Derivative liabilities $ 7,674 $ — $ 7,674 $ — Fair Value Measurement at December 31, 2020 Using (in thousands) Total Level 1 Level 2 Level 3 Assets: Debt securities available for sale: U.S. Government agencies and corporations $ 361 $ — $ 361 $ — State and political subdivisions 628,346 — 628,346 — Mortgage-backed securities 94,018 — 94,018 — Collateralized mortgage obligations 565,836 — 565,836 — Corporate debt securities 368,820 — 368,820 — Derivative assets 10,796 — 10,796 — Mortgage servicing rights 5,137 — 5,137 — Liabilities: Derivative liabilities $ 13,267 $ — $ 13,267 $ — There were no transfers of assets between Level 3 and other levels of the fair value hierarchy during the three and nine months ended September 30, 2021 or the year ended December 31, 2020. Changes in the fair value of available for sale debt securities are included in other comprehensive income. The fair values of the interest rate lock commitments and interest rate forward loan sales contracts are estimated using quoted or published market prices for similar instruments, adjusted for factors such as pull-through rate assumptions based on historical information, where appropriate. The pull-through rate assumptions are considered Level 3 valuation inputs and are significant to the interest rate lock commitment valuation; as such, the interest rate lock commitment derivatives are classified as Level 3. The following table presents the valuation technique, significant unobservable inputs, and quantitative information about the unobservable inputs used for fair value measurements of the financial instruments held by the Company and categorized within Level 3 of the fair value hierarchy as of the dates indicated: Fair Value at (dollars in thousands) September 30, 2021 December 31, 2020 Valuation Techniques(s) Unobservable Input Range of Inputs Weighted Average Interest rate lock commitments $ 316 $ — Quoted or published market prices of similar instruments, adjusted for factors such as pull-through rate assumptions Pull-through rate 88 % - 100 % 88 % Nonrecurring Basis The following table presents assets measured at fair value on a nonrecurring basis as of the dates indicated: Fair Value Measurement at September 30, 2021 Using (in thousands) Total Level 1 Level 2 Level 3 Collateral dependent individually analyzed loans $ 16,340 $ — $ — $ 16,340 Foreclosed assets, net 454 — — 454 Fair Value Measurement at December 31, 2020 Using (in thousands) Total Level 1 Level 2 Level 3 Collateral dependent individually analyzed loans $ 34,265 $ — $ — $ 34,265 Foreclosed assets, net 2,316 — — 2,316 The following table presents the valuation technique(s), unobservable inputs, and quantitative information about the unobservable inputs used for fair value measurements of the financial instruments held by the Company and categorized within Level 3 of the fair value hierarchy as of the dates indicated: Fair Value at (dollars in thousands) September 30, 2021 December 31, 2020 Valuation Techniques(s) Unobservable Input Range of Inputs Weighted Average Collateral dependent individually analyzed loans $ 16,340 $ 34,265 Fair value of collateral Valuation adjustments 7 % - 55 % 25 % Foreclosed assets, net $ 454 $ 2,316 Fair value of collateral Valuation adjustments 8 % - 66 % 24 % Changes in assumptions or estimation methodologies may have a material effect on these estimated fair values. Carrying Amount and Estimated Fair Value of Financial Instruments The carrying amount and estimated fair value of financial instruments at September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 138,514 $ 138,514 $ 138,514 $ — $ — Debt securities available for sale 2,136,902 2,136,902 — 2,136,902 — Loans held for sale 58,679 58,786 — 58,786 — Loans held for investment, net 3,220,744 3,238,812 — — 3,238,812 Interest receivable 19,076 19,076 — 19,076 — FHLB stock 10,319 10,319 — 10,319 — Derivative assets 6,711 6,711 — 6,395 316 Financial liabilities: Noninterest bearing deposits 999,887 999,887 999,887 — — Interest bearing deposits 3,957,894 3,956,787 3,070,408 886,379 — Short-term borrowings 187,508 187,508 187,508 — — Finance leases payable 989 989 — 989 — FHLB borrowings 48,132 49,369 — 49,369 — Junior subordinated notes issued to capital trusts 41,896 35,382 — 35,382 — Subordinated debentures 63,843 68,411 — 68,411 — Derivative liabilities 7,674 7,674 — 7,674 — December 31, 2020 (in thousands) Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 82,659 $ 82,659 $ 82,659 $ — $ — Debt securities available for sale 1,657,381 1,657,381 — 1,657,381 — Loans held for sale 59,956 60,039 — 60,039 — Loans held for investment, net 3,426,723 3,469,515 — — 3,469,515 Interest receivable 21,706 21,706 — 21,706 — FHLB stock 13,784 13,784 — 13,784 — Derivative assets 10,796 10,796 — 10,796 — Financial liabilities: Noninterest bearing deposits 910,655 910,655 910,655 — — Interest bearing deposits 3,636,394 3,640,365 2,800,046 840,319 Short-term borrowings 230,789 230,789 230,789 — — Finance leases payable 1,096 1,096 — 1,096 — FHLB borrowings 91,198 93,380 — 93,380 Junior subordinated notes issued to capital trusts 41,763 33,986 — 33,986 Subordinated debentures 74,634 77,228 — 77,228 Derivative liabilities 13,267 13,267 — 13,267 —

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	LeasesSubstantially all of the leases in which the Company is the lessee are comprised of real estate property for banking offices and office space with terms extending through 2025. We do not have any subleased properties. Substantially all of our leases are classified as operating leases, with the Company only holding one existing finance lease for a banking office location with a lease term through 2025. Supplemental balance sheet information related to leases was as follows: (in thousands) Classification September 30, 2021 December 31, 2020 Lease Right-of-Use Assets Operating lease right-of-use assets Other assets $ 3,093 $ 3,613 Finance lease right-of-use asset Premises and equipment, net 470 542 Total right-of-use assets $ 3,563 $ 4,155 Lease Liabilities Operating lease liability Other liabilities $ 4,038 $ 4,583 Finance lease liability Long-term debt 989 1,096 Total lease liabilities $ 5,027 $ 5,679 Weighted-average remaining lease term Operating leases 8.95 years 8.82 years Finance lease 4.92 years 5.67 years Weighted-average discount rate Operating leases 4.05 % 3.92 % Finance lease 8.89 % 8.89 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2021 2020 2021 2020 Lease Costs Operating lease cost $ 301 $ 209 $ 894 $ 937 Variable lease cost (3) 42 89 189 Interest on lease liabilities (1) 23 25 69 78 Amortization of right-of-use assets 24 24 72 72 Net lease cost $ 345 $ 300 $ 1,124 $ 1,276 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 553 $ 443 $ 1,655 $ 1,598 Operating cash flows from finance lease 23 25 69 78 Finance cash flows from finance lease 37 32 107 94 Supplemental non-cash information on lease liabilities: Right-of-use assets obtained in exchange for new operating lease liabilities 232 39 232 132 (1) Included in long-term debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in occupancy expense of premises, net. Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more for the remaining three months ending December 31, 2021 and the succeeding annual periods were as follows: (in thousands) Finance Leases Operating Leases December 31, 2021 $ 59 $ 295 December 31, 2022 240 1,060 December 31, 2023 245 947 December 31, 2024 250 717 December 31, 2025 255 247 Thereafter 171 1,973 Total undiscounted lease payment $ 1,220 $ 5,239 Amounts representing interest (231) (1,201) Lease liability $ 989 $ 4,038
Leases	LeasesSubstantially all of the leases in which the Company is the lessee are comprised of real estate property for banking offices and office space with terms extending through 2025. We do not have any subleased properties. Substantially all of our leases are classified as operating leases, with the Company only holding one existing finance lease for a banking office location with a lease term through 2025. Supplemental balance sheet information related to leases was as follows: (in thousands) Classification September 30, 2021 December 31, 2020 Lease Right-of-Use Assets Operating lease right-of-use assets Other assets $ 3,093 $ 3,613 Finance lease right-of-use asset Premises and equipment, net 470 542 Total right-of-use assets $ 3,563 $ 4,155 Lease Liabilities Operating lease liability Other liabilities $ 4,038 $ 4,583 Finance lease liability Long-term debt 989 1,096 Total lease liabilities $ 5,027 $ 5,679 Weighted-average remaining lease term Operating leases 8.95 years 8.82 years Finance lease 4.92 years 5.67 years Weighted-average discount rate Operating leases 4.05 % 3.92 % Finance lease 8.89 % 8.89 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2021 2020 2021 2020 Lease Costs Operating lease cost $ 301 $ 209 $ 894 $ 937 Variable lease cost (3) 42 89 189 Interest on lease liabilities (1) 23 25 69 78 Amortization of right-of-use assets 24 24 72 72 Net lease cost $ 345 $ 300 $ 1,124 $ 1,276 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 553 $ 443 $ 1,655 $ 1,598 Operating cash flows from finance lease 23 25 69 78 Finance cash flows from finance lease 37 32 107 94 Supplemental non-cash information on lease liabilities: Right-of-use assets obtained in exchange for new operating lease liabilities 232 39 232 132 (1) Included in long-term debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in occupancy expense of premises, net. Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more for the remaining three months ending December 31, 2021 and the succeeding annual periods were as follows: (in thousands) Finance Leases Operating Leases December 31, 2021 $ 59 $ 295 December 31, 2022 240 1,060 December 31, 2023 245 947 December 31, 2024 250 717 December 31, 2025 255 247 Thereafter 171 1,973 Total undiscounted lease payment $ 1,220 $ 5,239 Amounts representing interest (231) (1,201) Lease liability $ 989 $ 4,038

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company has evaluated events that have occurred subsequent to September 30, 2021 and has concluded there are no other subsequent events that would require recognition in the accompanying consolidated financial statements. On October 19, 2021, the board of directors of the Company declared a cash dividend of $0.2250 per share payable on December 15, 2021 to shareholders of record as of the close of business on December 1, 2021. On October 22, 2021, the Company entered into an amended credit agreement with a correspondent bank, effective September 30, 2021, that provides a revolving commitment of up to $25.0 million. Interest is payable on the $25.0 million revolving commitment at an annual rate equal to the monthly reset term SOFR rate plus 1.70%, with a maturity date of September 30, 2022. The Company had no balance outstanding under the terms of the credit agreement as of September 30, 2021. On November 1, 2021, the Company and Iowa First Bancshares Corp. (IOFB), the holding company for First National Bank in Fairfield (FNBF) and First National Bank of Muscatine (FNBM), jointly announced the signing of a definitive merger agreement pursuant to which the Company will acquire IOFB, FNBM, and FNBF. Under terms of the definitive merger agreement, the aggregate consideration to be paid by MidWest One for IOFB will consist of cash consideration of $47.6 million, subject to adjustment. The acquisition is expected to close during the first quarter of 2022 and is subject to approval by IOFB’s shareholders and regulatory agencies, as well as other customary closing conditions. Pursuant to the Company’s share repurchase program approved on June 22, 2021, the Company has purchased 37,700 shares of common stock subsequent to September 30, 2021 and through November 2, 2021 for a total cost of $1.2 million inclusive of transaction costs, leaving $6.4 million remaining available under the program.

Nature of Business and Signif_2

Nature of Business and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying interim condensed consolidated financial statements are prepared in accordance with GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934. Accordingly, certain disclosures accompanying annual consolidated financial statements are omitted. In the opinion of management, all significant intercompany accounts and transactions have been eliminated and adjustments, consisting solely of normal recurring accruals and considered necessary for the fair presentation of financial statements for the interim periods, have been included. The current period's results of operations are not necessarily indicative of the results that ultimately may be achieved for the year. The interim condensed consolidated financial statements and notes thereto should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 10-K for the year ended December 31, 2020, filed with the SEC on March 11, 2021.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect: (1) the reported amounts of assets and liabilities, (2) the disclosure of contingent assets and liabilities at the date of the financial statements, and (3) the reported amounts of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. The results for the nine months ended September 30, 2021 may not be indicative of results for the year ending December 31, 2021, or for any other period.
Segment Reporting	Segment Reporting The Company’s activities are considered to be one reportable segment. The Company is engaged in the business of commercial and retail banking, and trust and investment services, with operations throughout Iowa, the Minneapolis/St. Paul metropolitan area of Minnesota, western Wisconsin, Naples and Fort Myers, Florida, and Denver, Colorado. Substantially all income is derived from a diverse base of commercial, mortgage and retail lending activities, and investments.
Effect of New Financial Accounting Standards	Effect of New Financial Accounting Standards Accounting Guidance Pending Adoption at September 30, 2021 On March 12, 2020, the FASB issued ASU 2020-04, Reference Rate Reform (ASC 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting
Derivatives	Derivatives Designated as Hedging Instruments The Company uses derivative instruments to hedge its exposure to economic risks, including interest rate, liquidity, and credit risk. Certain hedging relationships are formally designated and qualify for hedge accounting under GAAP as fair value or cash flow hedges. Fair Value Hedges - Derivatives are designated as fair value hedges to limit the Company's exposure to changes in the fair value of assets or liabilities due to movements in interest rates. The Company entered into pay-fixed receive-floating interest rate swaps to manage its exposure to changes in fair value in certain fixed-rate assets. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest income. Cash Flow Hedges - Derivatives are designated as cash flow hedges in order to minimize the variability in cash flows of earning assets or forecasted transactions caused by movement in interest rates. In February 2020, the Company entered into a pay-fixed receive-variable interest rate swap with a notional amount of $30.0 million to hedge against adverse fluctuations in interest rates by reducing exposure to variability in cash flows relating to interest payments on the Company's variable rate debt. The interest rate swap was designated as a cash flow hedge. The gain or loss on the derivative was recorded in accumulated other comprehensive income and subsequently reclassified into interest expense in the same period(s) during which the hedged transaction affects earnings. The Company terminated its cash flow hedge in the fourth quarter of 2020.
Fair Value Measurements	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (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. There are three levels of inputs that may be used to measure fair values: • Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. • Level 2 – Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. • Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. For additional information regarding the valuation methodologies used to measure the Company's assets recorded at fair value, and for estimating fair value for financial instruments not recorded at fair value, see Note 1. Nature of Business and Significant Accounting Policies and Note 20. Estimated Fair Value of Financial Instruments and Fair Value Measurements to the consolidated financial statements in the Company's 2020 Annual Report on Form 10-K, filed with the SEC on March 11, 2021. The Company uses fair value to measure certain assets and liabilities on a recurring basis, primarily available for sale debt securities, derivatives and mortgage servicing rights. For assets measured at the lower of cost or fair value, the fair value measurement criteria may or may not be met during a reporting period, and such measurements are therefore considered

Debt Securities (Tables)

Debt Securities (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Securities [Abstract]
Schedule of Debt Securities, Available-for-sale	The amortized cost and fair value of investment debt securities AFS, with gross unrealized gains and losses, were as follows: As of September 30, 2021 (in thousands) Amortized Gross Gross Allowance for Credit Loss related to Debt Securities Fair Value U.S. Government agencies and corporations $ 286 $ 2 $ — $ — $ 288 State and political subdivisions 696,306 9,671 4,696 — 701,281 Mortgage-backed securities 108,445 1,280 494 — 109,231 Collateralized mortgage obligations 860,623 2,564 9,354 — 853,833 Corporate debt securities 466,570 8,380 2,681 — 472,269 Total debt securities $ 2,132,230 $ 21,897 $ 17,225 $ — $ 2,136,902 As of December 31, 2020 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Allowance for Credit Loss related to Debt Securities Fair Value U.S. Government agencies and corporations $ 355 $ 6 $ — $ — $ 361 State and political subdivisions 611,666 17,163 483 — 628,346 Mortgage-backed securities 92,261 1,758 1 — 94,018 Collateralized mortgage obligations 559,718 6,332 214 — 565,836 Corporate debt securities 360,103 9,333 616 — 368,820 Total debt securities $ 1,624,103 $ 34,592 $ 1,314 $ — $ 1,657,381
Schedule of Temporary Impairment Losses	The following table presents debt securities AFS in an unrealized loss position for which an allowance for credit losses has not been recorded at September 30, 2021, aggregated by investment category and length of time in a continuous loss position: As of September 30, 2021 Number of Securities Less than 12 Months 12 Months or More Total Available for Sale Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands, except number of securities) State and political subdivisions 127 $ 254,630 $ 4,447 $ 12,474 $ 249 $ 267,104 $ 4,696 Mortgage-backed securities 7 45,955 494 44 — 45,999 494 Collateralized mortgage obligations 35 607,333 8,913 25,716 441 633,049 9,354 Corporate debt securities 25 126,945 1,866 18,094 815 145,039 2,681 Total 194 $ 1,034,863 $ 15,720 $ 56,328 $ 1,505 $ 1,091,191 $ 17,225 The following table presents debt securities AFS in an unrealized loss position for which an allowance for credit losses has not been recorded at December 31, 2020, aggregated by investment category and length of time in a continuous loss position: As of December 31, 2020 Available for Sale Number of Securities Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands, except number of securities) State and political subdivisions 27 $ 31,489 $ 157 $ 4,065 $ 326 $ 35,554 $ 483 Mortgage-backed securities 7 315 1 — — 315 1 Collateralized mortgage obligations 8 133,032 214 — — 133,032 214 Corporate debt securities 15 35,995 523 3,311 93 39,306 616 Total 57 $ 200,831 $ 895 $ 7,376 $ 419 $ 208,207 $ 1,314
Schedule of Proceeds and Realized Gains (Losses)	Proceeds and gross realized gains and losses on debt securities available for sale for the three and nine months ended September 30, 2021 and 2020 were as follows: Three Months Ended Nine Months Ended (in thousands) September 30, 2021 September 30, 2020 September 30, 2021 September 30, 2020 Proceeds from sales of debt securities available for sale $ 782 $ 4,885 $ 42,193 $ 27,020 Gross realized gains from sales of debt securities available for sale 32 105 856 255 Gross realized losses from sales of debt securities available for sale — (10) (791) (123) Net realized gain from sales of debt securities available for sale (1) $ 32 $ 95 $ 65 $ 132 (1) The difference in investment security gains, net reported herein as compared to the Consolidated Statements of Income is associated with the net realized gain from the call or maturity of debt securities of $4.0 thousand and $40.0 thousand for the three and nine months ended ended September 30, 2021, respectively, and $11.0 thousand and $22.0 thousand for the three and nine months ended September 30, 2020, respectively.
Schedule of Investments Classified by Contractual Maturity Date	The contractual maturity distribution of investment debt securities at September 30, 2021, is shown below. Expected maturities of MBS and CMO may differ from contractual maturities because the mortgages underlying the securities may be called or prepaid without any penalties. Therefore, these securities are not included in the maturity categories in the following summary. Available For Sale (in thousands) Amortized Cost Fair Value Due in one year or less $ 47,732 $ 48,263 Due after one year through five years 309,686 314,874 Due after five years through ten years 477,290 479,402 Due after ten years 328,454 331,299 $ 1,163,162 $ 1,173,838 Mortgage-backed securities 108,445 109,231 Collateralized mortgage obligations 860,623 853,833 Total $ 2,132,230 $ 2,136,902

Loans Receivable and the Allo_2

Loans Receivable and the Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Schedule of Loans by Lending Classification	The composition of loans by class of receivable was as follows: As of (in thousands) September 30, 2021 December 31, 2020 Agricultural $ 106,356 $ 116,392 Commercial and industrial 927,258 1,055,488 Commercial real estate: Construction & development 146,417 181,291 Farmland 130,936 144,970 Multifamily 273,347 256,525 Commercial real estate-other 1,148,658 1,149,575 Total commercial real estate 1,699,358 1,732,361 Residential real estate: One- to four- family first liens 334,267 355,684 One- to four- family junior liens 133,869 143,422 Total residential real estate 468,136 499,106 Consumer 67,536 78,876 Loans held for investment, net of unearned income 3,268,644 3,482,223 Allowance for credit losses (47,900) (55,500) Total loans held for investment, net $ 3,220,744 $ 3,426,723
Schedule of Loans Based on Delinquency Status	The following table presents the amortized cost basis of loans based on delinquency status: Age Analysis of Past-Due Financial Assets 90 Days or More Past Due And Accruing (in thousands) Current 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total September 30, 2021 Agricultural $ 105,402 $ 152 $ — $ 802 $ 106,356 $ — Commercial and industrial 924,379 351 313 2,215 927,258 50 Commercial real estate: Construction and development 145,714 107 — 596 146,417 — Farmland 127,930 — 119 2,887 130,936 — Multifamily 271,960 — 1,387 — 273,347 — Commercial real estate-other 1,142,251 948 — 5,459 1,148,658 — Total commercial real estate 1,687,855 1,055 1,506 8,942 1,699,358 — Residential real estate: One- to four- family first liens 330,912 2,280 845 230 334,267 — One- to four- family junior liens 133,481 261 20 107 133,869 1 Total residential real estate 464,393 2,541 865 337 468,136 1 Consumer 67,458 41 23 14 67,536 — Total $ 3,249,487 $ 4,140 $ 2,707 $ 12,310 $ 3,268,644 $ 51 December 31, 2020 Agricultural $ 115,284 $ 8 $ 45 $ 1,055 $ 116,392 $ — Commercial and industrial 1,051,727 477 333 2,951 1,055,488 106 Commercial real estate: Construction and development 180,059 586 42 604 181,291 — Farmland 138,798 226 324 5,622 144,970 — Multifamily 256,525 — — — 256,525 — Commercial real estate-other 1,132,015 11,514 318 5,728 1,149,575 — Total commercial real estate 1,707,397 12,326 684 11,954 1,732,361 — Residential real estate: One- to four- family first liens 351,370 2,062 566 1,686 355,684 625 One- to four- family junior liens 142,663 377 234 148 143,422 — Total residential real estate 494,033 2,439 800 1,834 499,106 625 Consumer 78,747 43 39 47 78,876 8 Total $ 3,447,188 $ 15,293 $ 1,901 $ 17,841 $ 3,482,223 $ 739
Schedule of Amortized Cost Basis on Nonaccrual Status	The following table presents the amortized cost basis of loans on non-accrual status, amortized cost basis of loans on non-accrual status with no allowance for credit losses recorded, and loans past due 90 days or more and still accruing by class of loan as of September 30, 2021 and December 31, 2020: Nonaccrual Nonaccrual with no Allowance for Credit Losses 90 Days or More Past Due And Accruing (in thousands) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Agricultural $ 2,120 $ 2,584 $ 1,366 $ 1,599 $ — $ — Commercial and industrial 4,145 7,326 1,341 4,349 50 106 Commercial real estate: Construction and development 607 1,145 596 900 — — Farmland 6,755 8,319 5,338 7,266 — — Multifamily 1,009 746 331 39 — — Commercial real estate-other 16,811 19,134 1,076 2,497 — — Total commercial real estate 25,182 29,344 7,341 10,702 — — Residential real estate: One- to four- family first liens 1,532 1,895 339 75 — 625 One- to four- family junior liens 628 722 — 1 1 — Total residential real estate 2,160 2,617 339 76 1 625 Consumer 50 79 8 13 — 8 Total $ 33,657 $ 41,950 $ 10,395 $ 16,739 $ 51 $ 739
Schedule of Credit Quality Indicator	The following table sets forth the amortized cost basis of loans by class of receivable by credit quality indicator and vintage based on the most recent analysis performed, as of September 30, 2021. As of September 30, 2021, there were no 'loss' rated credits. Term Loans by Origination Year Revolving Loans September 30, 2021 (in thousands) 2021 2020 2019 2018 2017 Prior Total Agricultural Pass $ 21,302 $ 9,886 $ 4,979 $ 1,440 $ 1,126 $ 1,407 $ 55,410 $ 95,550 Special mention / watch 1,220 405 275 — 75 1,000 4,066 7,041 Substandard 673 759 133 229 6 278 1,687 3,765 Doubtful — — — — — — — — Total $ 23,195 $ 11,050 $ 5,387 $ 1,669 $ 1,207 $ 2,685 $ 61,163 $ 106,356 Commercial and industrial Pass $ 245,228 $ 236,565 $ 80,280 $ 41,016 $ 65,928 $ 98,838 $ 136,230 $ 904,085 Special mention / watch 5,485 1,900 704 143 296 139 1,892 10,559 Substandard 1,104 2,154 1,046 924 220 3,016 4,149 12,613 Doubtful — — — — 1 — — 1 Total $ 251,817 $ 240,619 $ 82,030 $ 42,083 $ 66,445 $ 101,993 $ 142,271 $ 927,258 CRE - Construction and development Pass $ 53,757 $ 54,553 $ 7,950 $ 3,266 $ 1,872 $ 922 $ 20,967 $ 143,287 Special mention / watch 622 — 172 406 — — — 1,200 Substandard — 894 1,025 — — 11 — 1,930 Doubtful — — — — — — — — Total $ 54,379 $ 55,447 $ 9,147 $ 3,672 $ 1,872 $ 933 $ 20,967 $ 146,417 CRE - Farmland Pass $ 31,894 $ 36,063 $ 19,419 $ 5,175 $ 6,014 $ 12,113 $ 1,489 $ 112,167 Special mention / watch 1,727 4,092 587 1,421 295 225 75 8,422 Substandard 2,599 2,050 1,465 1,971 1,667 595 — 10,347 Doubtful — — — — — — — — Total $ 36,220 $ 42,205 $ 21,471 $ 8,567 $ 7,976 $ 12,933 $ 1,564 $ 130,936 CRE - Multifamily Pass $ 85,674 $ 130,248 $ 25,013 $ 2,800 $ 6,492 $ 4,929 $ 7,589 $ 262,745 Special mention / watch — — — 5,983 — 558 — 6,541 Substandard — 2,737 — — — 1,324 — 4,061 Doubtful — — — — — — — — Total $ 85,674 $ 132,985 $ 25,013 $ 8,783 $ 6,492 $ 6,811 $ 7,589 $ 273,347 CRE - other Pass $ 243,842 $ 435,676 $ 104,778 $ 41,412 $ 66,205 $ 81,287 $ 44,819 $ 1,018,019 Special mention / watch 5,842 25,278 2,507 10,024 1,832 2,166 1,459 49,108 Substandard 4,309 50,557 12,568 6,163 979 6,955 — 81,531 Doubtful — — — — — — — — Total $ 253,993 $ 511,511 $ 119,853 $ 57,599 $ 69,016 $ 90,408 $ 46,278 $ 1,148,658 RRE - One- to four- family first liens Performing $ 96,842 $ 83,033 $ 31,181 $ 27,093 $ 18,761 $ 71,848 $ 3,978 $ 332,736 Nonperforming 478 47 — 188 164 654 — 1,531 Total $ 97,320 $ 83,080 $ 31,181 $ 27,281 $ 18,925 $ 72,502 $ 3,978 $ 334,267 RRE - One- to four- family junior liens Performing $ 26,283 $ 14,437 $ 4,860 $ 6,132 $ 4,364 $ 5,471 $ 71,692 $ 133,239 Nonperforming — — 139 166 17 203 105 630 Total $ 26,283 $ 14,437 $ 4,999 $ 6,298 $ 4,381 $ 5,674 $ 71,797 $ 133,869 Consumer Performing $ 26,150 $ 18,297 $ 7,134 $ 5,164 $ 2,044 $ 5,800 $ 2,897 $ 67,486 Nonperforming — — 16 8 14 12 — 50 Total $ 26,150 $ 18,297 $ 7,150 $ 5,172 $ 2,058 $ 5,812 $ 2,897 $ 67,536 Total by Credit Quality Indicator Category Pass $ 681,697 $ 902,991 $ 242,419 $ 95,109 $ 147,637 $ 199,496 $ 266,504 $ 2,535,853 Special mention / watch 14,896 31,675 4,245 17,977 2,498 4,088 7,492 82,871 Substandard 8,685 59,151 16,237 9,287 2,872 12,179 5,836 114,247 Doubtful — — — — 1 — — 1 Performing 149,275 115,767 43,175 38,389 25,169 83,119 78,567 533,461 Nonperforming 478 47 155 362 195 869 105 2,211 Total $ 855,031 $ 1,109,631 $ 306,231 $ 161,124 $ 178,372 $ 299,751 $ 358,504 $ 3,268,644 The following table sets forth the amortized cost basis of loans by class of receivable by credit quality indicator and vintage based on the most recent analysis performed, as of December 31, 2020. As of December 31, 2020, there were no 'loss' rated credits. Term Loans by Origination Year Revolving Loans December 31, 2020 (in thousands) 2020 2019 2018 2017 2016 Prior Total Agricultural Pass $ 17,836 $ 6,959 $ 2,764 $ 2,145 $ 1,386 $ 1,833 $ 60,802 $ 93,725 Special mention / watch 4,892 1,083 117 108 553 1,103 7,210 15,066 Substandard 4,075 650 258 183 121 226 2,086 7,599 Doubtful 1 — — — — 1 — 2 Total $ 26,804 $ 8,692 $ 3,139 $ 2,436 $ 2,060 $ 3,163 $ 70,098 $ 116,392 Commercial and industrial Pass $ 546,171 $ 105,523 $ 57,055 $ 61,753 $ 38,695 $ 92,526 $ 120,498 $ 1,022,221 Special mention / watch 3,410 572 497 2,261 611 112 4,796 12,259 Substandard 5,014 1,539 928 656 461 3,261 9,144 21,003 Doubtful — — — 1 — 3 1 5 Total $ 554,595 $ 107,634 $ 58,480 $ 64,671 $ 39,767 $ 95,902 $ 134,439 $ 1,055,488 CRE - Construction and development Pass $ 109,885 $ 25,972 $ 14,994 $ 2,696 $ 679 $ 876 $ 22,519 $ 177,621 Special mention / watch 843 298 542 — 9 3 — 1,695 Substandard 597 1,132 220 — — 26 — 1,975 Doubtful — — — — — — — — Total $ 111,325 $ 27,402 $ 15,756 $ 2,696 $ 688 $ 905 $ 22,519 $ 181,291 CRE - Farmland Pass $ 48,378 $ 25,022 $ 9,577 $ 10,490 $ 8,378 $ 13,003 $ 1,263 $ 116,111 Special mention / watch 8,088 4,583 935 660 361 237 — 14,864 Substandard 3,924 2,627 4,386 1,728 166 1,128 36 13,995 Doubtful — — — — — — — — Total $ 60,390 $ 32,232 $ 14,898 $ 12,878 $ 8,905 $ 14,368 $ 1,299 $ 144,970 CRE - Multifamily Pass $ 164,817 $ 18,992 $ 17,805 $ 10,706 $ 10,201 $ 19,581 $ 11,558 $ 253,660 Special mention / watch 345 — — — 59 — — 404 Substandard 1,099 — — — 1,362 — — 2,461 Doubtful — — — — — — — — Total $ 166,261 $ 18,992 $ 17,805 $ 10,706 $ 11,622 $ 19,581 $ 11,558 $ 256,525 CRE - other Pass $ 487,771 $ 129,388 $ 60,957 $ 83,393 $ 66,369 $ 91,698 $ 45,129 $ 964,705 Special mention / watch 71,141 14,870 12,415 5,953 3,756 4,335 455 112,925 Substandard 48,690 7,162 6,370 1,222 579 6,997 925 71,945 Doubtful — — — — — — — — Total $ 607,602 $ 151,420 $ 79,742 $ 90,568 $ 70,704 $ 103,030 $ 46,509 $ 1,149,575 RRE - One- to four- family first liens Performing $ 117,923 $ 46,581 $ 42,875 $ 30,628 $ 37,407 $ 68,501 $ 9,249 $ 353,164 Nonperforming 239 1 596 303 148 1,233 — 2,520 Total $ 118,162 $ 46,582 $ 43,471 $ 30,931 $ 37,555 $ 69,734 $ 9,249 $ 355,684 RRE - One- to four- family junior liens Performing $ 19,818 $ 7,973 $ 12,140 $ 6,152 $ 3,467 $ 5,354 $ 87,795 $ 142,699 Nonperforming 7 — 223 17 116 190 170 723 Total $ 19,825 $ 7,973 $ 12,363 $ 6,169 $ 3,583 $ 5,544 $ 87,965 $ 143,422 Consumer Performing $ 30,755 $ 13,662 $ 10,341 $ 4,960 $ 2,656 $ 6,306 $ 10,118 $ 78,798 Nonperforming 2 21 13 5 13 24 — 78 Total $ 30,757 $ 13,683 $ 10,354 $ 4,965 $ 2,669 $ 6,330 $ 10,118 $ 78,876 Total by Credit Quality Indicator Category Pass $ 1,374,858 $ 311,856 $ 163,152 $ 171,183 $ 125,708 $ 219,517 $ 261,769 $ 2,628,043 Special mention / watch 88,719 21,406 14,506 8,982 5,349 5,790 12,461 157,213 Substandard 63,399 13,110 12,162 3,789 2,689 11,638 12,191 118,978 Doubtful 1 — — 1 — 4 1 7 Performing 168,496 68,216 65,356 41,740 43,530 80,161 107,162 574,661 Nonperforming 248 22 832 325 277 1,447 170 3,321 Total $ 1,695,721 $ 414,610 $ 256,008 $ 226,020 $ 177,553 $ 318,557 $ 393,754 $ 3,482,223
Schedule of Changes in Allowance for Credit Losses	The changes in the allowance for credit losses by portfolio segment were as follows: For the Three Months Ended September 30, 2021 and 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total For the Three Months Ended September 30, 2021 Beginning balance $ 1,013 $ 13,787 $ 28,516 $ 4,076 $ 608 $ 48,000 Charge-offs (16) (24) (37) (1) (156) (234) Recoveries 19 954 76 25 40 1,114 Credit loss (benefit) expense (1) 44 1,058 (2,226) 5 139 (980) Ending balance $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 For the Three Months Ended September 30, 2020 Beginning balance $ 1,408 $ 18,709 $ 28,221 $ 6,074 $ 1,232 $ 55,644 Charge-offs (746) (983) (275) (83) (101) (2,188) Recoveries 103 180 9 14 41 347 Credit loss (benefit) expense (1) 649 (1,267) 2,966 2,273 76 4,697 Ending balance $ 1,414 $ 16,639 $ 30,921 $ 8,278 $ 1,248 $ 58,500 (1) The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss (benefit) expense of $(0.1) million and $0.3 million related to off-balance sheet credit exposures for the three months ended September 30, 2021 and September 30, 2020, respectively. For the Nine Months Ended September 30, 2021 and 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total For the Nine Months Ended September 30, 2021 Beginning balance $ 1,346 $ 15,689 $ 32,640 $ 4,882 $ 943 $ 55,500 Charge-offs (170) (885) (453) (107) (462) (2,077) Recoveries 67 1,560 391 81 136 2,235 Credit loss (benefit) expense (1) (183) (589) (6,249) (751) 14 (7,758) Ending balance $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 For the Nine Months Ended September 30, 2020 Beginning balance $ 3,748 $ 8,394 $ 13,804 $ 2,685 $ 448 $ 29,079 Day 1 transition adjustment from adoption of ASC 326 (2,557) 2,728 1,300 2,050 463 3,984 Charge-offs (939) (2,356) (1,787) (186) (520) (5,788) Recoveries 129 559 28 29 137 882 Credit loss expense 1,033 7,314 17,576 3,700 720 30,343 Ending balance $ 1,414 $ 16,639 $ 30,921 $ 8,278 $ 1,248 $ 58,500 (1) The difference in the credit loss expense reported herein as compared to the Consolidated Statements of Income is associated with the credit loss (benefit) expense of $(0.2) million and $1.1 million related to off-balance sheet credit exposures for the nine months ended September 30, 2021 and September 30, 2020, respectively. The composition of allowance for credit losses by portfolio segment based on evaluation method were as follows: As of September 30, 2021 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total Loans held for investment, net of unearned income Individually evaluated for impairment $ 1,366 $ 3,084 $ 24,650 $ 570 $ 8 $ 29,678 Collectively evaluated for impairment 104,990 924,174 1,674,708 467,566 67,528 3,238,966 Total $ 106,356 $ 927,258 $ 1,699,358 $ 468,136 $ 67,536 $ 3,268,644 Allowance for credit losses: Individually evaluated for impairment $ — $ 708 $ 2,008 $ 230 $ — $ 2,946 Collectively evaluated for impairment 1,060 15,067 24,321 3,875 631 44,954 Total $ 1,060 $ 15,775 $ 26,329 $ 4,105 $ 631 $ 47,900 As of December 31, 2020 (in thousands) Agricultural Commercial and Industrial Commercial Real Estate Residential Real Estate Consumer Total Loans held for investment, net of unearned income Individually evaluated for impairment $ 2,088 $ 6,582 $ 28,235 $ 427 $ 8 $ 37,340 Collectively evaluated for impairment 114,304 1,048,906 1,704,126 498,679 78,868 3,444,883 Total $ 116,392 $ 1,055,488 $ 1,732,361 $ 499,106 $ 78,876 $ 3,482,223 Allowance for credit losses: Individually evaluated for impairment $ 66 $ 799 $ 2,031 $ 179 $ — $ 3,075 Collectively evaluated for impairment 1,280 14,890 30,609 4,703 943 52,425 Total $ 1,346 $ 15,689 $ 32,640 $ 4,882 $ 943 $ 55,500
Schedule of Financing Receivable, Collateral Depend Loans	The following table presents the amortized cost basis of collateral dependent loans, by the primary collateral type, which are individually evaluated to determine expected credit losses, and the related ACL allocated to these loans: As of September 30, 2021 (in thousands) Primary Type of Collateral Real Estate Equipment Other Total ACL Allocation Agricultural $ 934 $ 432 $ — $ 1,366 $ — Commercial and industrial 407 391 2,286 3,084 708 Commercial real estate: Construction and development 595 — — 595 — Farmland 6,438 — — 6,438 53 Multifamily 1,009 — — 1,009 401 Commercial real estate-other 16,387 — 221 16,608 1,554 Residential real estate: One- to four- family first liens 404 — — 404 64 One- to four- family junior liens 166 — — 166 166 Consumer — 8 — 8 — Total $ 26,340 $ 831 $ 2,507 $ 29,678 $ 2,946 As of December 31, 2020 (in thousands) Primary Type of Collateral Real Estate Equipment Other Total ACL Allocation Agricultural $ 516 $ 824 $ 748 $ 2,088 $ 66 Commercial and industrial 667 3,037 2,878 6,582 799 Commercial real estate: Construction and development 899 — — 899 — Farmland 7,850 — — 7,850 88 Multifamily 746 — — 746 202 Commercial real estate-other 18,740 — — 18,740 1,741 Residential real estate: One- to four- family first liens 204 — — 204 132 One- to four- family junior liens 223 — — 223 47 Consumer — 8 — 8 — Total $ 29,845 $ 3,869 $ 3,626 $ 37,340 $ 3,075
Schedule of TDRs by Class of Financing Receivable	The following table sets forth information on the Company's TDRs by class of financing receivable occurring during the stated periods. TDRs include multiple concessions, and the disclosure classifications in the table are based on the primary concession provided to the borrower. Three Months Ended September 30, 2021 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (dollars in thousands) CONCESSION - Interest rate reduction Commercial and industrial — $ — $ — 1 $ 143 $ 143 CONCESSION - Extended maturity date Commercial real estate-other 2 9,717 9,623 — — — One- to four- family first liens — — — 1 128 132 CONCESSION - Other Agricultural — — — 1 59 69 Farmland — — — 1 150 161 Total 2 $ 9,717 $ 9,623 4 $ 480 $ 505 Nine Months Ended September 30, 2021 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (dollars in thousands) CONCESSION - Interest rate reduction Commercial and industrial — $ — $ — 1 $ 143 $ 143 Farmland 2 1,982 1,982 — — — One- to four- family first liens 1 171 171 — — — CONCESSION - Extended maturity date Commercial real estate-other 2 9,717 9,623 3 759 808 One- to four- family first liens 2 178 178 3 274 278 CONCESSION - Other Agricultural — — — 2 267 278 Farmland — — — 3 504 514 Commercial real estate-other 1 44 44 — — — One- to four- family first liens 1 150 150 — — — Total 9 $ 12,242 $ 12,148 12 $ 1,947 $ 2,021 Loans by class of financing receivable modified as TDRs that redefaulted within 12 months subsequent to restructure during the stated periods were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment (dollars in thousands) CONCESSION - Extended maturity date One- to four- family first liens — — 2 $ 203 — — 2 $ 203 CONCESSION - Other Agricultural — — 1 59 — — 1 59 Farmland — — 1 150 — — 1 150 Total — $ — 4 $ 412 — $ — 4 $ 412

Derivatives, Hedging Activiti_2

Derivatives, Hedging Activities and Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table presents the total notional amounts and gross fair values of the Company’s derivatives as of the dates indicated. The derivative asset and liability balances are presented on a gross basis, prior to the application of master netting agreements, as included in other assets and other liabilities, respectively, on the consolidated balance sheets. The fair values of the Company's derivative instrument assets and liabilities are summarized as follows: As of September 30, 2021 As of December 31, 2020 Notional Amount Fair Value Notional Amount Fair Value (in thousands) Assets Liabilities Assets Liabilities Designated as hedging instruments: Fair value hedges: Interest rate swaps $ 24,994 $ 381 $ 1,542 $ 25,559 $ 34 $ 2,452 Total $ 24,994 $ 381 $ 1,542 $ 25,559 $ 34 $ 2,452 Not designated as hedging instruments: Interest rate swaps $ 351,227 $ 6,014 $ 6,023 $ 347,380 $ 10,758 $ 10,807 RPAs - protection sold 4,291 — — 4,471 4 — RPAs - protection purchased 9,680 — 2 9,825 — 8 Interest rate lock commitments 23,839 316 — — — — Interest rate forward loan sales contracts 24,217 — 107 — — — Total $ 413,254 $ 6,330 $ 6,132 $ 361,676 $ 10,762 $ 10,815
Schedule of Derivatives Instrument Impacts on Statements	The table below presents the effect of cash flow hedge accounting on AOCI for three and nine months ended September 30, 2021 and 2020. Amount of Gain (Loss) Recognized in AOCI on Derivative Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Three Months Ended September 30, Three Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps $ — $ 8 Interest Expense $ — $ (88) Amount of Gain (Loss) Recognized in AOCI on Derivative Location of Gain (Loss) Reclassified from AOCI into Income Amount of Gain (Loss) Reclassified from AOCI into Income Nine Months Ended September 30, Nine Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps $ — $ (1,009) Interest Expense $ — $ (145) The table below presents the effect of the Company’s derivative financial instruments designated as hedging instruments on the consolidated statements of income for the periods indicated: Location and Amount of Gain or Loss Recognized in Income on Fair Value and Cash Flow Hedging Relationships For the Three Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 (in thousands) Interest Income Other Income Interest Income Other Income Interest Income Other Income Interest Income Other Income Total amounts of income and expense line items presented in the consolidated statements of income in which the effects of fair value or cash flow hedges are recorded $ (110) $ — $ (102) $ — $ (329) $ — $ (229) $ — The effects of fair value and cash flow hedging: Gain (loss) on fair value hedging relationships in subtopic 815-20: Interest contracts: Hedged items (199) — (174) — (1,254) — 1,814 — Derivative designated as hedging instruments 157 — 180 — 910 — (1,813) — Income statement effect of cash flow hedging relationships in subtopic 815-20: Interest contracts: Amount reclassified from AOCI into income — — (88) — — — (145) —
Schedule of Hedged Items In Fair Value Hedging Relationship	As of September 30, 2021, the following amounts were recorded on the balance sheet related to cumulative basis adjustment for fair value hedges: Line Item in the Balance Sheet in Which the Hedged Item is Included Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset (in thousands) Loans $ 26,177 $ 1,165
Schedule of Derivatives Not Designated as Hedging Instruments	The following table presents the net gains (losses) recognized on the consolidated statements of income related to the derivatives not designated as hedging instruments for the periods indicated: Location in the Consolidated Statements of Income For the Three Months Ended September 30, For the Nine Months Ended September 30, (in thousands) 2021 2020 2021 2020 Interest rate swaps Other income $ 5 $ (90) $ 40 $ 33 RPAs Other income 1 (3) 2 94 Interest rate lock commitments Loan revenue 316 — 316 — Interest rate forward loan sales contracts Loan revenue (107) — (107) — Total $ 215 $ (93) $ 251 $ 127
Schedule of Offsetting Derivative Assets And Liabilities	The table below presents gross derivatives and the respective collateral received or pledged in the form of other financial instruments as of September 30, 2021 and December 31, 2020, which are generally marketable securities and/or cash. The collateral amounts in the table below are limited to the outstanding balances of the related asset or liability (after netting is applied); thus instances of over-collateralization are not shown. Further, the net amounts of derivative assets or liabilities can be reconciled to the tabular disclosure of fair value. The tabular disclosure of fair value provides the location that derivative assets and liabilities are presented on the consolidated balance sheets. Gross Amounts Not Offset in the Balance Sheet (in thousands) Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Balance Sheet Net Amounts of Assets (Liabilities) presented in the Balance Sheet Financial Instruments Cash Collateral Received (Paid) Net Assets (Liabilities) As of September 30, 2021 Asset Derivatives $ 6,711 $ — $ 6,711 $ — $ — $ 6,711 Liability Derivatives (7,674) — (7,674) — (4,630) (3,044) As of December 31, 2020 Asset Derivatives $ 10,796 $ — $ 10,796 $ — $ — $ 10,796 Liability Derivatives (13,267) — (13,267) — (13,267) —

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table presents the gross carrying amount, accumulated amortization, and net carrying amount of other intangible assets at the dates indicated: As of September 30, 2021 As of December 31, 2020 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangible $ 41,745 $ (29,649) $ 12,096 $ 41,745 $ (26,440) $ 15,305 Customer relationship intangible 5,265 (3,451) 1,814 5,265 (2,630) 2,635 Other 2,700 (2,520) 180 2,700 (2,438) 262 $ 49,710 $ (35,620) $ 14,090 $ 49,710 $ (31,508) $ 18,202 Indefinite-lived trade name intangible $ 7,040 $ 7,040
Schedule of Indefinite-Lived Intangible Assets	The following table presents the gross carrying amount, accumulated amortization, and net carrying amount of other intangible assets at the dates indicated: As of September 30, 2021 As of December 31, 2020 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangible $ 41,745 $ (29,649) $ 12,096 $ 41,745 $ (26,440) $ 15,305 Customer relationship intangible 5,265 (3,451) 1,814 5,265 (2,630) 2,635 Other 2,700 (2,520) 180 2,700 (2,438) 262 $ 49,710 $ (35,620) $ 14,090 $ 49,710 $ (31,508) $ 18,202 Indefinite-lived trade name intangible $ 7,040 $ 7,040
Schedule of Future Amortization Expense	The following table provides the estimated future amortization expense for the remaining three months ending December 31, 2021 and the succeeding annual periods: (in thousands) Core Deposit Intangible Customer Relationship Intangible Other Total 2021 $ 981 $ 241 $ 24 $ 1,246 2022 3,487 797 79 4,363 2023 2,833 518 51 3,402 2024 2,180 239 24 2,443 2025 1,526 19 2 1,547 Thereafter 1,089 — — 1,089 Total $ 12,096 $ 1,814 $ 180 $ 14,090

Other Assets (Tables)

Other Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Schedule of Other Assets	The components of the Company's other assets as of September 30, 2021 and December 31, 2020 were as follows: (in thousands) September 30, 2021 December 31, 2020 Bank-owned life insurance $ 84,822 $ 83,483 Interest receivable 19,076 21,706 FHLB stock 10,319 13,784 Mortgage servicing rights 5,634 5,137 Operating lease right-of-use assets, net 3,093 3,613 Federal and state income taxes, current 1,433 — Federal and state income taxes, deferred 9,298 3,845 Derivative assets 6,711 10,796 Other receivables/assets 12,007 11,129 $ 152,393 $ 153,493

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2021
Deposits [Abstract]
Schedule of Deposit Liabilities	The following table presents the composition of our deposits as of the dates indicated: (in thousands) September 30, 2021 December 31, 2020 Noninterest bearing deposits $ 999,887 $ 910,655 Interest checking deposits 1,464,389 1,351,641 Money market deposits 989,095 918,654 Savings deposits 616,924 529,751 Time deposits under $250 522,907 581,471 Time deposits of $250 or more 364,579 254,877 Total deposits $ 4,957,781 $ 4,547,049

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2021
Short-term Debt [Abstract]
Schedule of Short-Term Borrowings	The following table summarizes our short-term borrowings as of the dates indicated: September 30, 2021 December 31, 2020 (in thousands) Weighted Average Rate Balance Weighted Average Rate Balance Securities sold under agreements to repurchase 0.25 % $ 187,508 0.28 % $ 174,289 Federal Home Loan Bank advances — — 0.29 56,500 Total 0.25 % $ 187,508 0.28 % $ 230,789

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	The table below summarizes the terms of each issuance of junior subordinated notes outstanding as of the dates indicated: (in thousands) Face Value Book Value Interest Rate Rate Maturity Date Callable Date September 30, 2021 ATBancorp Statutory Trust I $ 7,732 $ 6,879 Three-month LIBOR + 1.68% 1.80 % 06/15/2036 06/15/2011 ATBancorp Statutory Trust II 12,372 10,893 Three-month LIBOR + 1.65% 1.77 % 09/15/2037 06/15/2012 Barron Investment Capital Trust I 2,062 1,792 Three-month LIBOR + 2.15% 2.28 % 09/23/2036 09/23/2011 Central Bancshares Capital Trust II 7,217 6,868 Three-month LIBOR + 3.50% 3.62 % 03/15/2038 03/15/2013 MidWestOne Statutory Trust II 15,464 15,464 Three-month LIBOR + 1.59% 1.71 % 12/15/2037 12/15/2012 Total $ 44,847 $ 41,896 December 31, 2020 ATBancorp Statutory Trust I $ 7,732 $ 6,850 Three-month LIBOR + 1.68% 1.90 % 06/15/2036 06/15/2011 ATBancorp Statutory Trust II 12,372 10,850 Three-month LIBOR + 1.65% 1.87 % 09/15/2037 06/15/2012 Barron Investment Capital Trust I 2,062 1,767 Three-month LIBOR + 2.15% 2.39 % 09/23/2036 09/23/2011 Central Bancshares Capital Trust II 7,217 6,832 Three-month LIBOR + 3.50% 3.72 % 03/15/2038 03/15/2013 MidWestOne Statutory Trust II 15,464 15,464 Three-month LIBOR + 1.59% 1.81 % 12/15/2037 12/15/2012 Total $ 44,847 $ 41,763 Long-term borrowings were as follows as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (in thousands) Weighted Average Rate Balance Weighted Average Rate Balance Finance lease payable 8.89 % $ 989 8.89 % $ 1,096 FHLB borrowings 2.76 48,132 1.92 91,198 Total 2.88 % $ 49,121 2.00 % $ 92,294
Schedule of Federal Home Loan Bank, Advances, by Branch of FHLB Bank	As of September 30, 2021, FHLB borrowings were as follows: (in thousands) Weighted Average Rate Amount Due in 2021 — % $ — Due in 2022 2.68 % 31,000 Due in 2023 2.79 % 11,000 Due in 2024 3.15 % 6,000 Total 48,000 Valuation adjustment from acquisition accounting 132 Total $ 48,132

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table presents the computation of basic and diluted earnings per common share for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands, except per share amounts) 2021 2020 2021 2020 Basic Earnings (Loss) Per Share: Net income (loss) $ 16,311 $ (19,824) $ 55,230 $ (10,087) Weighted average shares outstanding 15,840,769 16,099,324 15,938,889 16,111,591 Basic earnings (loss) per common share $ 1.03 $ (1.23) $ 3.47 $ (0.63) Diluted Earnings (Loss) Per Share: Net income (loss) $ 16,311 $ (19,824) $ 55,230 $ (10,087) Weighted average shares outstanding, including all dilutive potential shares 15,863,247 16,099,324 15,963,229 16,111,591 Diluted earnings (loss) per common share $ 1.03 $ (1.23) $ 3.46 $ (0.63)
Schedule of Antidilutive Effect in the Calculation of Diluted Earnings Per Common Share	The weighted average shares that have an antidilutive effect in the calculation of diluted earnings per common share and have been excluded from the computation above were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Dilutive shares (1) — 7,132 — 6,820 (1) Dilutive potential shares that were excluded from the computation of diluted earnings per common share for the three and nine months ended September 30, 2020 as a result of the reported net loss available to common shareholders.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements and Restrictions on Subsidiary Cash (Tables)	9 Months Ended
	Sep. 30, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Schedule of Compliance with Regulatory Capital Requirements Under Banking Regulations	A comparison of the Company's and the Bank's capital with the corresponding minimum regulatory requirements in effect as of September 30, 2021 and December 31, 2020, is presented below: Actual For Capital Adequacy Purposes With Capital Conservation Buffer (1) To Be Well Capitalized Under Prompt Corrective Action Provisions (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio At September 30, 2021 Consolidated: Total capital/risk weighted assets $603,666 13.58% $466,739 10.50% N/A N/A Tier 1 capital/risk weighted assets 497,955 11.20 377,837 8.50 N/A N/A Common equity tier 1 capital/risk weighted assets 456,059 10.26 311,160 7.00 N/A N/A Tier 1 leverage capital/average assets 497,955 8.70 229,025 4.00 N/A N/A MidWest One Bank: Total capital/risk weighted assets $579,124 13.05% $465,857 10.50% $443,674 10.00% Tier 1 capital/risk weighted assets 538,413 12.14 377,123 8.50 354,939 8.00 Common equity tier 1 capital/risk weighted assets 538,413 12.14 310,572 7.00 288,388 6.50 Tier 1 leverage capital/average assets 538,413 9.41 228,764 4.00 285,955 5.00 At December 31, 2020 Consolidated: Total capital/risk weighted assets $572,437 13.41% $448,068 10.50% N/A N/A Tier 1 capital/risk weighted assets 456,526 10.70 362,722 8.50 N/A N/A Common equity tier 1 capital/risk weighted assets 414,763 9.72 298,712 7.00 N/A N/A Tier 1 leverage capital/average assets 456,526 8.50 214,795 4.00 N/A N/A MidWest One Bank: Total capital/risk weighted assets $547,558 12.89% $446,113 10.50% $424,870 10.00% Tier 1 capital/risk weighted assets 500,981 11.79 361,139 8.50 339,896 8.00 Common equity tier 1 capital/risk weighted assets 500,981 11.79 297,409 7.00 276,165 6.50 Tier 1 leverage capital/average assets 500,981 9.35 214,251 4.00 271,992 5.00

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments	The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. The following table summarizes the Bank's commitments as of the dates indicated: September 30, 2021 December 31, 2020 (in thousands) Commitments to extend credit $ 950,157 $ 897,274 Commitments to sell loans 58,679 59,956 Standby letters of credit 19,551 34,212 Total $ 1,028,387 $ 991,442

Fair Value of Financial Instr_2

Fair Value of Financial Instruments and Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measured on Recurring Basis	The following table summarizes assets and liabilities measured at fair value on a recurring basis as of the dates indicated, by level within the fair value hierarchy: Fair Value Measurement at September 30, 2021 Using (in thousands) Total Level 1 Level 2 Level 3 Assets: Available for sale debt securities: U.S. Government agencies and corporations $ 288 $ — $ 288 $ — State and political subdivisions 701,281 — 701,281 — Mortgage-backed securities 109,231 — 109,231 — Collateralized mortgage obligations 853,833 — 853,833 — Corporate debt securities 472,269 — 472,269 — Derivative assets 6,711 — 6,395 316 Mortgage servicing rights 5,634 — 5,634 — Liabilities: Derivative liabilities $ 7,674 $ — $ 7,674 $ — Fair Value Measurement at December 31, 2020 Using (in thousands) Total Level 1 Level 2 Level 3 Assets: Debt securities available for sale: U.S. Government agencies and corporations $ 361 $ — $ 361 $ — State and political subdivisions 628,346 — 628,346 — Mortgage-backed securities 94,018 — 94,018 — Collateralized mortgage obligations 565,836 — 565,836 — Corporate debt securities 368,820 — 368,820 — Derivative assets 10,796 — 10,796 — Mortgage servicing rights 5,137 — 5,137 — Liabilities: Derivative liabilities $ 13,267 $ — $ 13,267 $ —
Schedule of Valuation Techniques	The following table presents the valuation technique, significant unobservable inputs, and quantitative information about the unobservable inputs used for fair value measurements of the financial instruments held by the Company and categorized within Level 3 of the fair value hierarchy as of the dates indicated: Fair Value at (dollars in thousands) September 30, 2021 December 31, 2020 Valuation Techniques(s) Unobservable Input Range of Inputs Weighted Average Interest rate lock commitments $ 316 $ — Quoted or published market prices of similar instruments, adjusted for factors such as pull-through rate assumptions Pull-through rate 88 % - 100 % 88 % The following table presents the valuation technique(s), unobservable inputs, and quantitative information about the unobservable inputs used for fair value measurements of the financial instruments held by the Company and categorized within Level 3 of the fair value hierarchy as of the dates indicated: Fair Value at (dollars in thousands) September 30, 2021 December 31, 2020 Valuation Techniques(s) Unobservable Input Range of Inputs Weighted Average Collateral dependent individually analyzed loans $ 16,340 $ 34,265 Fair value of collateral Valuation adjustments 7 % - 55 % 25 % Foreclosed assets, net $ 454 $ 2,316 Fair value of collateral Valuation adjustments 8 % - 66 % 24 %
Schedule of Fair Value Measured on Nonrecurring Basis	The following table presents assets measured at fair value on a nonrecurring basis as of the dates indicated: Fair Value Measurement at September 30, 2021 Using (in thousands) Total Level 1 Level 2 Level 3 Collateral dependent individually analyzed loans $ 16,340 $ — $ — $ 16,340 Foreclosed assets, net 454 — — 454 Fair Value Measurement at December 31, 2020 Using (in thousands) Total Level 1 Level 2 Level 3 Collateral dependent individually analyzed loans $ 34,265 $ — $ — $ 34,265 Foreclosed assets, net 2,316 — — 2,316
Schedule of Fair Value, by Balance Sheet Grouping	The carrying amount and estimated fair value of financial instruments at September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 138,514 $ 138,514 $ 138,514 $ — $ — Debt securities available for sale 2,136,902 2,136,902 — 2,136,902 — Loans held for sale 58,679 58,786 — 58,786 — Loans held for investment, net 3,220,744 3,238,812 — — 3,238,812 Interest receivable 19,076 19,076 — 19,076 — FHLB stock 10,319 10,319 — 10,319 — Derivative assets 6,711 6,711 — 6,395 316 Financial liabilities: Noninterest bearing deposits 999,887 999,887 999,887 — — Interest bearing deposits 3,957,894 3,956,787 3,070,408 886,379 — Short-term borrowings 187,508 187,508 187,508 — — Finance leases payable 989 989 — 989 — FHLB borrowings 48,132 49,369 — 49,369 — Junior subordinated notes issued to capital trusts 41,896 35,382 — 35,382 — Subordinated debentures 63,843 68,411 — 68,411 — Derivative liabilities 7,674 7,674 — 7,674 — December 31, 2020 (in thousands) Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 82,659 $ 82,659 $ 82,659 $ — $ — Debt securities available for sale 1,657,381 1,657,381 — 1,657,381 — Loans held for sale 59,956 60,039 — 60,039 — Loans held for investment, net 3,426,723 3,469,515 — — 3,469,515 Interest receivable 21,706 21,706 — 21,706 — FHLB stock 13,784 13,784 — 13,784 — Derivative assets 10,796 10,796 — 10,796 — Financial liabilities: Noninterest bearing deposits 910,655 910,655 910,655 — — Interest bearing deposits 3,636,394 3,640,365 2,800,046 840,319 Short-term borrowings 230,789 230,789 230,789 — — Finance leases payable 1,096 1,096 — 1,096 — FHLB borrowings 91,198 93,380 — 93,380 Junior subordinated notes issued to capital trusts 41,763 33,986 — 33,986 Subordinated debentures 74,634 77,228 — 77,228 Derivative liabilities 13,267 13,267 — 13,267 —

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Schedule of Lease Assets and Liabilities	Supplemental balance sheet information related to leases was as follows: (in thousands) Classification September 30, 2021 December 31, 2020 Lease Right-of-Use Assets Operating lease right-of-use assets Other assets $ 3,093 $ 3,613 Finance lease right-of-use asset Premises and equipment, net 470 542 Total right-of-use assets $ 3,563 $ 4,155 Lease Liabilities Operating lease liability Other liabilities $ 4,038 $ 4,583 Finance lease liability Long-term debt 989 1,096 Total lease liabilities $ 5,027 $ 5,679 Weighted-average remaining lease term Operating leases 8.95 years 8.82 years Finance lease 4.92 years 5.67 years Weighted-average discount rate Operating leases 4.05 % 3.92 % Finance lease 8.89 % 8.89 %
Schedule of Lease Costs and Other Information	The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2021 2020 2021 2020 Lease Costs Operating lease cost $ 301 $ 209 $ 894 $ 937 Variable lease cost (3) 42 89 189 Interest on lease liabilities (1) 23 25 69 78 Amortization of right-of-use assets 24 24 72 72 Net lease cost $ 345 $ 300 $ 1,124 $ 1,276 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 553 $ 443 $ 1,655 $ 1,598 Operating cash flows from finance lease 23 25 69 78 Finance cash flows from finance lease 37 32 107 94 Supplemental non-cash information on lease liabilities: Right-of-use assets obtained in exchange for new operating lease liabilities 232 39 232 132 (1) Included in long-term debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in occupancy expense of premises, net.
Schedule of Finance Lease Liability Maturity	Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more for the remaining three months ending December 31, 2021 and the succeeding annual periods were as follows: (in thousands) Finance Leases Operating Leases December 31, 2021 $ 59 $ 295 December 31, 2022 240 1,060 December 31, 2023 245 947 December 31, 2024 250 717 December 31, 2025 255 247 Thereafter 171 1,973 Total undiscounted lease payment $ 1,220 $ 5,239 Amounts representing interest (231) (1,201) Lease liability $ 989 $ 4,038
Schedule of Operating Lease Liability Maturity	Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more for the remaining three months ending December 31, 2021 and the succeeding annual periods were as follows: (in thousands) Finance Leases Operating Leases December 31, 2021 $ 59 $ 295 December 31, 2022 240 1,060 December 31, 2023 245 947 December 31, 2024 250 717 December 31, 2025 255 247 Thereafter 171 1,973 Total undiscounted lease payment $ 1,220 $ 5,239 Amounts representing interest (231) (1,201) Lease liability $ 989 $ 4,038

Nature of Business and Signif_3

Nature of Business and Significant Accounting Policies (Details)	9 Months Ended
	Sep. 30, 2021segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	1

Debt Securities - Schedule of A

Debt Securities - Schedule of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities
Amortized Cost	$ 2,132,230	$ 1,624,103
Gross Unrealized Gains	21,897	34,592
Gross Unrealized Losses	17,225	1,314
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	2,136,902	1,657,381
U.S. Government agencies and corporations
Schedule of Available-for-sale Securities
Amortized Cost	286	355
Gross Unrealized Gains	2	6
Gross Unrealized Losses	0	0
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	288	361
State and political subdivisions
Schedule of Available-for-sale Securities
Amortized Cost	696,306	611,666
Gross Unrealized Gains	9,671	17,163
Gross Unrealized Losses	4,696	483
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	701,281	628,346
Mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	108,445	92,261
Gross Unrealized Gains	1,280	1,758
Gross Unrealized Losses	494	1
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	109,231	94,018
Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Amortized Cost	860,623	559,718
Gross Unrealized Gains	2,564	6,332
Gross Unrealized Losses	9,354	214
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	853,833	565,836
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	466,570	360,103
Gross Unrealized Gains	8,380	9,333
Gross Unrealized Losses	2,681	616
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	$ 472,269	$ 368,820

Debt Securities - Additional In

Debt Securities - Additional Information (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Schedule of Available-for-sale Securities
Pledged securities	$ 542,400	$ 434,700
Securities in continuous unrealized loss position | security	194	57
Accumulated unrealized losses	$ 17,225	$ 1,314
Interest receivable	$ 19,076	$ 21,706
State and political subdivisions
Schedule of Available-for-sale Securities
Securities in continuous unrealized loss position | security	127	27
Accumulated unrealized losses	$ 4,696	$ 483
Mortgage-backed securities
Schedule of Available-for-sale Securities
Securities in continuous unrealized loss position | security	7	7
Accumulated unrealized losses	$ 494	$ 1
Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Securities in continuous unrealized loss position | security	35	8
Accumulated unrealized losses	$ 9,354	$ 214
Mortgage backed securities and collateralized mortgage obligations
Schedule of Available-for-sale Securities
Accumulated unrealized losses	$ 9,800
Corporate debt securities
Schedule of Available-for-sale Securities
Securities in continuous unrealized loss position | security	25	15
Accumulated unrealized losses	$ 2,681	$ 616
Debt securities
Schedule of Available-for-sale Securities
Interest receivable	$ 8,100	$ 7,300

Debt Securities - Available for

Debt Securities - Available for Sale Securities in Continuous Loss Position (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Schedule of Available-for-sale Securities
Number of Securities | security	194	57
Less than 12 months, fair value	$ 1,034,863	$ 200,831
Less than 12 months, unrealized losses	15,720	895
12 Months or more, fair value	56,328	7,376
12 Months or more, unrealized loss	1,505	419
Fair Value	1,091,191	208,207
Unrealized Losses	$ 17,225	$ 1,314
State and political subdivisions
Schedule of Available-for-sale Securities
Number of Securities | security	127	27
Less than 12 months, fair value	$ 254,630	$ 31,489
Less than 12 months, unrealized losses	4,447	157
12 Months or more, fair value	12,474	4,065
12 Months or more, unrealized loss	249	326
Fair Value	267,104	35,554
Unrealized Losses	$ 4,696	$ 483
Mortgage-backed securities
Schedule of Available-for-sale Securities
Number of Securities | security	7	7
Less than 12 months, fair value	$ 45,955	$ 315
Less than 12 months, unrealized losses	494	1
12 Months or more, fair value	44	0
12 Months or more, unrealized loss	0	0
Fair Value	45,999	315
Unrealized Losses	$ 494	$ 1
Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Number of Securities | security	35	8
Less than 12 months, fair value	$ 607,333	$ 133,032
Less than 12 months, unrealized losses	8,913	214
12 Months or more, fair value	25,716	0
12 Months or more, unrealized loss	441	0
Fair Value	633,049	133,032
Unrealized Losses	$ 9,354	$ 214
Corporate debt securities
Schedule of Available-for-sale Securities
Number of Securities | security	25	15
Less than 12 months, fair value	$ 126,945	$ 35,995
Less than 12 months, unrealized losses	1,866	523
12 Months or more, fair value	18,094	3,311
12 Months or more, unrealized loss	815	93
Fair Value	145,039	39,306
Unrealized Losses	$ 2,681	$ 616

Debt Securities - Proceeds and

Debt Securities - Proceeds and Gross Realized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities [Abstract]
Proceeds from sales of debt securities available for sale	$ 782	$ 4,885	$ 42,193	$ 27,020
Gross realized gains from sales of debt securities available for sale	32	105	856	255
Gross realized losses from sales of debt securities available for sale	0	(10)	(791)	(123)
Net realized gain from sales of debt securities available for sale	32	95	65	132
Net gains from call or maturity of debt securities	$ 4	$ 11	$ 40	$ 22

Debt Securities - Investments C

Debt Securities - Investments Classified by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
Due in one year or less, amortized cost	$ 47,732
Due after one year through five years, amortized cost	309,686
Due after five years through ten years, amortized cost	477,290
Due after ten years, amortized cost	328,454
Total maturing securities, amortized cost	1,163,162
Amortized Cost	2,132,230	$ 1,624,103
Fair Value
Due in one year or less, estimated fair value	48,263
Due after one year through five years, estimated fair value	314,874
Due after five years through ten years, estimated fair value	479,402
Due after ten years, estimated fair value	331,299
Total maturing securities, fair value	1,173,838
Debt securities available for sale at fair value	2,136,902	1,657,381
Mortgage-backed securities
Amortized Cost
Amortized Cost	108,445	92,261
Fair Value
Debt securities available for sale at fair value	109,231	94,018
Collateralized mortgage obligations
Amortized Cost
Amortized Cost	860,623	559,718
Fair Value
Debt securities available for sale at fair value	$ 853,833	$ 565,836

Loans Receivable and the Allo_3

Loans Receivable and the Allowance for Credit Losses - Composition of Loans by Lending Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	$ 3,268,644		$ 3,482,223
Allowance for credit losses	(47,900)	$ (48,000)	(55,500)	$ (58,500)	$ (55,644)	$ (29,079)
Total loans held for investment, net	3,220,744		3,426,723
Loans pledged for FHLB debt	815,000		830,200
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	106,356		116,392
Allowance for credit losses	(1,060)	(1,013)	(1,346)	(1,414)	(1,408)	(3,748)
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	927,258		1,055,488
Allowance for credit losses	(15,775)	(13,787)	(15,689)	(16,639)	(18,709)	(8,394)
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	1,699,358		1,732,361
Allowance for credit losses	(26,329)	(28,516)	(32,640)	(30,921)	(28,221)	(13,804)
Commercial real estate | Construction & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	146,417		181,291
Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	130,936		144,970
Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	273,347		256,525
Commercial real estate | Commercial real estate-other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	1,148,658		1,149,575
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	468,136		499,106
Allowance for credit losses	(4,105)	(4,076)	(4,882)	(8,278)	(6,074)	(2,685)
Residential real estate | One- to four- family first liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	334,267		355,684
Residential real estate | One- to four- family junior liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	133,869		143,422
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of unearned income	67,536		78,876
Allowance for credit losses	$ (631)	$ (608)	$ (943)	$ (1,248)	$ (1,232)	$ (448)

Loans Receivable and the Allo_4

Loans Receivable and the Allowance for Credit Losses - Amortized Cost Basis Based on Delinquency Status (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	$ 3,268,644	$ 3,482,223
90 Days or More Past Due And Accruing	51	739
Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	3,249,487	3,447,188
30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	4,140	15,293
60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	2,707	1,901
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	12,310	17,841
Agricultural
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	106,356	116,392
90 Days or More Past Due And Accruing	0	0
Agricultural | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	105,402	115,284
Agricultural | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	152	8
Agricultural | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	45
Agricultural | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	802	1,055
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	927,258	1,055,488
90 Days or More Past Due And Accruing	50	106
Commercial and industrial | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	924,379	1,051,727
Commercial and industrial | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	351	477
Commercial and industrial | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	313	333
Commercial and industrial | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	2,215	2,951
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,699,358	1,732,361
90 Days or More Past Due And Accruing	0	0
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,687,855	1,707,397
Commercial real estate | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,055	12,326
Commercial real estate | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,506	684
Commercial real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	8,942	11,954
Commercial real estate | Construction & development
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	146,417	181,291
90 Days or More Past Due And Accruing	0	0
Commercial real estate | Construction & development | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	145,714	180,059
Commercial real estate | Construction & development | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	107	586
Commercial real estate | Construction & development | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	42
Commercial real estate | Construction & development | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	596	604
Commercial real estate | Farmland
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	130,936	144,970
90 Days or More Past Due And Accruing	0	0
Commercial real estate | Farmland | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	127,930	138,798
Commercial real estate | Farmland | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	226
Commercial real estate | Farmland | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	119	324
Commercial real estate | Farmland | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	2,887	5,622
Commercial real estate | Multifamily
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	273,347	256,525
90 Days or More Past Due And Accruing	0	0
Commercial real estate | Multifamily | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	271,960	256,525
Commercial real estate | Multifamily | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	0
Commercial real estate | Multifamily | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,387	0
Commercial real estate | Multifamily | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	0
Commercial real estate | Commercial real estate-other
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,148,658	1,149,575
90 Days or More Past Due And Accruing	0	0
Commercial real estate | Commercial real estate-other | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	1,142,251	1,132,015
Commercial real estate | Commercial real estate-other | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	948	11,514
Commercial real estate | Commercial real estate-other | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	0	318
Commercial real estate | Commercial real estate-other | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	5,459	5,728
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	468,136	499,106
90 Days or More Past Due And Accruing	1	625
Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	464,393	494,033
Residential real estate | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	2,541	2,439
Residential real estate | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	865	800
Residential real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	337	1,834
Residential real estate | One- to four- family first liens
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	334,267	355,684
90 Days or More Past Due And Accruing	0	625
Residential real estate | One- to four- family first liens | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	330,912	351,370
Residential real estate | One- to four- family first liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	2,280	2,062
Residential real estate | One- to four- family first liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	845	566
Residential real estate | One- to four- family first liens | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	230	1,686
Residential real estate | One- to four- family junior liens
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	133,869	143,422
90 Days or More Past Due And Accruing	1	0
Residential real estate | One- to four- family junior liens | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	133,481	142,663
Residential real estate | One- to four- family junior liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	261	377
Residential real estate | One- to four- family junior liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	20	234
Residential real estate | One- to four- family junior liens | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	107	148
Consumer
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	67,536	78,876
90 Days or More Past Due And Accruing	0	8
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	67,458	78,747
Consumer | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	41	43
Consumer | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	23	39
Consumer | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Loans held for investment, net of unearned income	$ 14	$ 47

Loans Receivable and the Allo_5

Loans Receivable and the Allowance for Credit Losses - Nonaccrual Status and Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 33,657		$ 33,657		$ 41,950
Nonaccrual with no Allowance for Credit Losses	10,395		10,395		16,739
90 Days or More Past Due And Accruing	51		51		739
Financing receivable, nonaccrual, interest income	453	$ 130	1,100	$ 526
Agricultural
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,120		2,120		2,584
Nonaccrual with no Allowance for Credit Losses	1,366		1,366		1,599
90 Days or More Past Due And Accruing	0		0		0
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual	4,145		4,145		7,326
Nonaccrual with no Allowance for Credit Losses	1,341		1,341		4,349
90 Days or More Past Due And Accruing	50		50		106
Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	25,182		25,182		29,344
Nonaccrual with no Allowance for Credit Losses	7,341		7,341		10,702
90 Days or More Past Due And Accruing	0		0		0
Commercial real estate | Construction & development
Financing Receivable, Past Due [Line Items]
Nonaccrual	607		607		1,145
Nonaccrual with no Allowance for Credit Losses	596		596		900
90 Days or More Past Due And Accruing	0		0		0
Commercial real estate | Farmland
Financing Receivable, Past Due [Line Items]
Nonaccrual	6,755		6,755		8,319
Nonaccrual with no Allowance for Credit Losses	5,338		5,338		7,266
90 Days or More Past Due And Accruing	0		0		0
Commercial real estate | Multifamily
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,009		1,009		746
Nonaccrual with no Allowance for Credit Losses	331		331		39
90 Days or More Past Due And Accruing	0		0		0
Commercial real estate | Commercial real estate-other
Financing Receivable, Past Due [Line Items]
Nonaccrual	16,811		16,811		19,134
Nonaccrual with no Allowance for Credit Losses	1,076		1,076		2,497
90 Days or More Past Due And Accruing	0		0		0
Residential real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,160		2,160		2,617
Nonaccrual with no Allowance for Credit Losses	339		339		76
90 Days or More Past Due And Accruing	1		1		625
Residential real estate | One- to four- family first liens
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,532		1,532		1,895
Nonaccrual with no Allowance for Credit Losses	339		339		75
90 Days or More Past Due And Accruing	0		0		625
Residential real estate | One- to four- family junior liens
Financing Receivable, Past Due [Line Items]
Nonaccrual	628		628		722
Nonaccrual with no Allowance for Credit Losses	0		0		1
90 Days or More Past Due And Accruing	1		1		0
Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	50		50		79
Nonaccrual with no Allowance for Credit Losses	8		8		13
90 Days or More Past Due And Accruing	$ 0		$ 0		$ 8

Loans Receivable and the Allo_6

Loans Receivable and the Allowance for Credit Losses - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 855,031	$ 1,695,721
2020	1,109,631	414,610
2019	306,231	256,008
2018	161,124	226,020
2017	178,372	177,553
Prior	299,751	318,557
Revolving Loans	358,504	393,754
Loans held for investment, net of unearned income	3,268,644	3,482,223
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	149,275	168,496
2020	115,767	68,216
2019	43,175	65,356
2018	38,389	41,740
2017	25,169	43,530
Prior	83,119	80,161
Revolving Loans	78,567	107,162
Loans held for investment, net of unearned income	533,461	574,661
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2021	478	248
2020	47	22
2019	155	832
2018	362	325
2017	195	277
Prior	869	1,447
Revolving Loans	105	170
Loans held for investment, net of unearned income	2,211	3,321
Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	23,195	26,804
2020	11,050	8,692
2019	5,387	3,139
2018	1,669	2,436
2017	1,207	2,060
Prior	2,685	3,163
Revolving Loans	61,163	70,098
Loans held for investment, net of unearned income	106,356	116,392
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	251,817	554,595
2020	240,619	107,634
2019	82,030	58,480
2018	42,083	64,671
2017	66,445	39,767
Prior	101,993	95,902
Revolving Loans	142,271	134,439
Loans held for investment, net of unearned income	927,258	1,055,488
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, net of unearned income	1,699,358	1,732,361
Commercial real estate | Construction & development
Financing Receivable, Credit Quality Indicator [Line Items]
2021	54,379	111,325
2020	55,447	27,402
2019	9,147	15,756
2018	3,672	2,696
2017	1,872	688
Prior	933	905
Revolving Loans	20,967	22,519
Loans held for investment, net of unearned income	146,417	181,291
Commercial real estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2021	36,220	60,390
2020	42,205	32,232
2019	21,471	14,898
2018	8,567	12,878
2017	7,976	8,905
Prior	12,933	14,368
Revolving Loans	1,564	1,299
Loans held for investment, net of unearned income	130,936	144,970
Commercial real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	85,674	166,261
2020	132,985	18,992
2019	25,013	17,805
2018	8,783	10,706
2017	6,492	11,622
Prior	6,811	19,581
Revolving Loans	7,589	11,558
Loans held for investment, net of unearned income	273,347	256,525
Commercial real estate | Commercial real estate-other
Financing Receivable, Credit Quality Indicator [Line Items]
2021	253,993	607,602
2020	511,511	151,420
2019	119,853	79,742
2018	57,599	90,568
2017	69,016	70,704
Prior	90,408	103,030
Revolving Loans	46,278	46,509
Loans held for investment, net of unearned income	1,148,658	1,149,575
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, net of unearned income	468,136	499,106
Residential real estate | One- to four- family first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2021	97,320	118,162
2020	83,080	46,582
2019	31,181	43,471
2018	27,281	30,931
2017	18,925	37,555
Prior	72,502	69,734
Revolving Loans	3,978	9,249
Loans held for investment, net of unearned income	334,267	355,684
Residential real estate | One- to four- family first liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	96,842	117,923
2020	83,033	46,581
2019	31,181	42,875
2018	27,093	30,628
2017	18,761	37,407
Prior	71,848	68,501
Revolving Loans	3,978	9,249
Loans held for investment, net of unearned income	332,736	353,164
Residential real estate | One- to four- family first liens | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2021	478	239
2020	47	1
2019	0	596
2018	188	303
2017	164	148
Prior	654	1,233
Revolving Loans	0	0
Loans held for investment, net of unearned income	1,531	2,520
Residential real estate | One- to four- family junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2021	26,283	19,825
2020	14,437	7,973
2019	4,999	12,363
2018	6,298	6,169
2017	4,381	3,583
Prior	5,674	5,544
Revolving Loans	71,797	87,965
Loans held for investment, net of unearned income	133,869	143,422
Residential real estate | One- to four- family junior liens | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	26,283	19,818
2020	14,437	7,973
2019	4,860	12,140
2018	6,132	6,152
2017	4,364	3,467
Prior	5,471	5,354
Revolving Loans	71,692	87,795
Loans held for investment, net of unearned income	133,239	142,699
Residential real estate | One- to four- family junior liens | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	7
2020	0	0
2019	139	223
2018	166	17
2017	17	116
Prior	203	190
Revolving Loans	105	170
Loans held for investment, net of unearned income	630	723
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	26,150	30,757
2020	18,297	13,683
2019	7,150	10,354
2018	5,172	4,965
2017	2,058	2,669
Prior	5,812	6,330
Revolving Loans	2,897	10,118
Loans held for investment, net of unearned income	67,536	78,876
Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	26,150	30,755
2020	18,297	13,662
2019	7,134	10,341
2018	5,164	4,960
2017	2,044	2,656
Prior	5,800	6,306
Revolving Loans	2,897	10,118
Loans held for investment, net of unearned income	67,486	78,798
Consumer | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	2
2020	0	21
2019	16	13
2018	8	5
2017	14	13
Prior	12	24
Revolving Loans	0	0
Loans held for investment, net of unearned income	50	78
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	681,697	1,374,858
2020	902,991	311,856
2019	242,419	163,152
2018	95,109	171,183
2017	147,637	125,708
Prior	199,496	219,517
Revolving Loans	266,504	261,769
Loans held for investment, net of unearned income	2,535,853	2,628,043
Pass | Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	21,302	17,836
2020	9,886	6,959
2019	4,979	2,764
2018	1,440	2,145
2017	1,126	1,386
Prior	1,407	1,833
Revolving Loans	55,410	60,802
Loans held for investment, net of unearned income	95,550	93,725
Pass | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	245,228	546,171
2020	236,565	105,523
2019	80,280	57,055
2018	41,016	61,753
2017	65,928	38,695
Prior	98,838	92,526
Revolving Loans	136,230	120,498
Loans held for investment, net of unearned income	904,085	1,022,221
Pass | Commercial real estate | Construction & development
Financing Receivable, Credit Quality Indicator [Line Items]
2021	53,757	109,885
2020	54,553	25,972
2019	7,950	14,994
2018	3,266	2,696
2017	1,872	679
Prior	922	876
Revolving Loans	20,967	22,519
Loans held for investment, net of unearned income	143,287	177,621
Pass | Commercial real estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2021	31,894	48,378
2020	36,063	25,022
2019	19,419	9,577
2018	5,175	10,490
2017	6,014	8,378
Prior	12,113	13,003
Revolving Loans	1,489	1,263
Loans held for investment, net of unearned income	112,167	116,111
Pass | Commercial real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	85,674	164,817
2020	130,248	18,992
2019	25,013	17,805
2018	2,800	10,706
2017	6,492	10,201
Prior	4,929	19,581
Revolving Loans	7,589	11,558
Loans held for investment, net of unearned income	262,745	253,660
Pass | Commercial real estate | Commercial real estate-other
Financing Receivable, Credit Quality Indicator [Line Items]
2021	243,842	487,771
2020	435,676	129,388
2019	104,778	60,957
2018	41,412	83,393
2017	66,205	66,369
Prior	81,287	91,698
Revolving Loans	44,819	45,129
Loans held for investment, net of unearned income	1,018,019	964,705
Special mention / watch
Financing Receivable, Credit Quality Indicator [Line Items]
2021	14,896	88,719
2020	31,675	21,406
2019	4,245	14,506
2018	17,977	8,982
2017	2,498	5,349
Prior	4,088	5,790
Revolving Loans	7,492	12,461
Loans held for investment, net of unearned income	82,871	157,213
Special mention / watch | Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,220	4,892
2020	405	1,083
2019	275	117
2018	0	108
2017	75	553
Prior	1,000	1,103
Revolving Loans	4,066	7,210
Loans held for investment, net of unearned income	7,041	15,066
Special mention / watch | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,485	3,410
2020	1,900	572
2019	704	497
2018	143	2,261
2017	296	611
Prior	139	112
Revolving Loans	1,892	4,796
Loans held for investment, net of unearned income	10,559	12,259
Special mention / watch | Commercial real estate | Construction & development
Financing Receivable, Credit Quality Indicator [Line Items]
2021	622	843
2020	0	298
2019	172	542
2018	406	0
2017	0	9
Prior	0	3
Revolving Loans	0	0
Loans held for investment, net of unearned income	1,200	1,695
Special mention / watch | Commercial real estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,727	8,088
2020	4,092	4,583
2019	587	935
2018	1,421	660
2017	295	361
Prior	225	237
Revolving Loans	75	0
Loans held for investment, net of unearned income	8,422	14,864
Special mention / watch | Commercial real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	345
2020	0	0
2019	0	0
2018	5,983	0
2017	0	59
Prior	558	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	6,541	404
Special mention / watch | Commercial real estate | Commercial real estate-other
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,842	71,141
2020	25,278	14,870
2019	2,507	12,415
2018	10,024	5,953
2017	1,832	3,756
Prior	2,166	4,335
Revolving Loans	1,459	455
Loans held for investment, net of unearned income	49,108	112,925
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	8,685	63,399
2020	59,151	13,110
2019	16,237	12,162
2018	9,287	3,789
2017	2,872	2,689
Prior	12,179	11,638
Revolving Loans	5,836	12,191
Loans held for investment, net of unearned income	114,247	118,978
Substandard | Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	673	4,075
2020	759	650
2019	133	258
2018	229	183
2017	6	121
Prior	278	226
Revolving Loans	1,687	2,086
Loans held for investment, net of unearned income	3,765	7,599
Substandard | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,104	5,014
2020	2,154	1,539
2019	1,046	928
2018	924	656
2017	220	461
Prior	3,016	3,261
Revolving Loans	4,149	9,144
Loans held for investment, net of unearned income	12,613	21,003
Substandard | Commercial real estate | Construction & development
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	597
2020	894	1,132
2019	1,025	220
2018	0	0
2017	0	0
Prior	11	26
Revolving Loans	0	0
Loans held for investment, net of unearned income	1,930	1,975
Substandard | Commercial real estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,599	3,924
2020	2,050	2,627
2019	1,465	4,386
2018	1,971	1,728
2017	1,667	166
Prior	595	1,128
Revolving Loans	0	36
Loans held for investment, net of unearned income	10,347	13,995
Substandard | Commercial real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,099
2020	2,737	0
2019	0	0
2018	0	0
2017	0	1,362
Prior	1,324	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	4,061	2,461
Substandard | Commercial real estate | Commercial real estate-other
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,309	48,690
2020	50,557	7,162
2019	12,568	6,370
2018	6,163	1,222
2017	979	579
Prior	6,955	6,997
Revolving Loans	0	925
Loans held for investment, net of unearned income	81,531	71,945
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1
2020	0	0
2019	0	0
2018	0	1
2017	1	0
Prior	0	4
Revolving Loans	0	1
Loans held for investment, net of unearned income	1	7
Doubtful | Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	1
Revolving Loans	0	0
Loans held for investment, net of unearned income	0	2
Doubtful | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	1
2017	1	0
Prior	0	3
Revolving Loans	0	1
Loans held for investment, net of unearned income	1	5
Doubtful | Commercial real estate | Construction & development
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	0	0
Doubtful | Commercial real estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	0	0
Doubtful | Commercial real estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	0	0
Doubtful | Commercial real estate | Commercial real estate-other
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Loans held for investment, net of unearned income	$ 0	$ 0

Loans Receivable and the Allo_7

Loans Receivable and the Allowance for Credit Losses - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 48,000	$ 55,644	$ 55,500	$ 29,079
Charge-offs	(234)	(2,188)	(2,077)	(5,788)
Recoveries	1,114	347	2,235	882
Credit loss (benefit) expense	(980)	4,697	(7,758)	30,343
Ending balance	47,900	58,500	47,900	58,500
Credit loss expense, off balance sheet credit exposure	(100)	300	(200)	1,100
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				3,984
Loans receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable	10,800		10,800		$ 14,200
Agricultural
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,013	1,408	1,346	3,748
Charge-offs	(16)	(746)	(170)	(939)
Recoveries	19	103	67	129
Credit loss (benefit) expense	44	649	(183)	1,033
Ending balance	1,060	1,414	1,060	1,414
Agricultural | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				(2,557)
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	13,787	18,709	15,689	8,394
Charge-offs	(24)	(983)	(885)	(2,356)
Recoveries	954	180	1,560	559
Credit loss (benefit) expense	1,058	(1,267)	(589)	7,314
Ending balance	15,775	16,639	15,775	16,639
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				2,728
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	28,516	28,221	32,640	13,804
Charge-offs	(37)	(275)	(453)	(1,787)
Recoveries	76	9	391	28
Credit loss (benefit) expense	(2,226)	2,966	(6,249)	17,576
Ending balance	26,329	30,921	26,329	30,921
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				1,300
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,076	6,074	4,882	2,685
Charge-offs	(1)	(83)	(107)	(186)
Recoveries	25	14	81	29
Credit loss (benefit) expense	5	2,273	(751)	3,700
Ending balance	4,105	8,278	4,105	8,278
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				2,050
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	608	1,232	943	448
Charge-offs	(156)	(101)	(462)	(520)
Recoveries	40	41	136	137
Credit loss (benefit) expense	139	76	14	720
Ending balance	$ 631	$ 1,248	$ 631	1,248
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				$ 463

Loans Receivable and the Allo_8

Loans Receivable and the Allowance for Credit Losses - Allowance for Loan Losses Based on Evaluation Method (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	$ 29,678		$ 37,340
Collectively evaluated for impairment	3,238,966		3,444,883
Loans held for investment, net of unearned income	3,268,644		3,482,223
Allowance for credit losses:
Individually evaluated for impairment	2,946		3,075
Collectively evaluated for impairment	44,954		52,425
Financing receivable, allowance for credit loss	47,900	$ 48,000	55,500	$ 58,500	$ 55,644	$ 29,079
Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	1,366		2,088
Collectively evaluated for impairment	104,990		114,304
Loans held for investment, net of unearned income	106,356		116,392
Allowance for credit losses:
Individually evaluated for impairment	0		66
Collectively evaluated for impairment	1,060		1,280
Financing receivable, allowance for credit loss	1,060	1,013	1,346	1,414	1,408	3,748
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	3,084		6,582
Collectively evaluated for impairment	924,174		1,048,906
Loans held for investment, net of unearned income	927,258		1,055,488
Allowance for credit losses:
Individually evaluated for impairment	708		799
Collectively evaluated for impairment	15,067		14,890
Financing receivable, allowance for credit loss	15,775	13,787	15,689	16,639	18,709	8,394
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	24,650		28,235
Collectively evaluated for impairment	1,674,708		1,704,126
Loans held for investment, net of unearned income	1,699,358		1,732,361
Allowance for credit losses:
Individually evaluated for impairment	2,008		2,031
Collectively evaluated for impairment	24,321		30,609
Financing receivable, allowance for credit loss	26,329	28,516	32,640	30,921	28,221	13,804
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	570		427
Collectively evaluated for impairment	467,566		498,679
Loans held for investment, net of unearned income	468,136		499,106
Allowance for credit losses:
Individually evaluated for impairment	230		179
Collectively evaluated for impairment	3,875		4,703
Financing receivable, allowance for credit loss	4,105	4,076	4,882	8,278	6,074	2,685
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Individually evaluated for impairment	8		8
Collectively evaluated for impairment	67,528		78,868
Loans held for investment, net of unearned income	67,536		78,876
Allowance for credit losses:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	631		943
Financing receivable, allowance for credit loss	$ 631	$ 608	$ 943	$ 1,248	$ 1,232	$ 448

Loans Receivable and the Allo_9

Loans Receivable and the Allowance for Credit Losses - Primary Type of Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	$ 3,220,744		$ 3,426,723
Financing receivable, allowance for credit loss	47,900	$ 48,000	55,500	$ 58,500	$ 55,644	$ 29,079
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	26,340		29,845
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	831		3,869
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	2,507		3,626
Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	29,678		37,340
Financing receivable, allowance for credit loss	2,946		3,075
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	1,060	1,013	1,346	1,414	1,408	3,748
Agricultural | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	934		516
Agricultural | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	432		824
Agricultural | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		748
Agricultural | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	1,366		2,088
Financing receivable, allowance for credit loss	0		66
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	15,775	13,787	15,689	16,639	18,709	8,394
Commercial and industrial | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	407		667
Commercial and industrial | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	391		3,037
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	2,286		2,878
Commercial and industrial | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	3,084		6,582
Financing receivable, allowance for credit loss	708		799
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	26,329	28,516	32,640	30,921	28,221	13,804
Commercial real estate | Construction & development | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	595		899
Commercial real estate | Construction & development | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Construction & development | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Construction & development | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	595		899
Financing receivable, allowance for credit loss	0		0
Commercial real estate | Farmland | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	6,438		7,850
Commercial real estate | Farmland | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Farmland | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Farmland | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	6,438		7,850
Financing receivable, allowance for credit loss	53		88
Commercial real estate | Multifamily | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	1,009		746
Commercial real estate | Multifamily | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Multifamily | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Multifamily | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	1,009		746
Financing receivable, allowance for credit loss	401		202
Commercial real estate | Commercial real estate-other | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	16,387		18,740
Commercial real estate | Commercial real estate-other | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Commercial real estate | Commercial real estate-other | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	221		0
Commercial real estate | Commercial real estate-other | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	16,608		18,740
Financing receivable, allowance for credit loss	1,554		1,741
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	4,105	4,076	4,882	8,278	6,074	2,685
Residential real estate | One- to four- family first liens | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	404		204
Residential real estate | One- to four- family first liens | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Residential real estate | One- to four- family first liens | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Residential real estate | One- to four- family first liens | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	404		204
Financing receivable, allowance for credit loss	64		132
Residential real estate | One- to four- family junior liens | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	166		223
Residential real estate | One- to four- family junior liens | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Residential real estate | One- to four- family junior liens | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Residential real estate | One- to four- family junior liens | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	166		223
Financing receivable, allowance for credit loss	166		47
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss	631	$ 608	943	$ 1,248	$ 1,232	$ 448
Consumer | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Consumer | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	8		8
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	0		0
Consumer | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	8		8
Financing receivable, allowance for credit loss	$ 0		$ 0

Loans Receivable and the All_10

Loans Receivable and the Allowance for Credit Losses - TDR Disclosures (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)contractsecurity	Sep. 30, 2020USD ($)contractsecurity	Sep. 30, 2021USD ($)contractsecurity	Sep. 30, 2020USD ($)contractsecurity	Dec. 31, 2020USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, TDR	$ 19,800		$ 19,800		$ 11,000
Loans and leases receivable, impaired, commitment to lend	$ 8		$ 8
Number of Contracts | contract	2	4	9	12
Pre-Modification Outstanding Recorded Investment	$ 9,717	$ 480	$ 12,242	$ 1,947
Post-Modification Outstanding Recorded Investment	$ 9,623	$ 505	$ 12,148	$ 2,021
TDR, subsequent to restructure, number of contracts | contract	0	4	0	4
TDR, subsequent to restructure, recorded investment	$ 0	$ 412	$ 0	$ 412
COVID-19
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amount of deferrals	$ 4,500		$ 4,500
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDR, subsequent to restructure, number of contracts | contract			0	1
TDR, subsequent to restructure, recorded investment			$ 0	$ 150
Commercial real estate-other | Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | security	2	0
Pre-Modification Outstanding Recorded Investment	$ 9,717	$ 0
Post-Modification Outstanding Recorded Investment	$ 9,623	$ 0
One- to four- family first liens | Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDR, subsequent to restructure, number of contracts | contract	0	2	0	2
TDR, subsequent to restructure, recorded investment	$ 0	$ 203	$ 0	$ 203
Commercial and industrial | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 143	$ 0	$ 143
Post-Modification Outstanding Recorded Investment	$ 0	$ 143	$ 0	$ 143
Commercial real estate | Commercial real estate-other | Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract			2	3
Pre-Modification Outstanding Recorded Investment			$ 9,717	$ 759
Post-Modification Outstanding Recorded Investment			$ 9,623	$ 808
Commercial real estate | Commercial real estate-other | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | security			1	0
Pre-Modification Outstanding Recorded Investment			$ 44	$ 0
Post-Modification Outstanding Recorded Investment			$ 44	$ 0
Residential real estate | One- to four- family first liens | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | security			1	0
Pre-Modification Outstanding Recorded Investment			$ 171	$ 0
Post-Modification Outstanding Recorded Investment			$ 171	$ 0
Residential real estate | One- to four- family first liens | Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1	2	3
Pre-Modification Outstanding Recorded Investment	$ 0	$ 128	$ 178	$ 274
Post-Modification Outstanding Recorded Investment	$ 0	$ 132	$ 178	$ 278
Residential real estate | One- to four- family first liens | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | security			1	0
Pre-Modification Outstanding Recorded Investment			$ 150	$ 0
Post-Modification Outstanding Recorded Investment			$ 150	$ 0
Agricultural | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 59	$ 0	$ 267
Post-Modification Outstanding Recorded Investment	$ 0	$ 69	$ 0	$ 278
TDR, subsequent to restructure, number of contracts | contract	0	1	0	1
TDR, subsequent to restructure, recorded investment	$ 0	$ 59	$ 0	$ 59
Farmland | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | security			2	0
Pre-Modification Outstanding Recorded Investment			$ 1,982	$ 0
Post-Modification Outstanding Recorded Investment			$ 1,982	$ 0
Farmland | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1	0	3
Pre-Modification Outstanding Recorded Investment	$ 0	$ 150	$ 0	$ 504
Post-Modification Outstanding Recorded Investment	$ 0	$ 161	$ 0	$ 514
TDR, subsequent to restructure, number of contracts | contract	0	1
TDR, subsequent to restructure, recorded investment	$ 0	$ 150

Derivatives, Hedging Activiti_3

Derivatives, Hedging Activities and Balance Sheet Offsetting - Derivatives and Hedging Activities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 6,711,000	$ 10,796,000
Derivative liabilities, fair value	7,674,000	13,267,000
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, notional amount	24,994,000	25,559,000
Derivative assets, fair value	381,000	34,000
Derivative liabilities, fair value	1,542,000	2,452,000
Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative, notional amount	24,994,000	25,559,000
Derivative assets, fair value	381,000	34,000
Derivative liabilities, fair value	1,542,000	2,452,000
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, notional amount	413,254,000	361,676,000
Derivative assets, fair value	6,330,000	10,762,000
Derivative liabilities, fair value	6,132,000	10,815,000
Not Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative, notional amount	351,227,000	347,380,000
Derivative assets, fair value	6,014,000	10,758,000
Derivative liabilities, fair value	6,023,000	10,807,000
Not Designated as Hedging Instrument | RPAs | RPAs - protection sold
Derivatives, Fair Value [Line Items]
Derivative, notional amount	4,291,000	4,471,000
Derivative assets, fair value	0	4,000
Derivative liabilities, fair value	0	0
Not Designated as Hedging Instrument | RPAs | RPAs - protection purchased
Derivatives, Fair Value [Line Items]
Derivative, notional amount	9,680,000	9,825,000
Derivative assets, fair value	0	0
Derivative liabilities, fair value	2,000	8,000
Not Designated as Hedging Instrument | Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative, notional amount	23,839,000	0
Derivative assets, fair value	316,000	0
Derivative liabilities, fair value	0	0
Not Designated as Hedging Instrument | Interest rate forward loan sales contracts
Derivatives, Fair Value [Line Items]
Derivative, notional amount	24,217,000	0
Derivative assets, fair value	0	0
Derivative liabilities, fair value	$ 107,000	$ 0

Derivatives, Hedging Activiti_4

Derivatives, Hedging Activities and Balance Sheet Offsetting - Additional Information (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Feb. 29, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of derivatives in a net liability position, including accrued interest	$ 6,300,000
Cash collateral paid	4,630,000	$ 13,267,000
Assets needed for immediate settlement, aggregate fair value	6,300,000
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	24,994,000	25,559,000
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	413,254,000	361,676,000
Interest rate swaps | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	24,994,000	25,559,000
Interest rate swaps | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	351,227,000	347,380,000
Interest rate swaps | Cash flow hedges | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount			$ 30,000,000
Interest rate forward loan sales contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	24,217,000	0
Interest rate lock commitments on mortgage loans | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 23,800,000	$ 13,000,000

Derivatives, Hedging Activiti_5

Derivatives, Hedging Activities and Balance Sheet Offsetting - Schedule of Impacts on Statements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative	$ 0	$ 8	$ 0	$ (1,009)
Amount of Gain (Loss) Reclassified from AOCI into Income	0	(88)	0	(145)
Interest Income	40,340	37,809	117,462	113,927
Designated as Hedging Instrument | Interest rate swaps | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative	0	8	0	(1,009)
Designated as Hedging Instrument | Interest rate swaps | Fair value hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Interest Income	(110)	(102)	(329)	(229)
Other Income	0	0	0	0
Designated as Hedging Instrument | Interest rate swaps | Interest Expense | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0	(88)	0	(145)
Designated as Hedging Instrument | Interest rate swaps | Interest Income | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from AOCI into income	0	(88)	0	(145)
Designated as Hedging Instrument | Interest rate swaps | Interest Income | Fair value hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Hedged items	(199)	(174)	(1,254)	1,814
Derivative designated as hedging instruments	157	180	910	(1,813)
Designated as Hedging Instrument | Interest rate swaps | Other income | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from AOCI into income	0	0	0	0
Designated as Hedging Instrument | Interest rate swaps | Other income | Fair value hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Hedged items	0	0	0	0
Derivative designated as hedging instruments	$ 0	$ 0	$ 0	$ 0

Derivatives, Hedging Activiti_6

Derivatives, Hedging Activities and Balance Sheet Offsetting - Hedged Items in Fair Value Hedging Relationship (Details) - Interest rate swaps - Designated as Hedging Instrument - Fair value hedges: $ in Thousands	Sep. 30, 2021USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Amount of the Hedged Assets	$ 26,177
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset	$ 1,165

Derivatives, Hedging Activiti_7

Derivatives, Hedging Activities and Balance Sheet Offsetting - Schedule of Other Derivatives Not Designated as Hedging Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging, gain (loss)	$ 215	$ (93)	$ 251	$ 127
Interest rate swaps | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging, gain (loss)	5	(90)	40	33
RPAs | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging, gain (loss)	1	(3)	2	94
Interest rate lock commitments | Loan revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging, gain (loss)	316	0	316	0
Interest rate forward loan sales contracts | Loan revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives not designated as hedging, gain (loss)	$ (107)	$ 0	$ (107)	$ 0

Derivatives, Hedging Activiti_8

Derivatives, Hedging Activities and Balance Sheet Offsetting - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Asset Derivatives
Gross Amounts of Recognized Assets (Liabilities)	$ 6,711	$ 10,796
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets (Liabilities) presented in the Balance Sheet	6,711	10,796
Financial Instruments	0	0
Cash Collateral Received (Paid)	0	0
Net Assets (Liabilities)	6,711	10,796
Liability Derivatives
Gross Amounts of Recognized Assets (Liabilities)	(7,674)	(13,267)
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets (Liabilities) presented in the Balance Sheet	(7,674)	(13,267)
Financial Instruments	0	0
Cash Collateral Received (Paid)	(4,630)	(13,267)
Net Assets (Liabilities)	$ (3,044)	$ 0

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Goodwill and Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 62,477	$ 62,477

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 49,710	$ 49,710
Accumulated Amortization	(35,620)	(31,508)
Net Carrying Amount	14,090	18,202
Indefinite-lived trade name intangible	7,040	7,040
Core deposit intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	41,745	41,745
Accumulated Amortization	(29,649)	(26,440)
Net Carrying Amount	12,096	15,305
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,265	5,265
Accumulated Amortization	(3,451)	(2,630)
Net Carrying Amount	1,814	2,635
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,700	2,700
Accumulated Amortization	(2,520)	(2,438)
Net Carrying Amount	$ 180	$ 262

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Estimated Remaining Amortization Expense for the Year Ending December 31,
2021	$ 1,246
2022	4,363
2023	3,402
2024	2,443
2025	1,547
Thereafter	1,089
Net Carrying Amount	14,090	$ 18,202
Core deposit intangible
Estimated Remaining Amortization Expense for the Year Ending December 31,
2021	981
2022	3,487
2023	2,833
2024	2,180
2025	1,526
Thereafter	1,089
Net Carrying Amount	12,096	15,305
Customer relationship intangible
Estimated Remaining Amortization Expense for the Year Ending December 31,
2021	241
2022	797
2023	518
2024	239
2025	19
Thereafter	0
Net Carrying Amount	1,814	2,635
Other
Estimated Remaining Amortization Expense for the Year Ending December 31,
2021	24
2022	79
2023	51
2024	24
2025	2
Thereafter	0
Net Carrying Amount	$ 180	$ 262

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets [Abstract]
Bank-owned life insurance	$ 84,822	$ 83,483
Interest receivable	19,076	21,706
FHLB stock	10,319	13,784
Mortgage servicing rights	5,634	5,137
Operating lease right-of-use assets, net	3,093	3,613
Federal and state income taxes, current	1,433	0
Federal and state income taxes, deferred	9,298	3,845
Derivative assets	6,711	10,796
Other receivables/assets	12,007	11,129
Other assets	$ 152,393	$ 153,493

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
Noninterest bearing deposits	$ 999,887	$ 910,655
Interest checking deposits	1,464,389	1,351,641
Money market deposits	989,095	918,654
Savings deposits	616,924	529,751
Time deposits under $250	522,907	581,471
Time deposits of $250 or more	364,579	254,877
Total deposits	4,957,781	4,547,049
Domestic time deposit, brokered	5,600	7,800
Domestic non-time deposit, brokered	52,600	14,800
Deposits of government entities	$ 265,900	$ 156,700

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - USD ($)	Oct. 22, 2021	Sep. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Weighted Average Rate		0.25%	0.28%
Short-term borrowings		$ 187,508,000	$ 230,789,000
Pledged securities		$ 542,400,000	$ 434,700,000
Securities sold under agreements to repurchase
Short-term Debt [Line Items]
Weighted Average Rate		0.25%	0.28%
Short-term borrowings		$ 187,508,000	$ 174,289,000
Federal Home Loan Bank advances
Short-term Debt [Line Items]
Weighted Average Rate		0.00%	0.29%
Short-term borrowings		$ 0	$ 56,500,000
Federal funds purchased
Short-term Debt [Line Items]
Short-term borrowings		0	0
Unsecured line of credit, maximum borrowing capacity		170,000,000
Federal Reserve Bank advances
Short-term Debt [Line Items]
Short-term borrowings		0	0
Financing capacity		62,700,000	67,700,000
Pledged securities		67,800,000	72,000,000
Unsecured line of credit
Short-term Debt [Line Items]
Short-term borrowings		0	$ 0
Unsecured line of credit, maximum borrowing capacity		$ 25,000,000
Unused commitment fee percentage		0.30%
Unsecured line of credit | Subsequent Event
Short-term Debt [Line Items]
Unsecured line of credit, maximum borrowing capacity	$ 25,000,000
Unsecured line of credit | LIBOR
Short-term Debt [Line Items]
Debt instrument, basis spread on variable rate		1.75%
Unsecured line of credit | SOFR Rate | Subsequent Event
Short-term Debt [Line Items]
Debt instrument, basis spread on variable rate	1.70%

Long-Term Debt - Junior Subordi

Long-Term Debt - Junior Subordinated Notes (Details) - Junior subordinated notes - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt instrument, face amount	$ 44,847,000	$ 44,847,000
Debt instrument, book value	$ 41,896,000	41,763,000
Stated maturity date	5 years
ATBancorp Statutory Trust I
Debt Instrument [Line Items]
Debt instrument, face amount	$ 7,732,000	7,732,000
Debt instrument, book value	$ 6,879,000	$ 6,850,000
Interest rate	1.80%	1.90%
ATBancorp Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.68%	1.68%
ATBancorp Statutory Trust II
Debt Instrument [Line Items]
Debt instrument, face amount	$ 12,372,000	$ 12,372,000
Debt instrument, book value	$ 10,893,000	$ 10,850,000
Interest rate	1.77%	1.87%
ATBancorp Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.65%	1.65%
Barron Investment Capital Trust I
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,062,000	$ 2,062,000
Debt instrument, book value	$ 1,792,000	$ 1,767,000
Interest rate	2.28%	2.39%
Barron Investment Capital Trust I | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.15%	2.15%
Central Bancshares Capital Trust II
Debt Instrument [Line Items]
Debt instrument, face amount	$ 7,217,000	$ 7,217,000
Debt instrument, book value	$ 6,868,000	$ 6,832,000
Interest rate	3.62%	3.72%
Central Bancshares Capital Trust II | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.50%	3.50%
MidWestOne Statutory Trust II
Debt Instrument [Line Items]
Debt instrument, face amount	$ 15,464,000	$ 15,464,000
Debt instrument, book value	$ 15,464,000	$ 15,464,000
Interest rate	1.71%	1.81%
MidWestOne Statutory Trust II | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.59%	1.59%

Long-Term Debt - Subordinated D

Long-Term Debt - Subordinated Debentures (Details) - Subordinated debt - USD ($) $ in Thousands	Jul. 28, 2020	Sep. 30, 2021	May 01, 2019
Debt Instrument [Line Items]
Debt instrument, face amount			$ 10,900
Interest rate			6.50%
Percentage of debentures categorized as tier 2 capital		100.00%	20.00%
Percentage of debentures, decrease to tier 2 treatment, per year		20.00%
Decrease to tier 2 treatment, period of recognition		5 years
5.75% Fixed to floating subordinated notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 63,750
Interest rate	5.75%
5.75% Fixed to floating subordinated notes | Private placement
Debt Instrument [Line Items]
Sale of equity	$ 65,000

Long-Term Debt - Other Long-Ter

Long-Term Debt - Other Long-Term Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finance lease payable
Debt Instrument [Line Items]
Weighted Average Rate	8.89%	8.89%
Balance	$ 989	$ 1,096
FHLB borrowings
Debt Instrument [Line Items]
Weighted Average Rate	2.76%	1.92%
Balance	$ 48,132	$ 91,198
Federal home loan, bank advances general debt obligations, disclosures maximum borrowing capacity as percentage of total assets	45.00%
Other long-term debt
Debt Instrument [Line Items]
Weighted Average Rate	2.88%	2.00%
Balance	$ 49,121	$ 92,294

Long-Term Debt - Federal Home L

Long-Term Debt - Federal Home Loan Bank Advances (Details) $ in Thousands	Sep. 30, 2021USD ($)
Weighted Average Rate
Due in 2021	0.00%
Due in 2022	2.68%
Due in 2023	2.79%
Due in 2024	3.15%
Amount
Due in 2021	$ 0
Due in 2022	31,000
Due in 2023	11,000
Due in 2024	6,000
Total	48,000
Valuation adjustment from acquisition accounting	132
Total	$ 48,132

Earnings per Share - Basic And

Earnings per Share - Basic And Diluted Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic Earnings (Loss) Per Share:
Net income (loss)	$ 16,311	$ (19,824)	$ 55,230	$ (10,087)
Weighted average shares outstanding (in shares)	15,840,769	16,099,324	15,938,889	16,111,591
Basic earnings (loss) per common share (in dollars per share)	$ 1.03	$ (1.23)	$ 3.47	$ (0.63)
Diluted Earnings (Loss) Per Share:
Net income (loss)	$ 16,311	$ (19,824)	$ 55,230	$ (10,087)
Weighted average shares outstanding, including all dilutive potential shares (in shares)	15,863,247	16,099,324	15,963,229	16,111,591
Diluted earnings (loss) per common share (in dollars per share)	$ 1.03	$ (1.23)	$ 3.46	$ (0.63)

Earnings per Share - Anti-Dilut

Earnings per Share - Anti-Dilutive Shares (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Dilutive shares (in shares)	0	7,132	0	6,820

Regulatory Capital Requiremen_3

Regulatory Capital Requirements and Restrictions on Subsidiary Cash (Details)	May 31, 2021USD ($)	Jul. 28, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)	May 01, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash reserve deposit required and made			$ 0		$ 0
Capital			$ 603,666,000		$ 572,437,000
Capital to risk weighted assets			0.1358		0.1341
Capital required for capital adequacy			$ 466,739,000		$ 448,068,000
Capital required for capital adequacy to risk weighted assets			0.1050		0.1050
Tier one risk based capital			$ 497,955,000		$ 456,526,000
Tier one risk based capital to risk weighted assets			0.1120		0.1070
Tier one risk based capital required for capital adequacy			$ 377,837,000		$ 362,722,000
Tier one risk based capital required for capital adequacy to risk weighted assets			0.0850		0.0850
Common equity tier one capital			$ 456,059,000		$ 414,763,000
Common equity tier one capital to risk weighted assets			10.26%		9.72%
Common equity tier one capital required for capital adequacy			$ 311,160,000		$ 298,712,000
Common equity tier one capital required for capital adequacy to risk weighted assets			7.00%		7.00%
Tier one leverage capital			$ 497,955,000		$ 456,526,000
Tier one leverage capital to average assets			0.0870		0.0850
Tier one leverage capital required for capital adequacy			$ 229,025,000		$ 214,795,000
Tier one leverage capital required for capital adequacy to average assets			0.0400		0.0400
Capital conservation buffer			0.0250		0.0250
Repayments of subordinated debt	$ 10,800,000		$ 10,835,000	$ 0
Subordinated debt
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest rate						6.50%
5.75% Fixed to floating subordinated notes | Subordinated debt
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest rate		5.75%
5.75% Fixed to floating subordinated notes | Subordinated debt | Private placement
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Sale of equity		$ 65,000,000
MidWestOne Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital			$ 579,124,000		$ 547,558,000
Capital to risk weighted assets			0.1305		0.1289
Capital required for capital adequacy			$ 465,857,000		$ 446,113,000
Capital required for capital adequacy to risk weighted assets			0.1050		0.1050
Capital required to be well capitalized			$ 443,674,000		$ 424,870,000
Capital required to be well capitalized to risk weighted assets			0.1000		0.1000
Tier one risk based capital			$ 538,413,000		$ 500,981,000
Tier one risk based capital to risk weighted assets			0.1214		0.1179
Tier one risk based capital required for capital adequacy			$ 377,123,000		$ 361,139,000
Tier one risk based capital required for capital adequacy to risk weighted assets			0.0850		0.0850
Tier one risk based capital required to be well capitalized			$ 354,939,000		$ 339,896,000
Tier one risk based capital required to be well capitalized to risk weighted assets			0.0800		0.0800
Common equity tier one capital			$ 538,413,000		$ 500,981,000
Common equity tier one capital to risk weighted assets			12.14%		11.79%
Common equity tier one capital required for capital adequacy			$ 310,572,000		$ 297,409,000
Common equity tier one capital required for capital adequacy to risk weighted assets			7.00%		7.00%
Common equity tier one risk based capital required to be well capitalized			$ 288,388,000		$ 276,165,000
Common equity tier one risk based capital required to be well capitalized to risk weighted assets			6.50%		6.50%
Tier one leverage capital			$ 538,413,000		$ 500,981,000
Tier one leverage capital to average assets			0.0941		0.0935
Tier one leverage capital required for capital adequacy			$ 228,764,000		$ 214,251,000
Tier one leverage capital required for capital adequacy to average assets			0.0400		0.0400
Tier one leverage capital required to be well capitalized			$ 285,955,000		$ 271,992,000
Tier one leverage capital required to be well capitalized to average assets			0.0500		0.0500

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Other commitment	$ 1,028,387	$ 991,442
Commitments to sell loans
Other Commitments [Line Items]
Other commitment	58,679	59,956
Commitments to extend credit
Other Commitments [Line Items]
Other commitment	950,157	897,274
Standby letters of credit
Other Commitments [Line Items]
Other commitment	$ 19,551	$ 34,212

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Concentration Risk [Line Items]
Off-balance sheet, credit loss, liability	$ 3.9		$ 3.9		$ 4.1
Credit loss expense, off balance sheet credit exposure	$ (0.1)	$ 0.3	$ (0.2)	$ 1.1
Credit Concentration Risk | Loans Concentration | Commercial real estate
Concentration Risk [Line Items]
Concentration risk, percentage			62.00%
Credit Concentration Risk | Loans Concentration | Agricultural Related Loan Financing Receivable
Concentration Risk [Line Items]
Concentration risk, percentage			7.00%
Credit Concentration Risk | Investment Securities | State and political subdivisions | IOWA
Concentration Risk [Line Items]
Concentration risk, percentage			18.00%
Credit Concentration Risk | Investment Securities | State and political subdivisions | MINNESOTA
Concentration Risk [Line Items]
Concentration risk, percentage			13.00%

Fair Value of Financial Instr_3

Fair Value of Financial Instruments and Fair Value Measurements - Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	$ 2,136,902	$ 1,657,381
Derivative assets	6,711	10,796
Mortgage servicing rights	5,634	5,137
Derivative liabilities	7,674	13,267
U.S. Government agencies and corporations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	288	361
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	701,281	628,346
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	109,231	94,018
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	472,269	368,820
Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	316	0
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	6,711	10,796
Mortgage servicing rights	5,634	5,137
Derivative liabilities	7,674	13,267
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	0	0
Mortgage servicing rights	0	0
Derivative liabilities	0	0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	6,395	10,796
Mortgage servicing rights	5,634	5,137
Derivative liabilities	7,674	13,267
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	316	0
Mortgage servicing rights	0	0
Derivative liabilities	0	0
Recurring | U.S. Government agencies and corporations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	288	361
Recurring | U.S. Government agencies and corporations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | U.S. Government agencies and corporations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	288	361
Recurring | U.S. Government agencies and corporations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	701,281	628,346
Recurring | State and political subdivisions | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | State and political subdivisions | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	701,281	628,346
Recurring | State and political subdivisions | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	109,231	94,018
Recurring | Mortgage-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	109,231	94,018
Recurring | Mortgage-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	853,833	565,836
Recurring | Collateralized mortgage obligations | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Collateralized mortgage obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	853,833	565,836
Recurring | Collateralized mortgage obligations | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	472,269	368,820
Recurring | Corporate debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	0	0
Recurring | Corporate debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	472,269	368,820
Recurring | Corporate debt securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt securities available for sale	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments and Fair Value Measurements - Valuation Techniques (Details) $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, fair value	$ 6,711	$ 10,796
Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, fair value	6,711	10,796
Level 3 | Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, fair value	316	0
Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets, fair value	$ 316	$ 0
Interest rate lock commitments | Minimum | Level 3 | Recurring | Pull-through rate | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	0.88
Interest rate lock commitments | Maximum | Level 3 | Recurring | Pull-through rate | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	1
Interest rate lock commitments | Weighted Average | Level 3 | Recurring | Pull-through rate | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	0.88

Fair Value of Financial Instr_5

Fair Value of Financial Instruments and Fair Value Measurements - Measured on a Nonrecurring Basis (Details) $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	$ 454	$ 2,316
Nonrecurring | Collateral dependent individually analyzed loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Collateral dependent individually analyzed loans	16,340	34,265
Nonrecurring | Collateral dependent individually analyzed loans | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Collateral dependent individually analyzed loans	0	0
Nonrecurring | Collateral dependent individually analyzed loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Collateral dependent individually analyzed loans	0	0
Nonrecurring | Collateral dependent individually analyzed loans | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Collateral dependent individually analyzed loans	$ 16,340	34,265
Nonrecurring | Collateral dependent individually analyzed loans | Level 3 | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.07
Nonrecurring | Collateral dependent individually analyzed loans | Level 3 | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.55
Nonrecurring | Collateral dependent individually analyzed loans | Level 3 | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.25
Nonrecurring | Foreclosed assets, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	$ 454	2,316
Nonrecurring | Foreclosed assets, net | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	0	0
Nonrecurring | Foreclosed assets, net | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	0	0
Nonrecurring | Foreclosed assets, net | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	$ 454	$ 2,316
Nonrecurring | Foreclosed assets, net | Level 3 | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.08
Nonrecurring | Foreclosed assets, net | Level 3 | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.66
Nonrecurring | Foreclosed assets, net | Level 3 | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.24

Fair Value of Financial Instr_6

Fair Value of Financial Instruments and Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Debt securities available for sale	$ 2,136,902	$ 1,657,381
Interest receivable	19,076	21,706
FHLB stock	10,319	13,784
Derivative assets	6,711	10,796
Financial liabilities:
Interest bearing deposits	1,464,389	1,351,641
Short-term borrowings	187,508	230,789
Finance leases payable	989	1,096
Derivative liabilities	7,674	13,267
Carrying Amount
Financial assets:
Cash and cash equivalents	138,514	82,659
Debt securities available for sale	2,136,902	1,657,381
Loans held for sale	58,679	59,956
Loans held for investment, net	3,220,744	3,426,723
Interest receivable	19,076	21,706
FHLB stock	10,319
Derivative assets	6,711	10,796
Financial liabilities:
Noninterest bearing deposits	999,887	910,655
Interest bearing deposits	3,957,894	3,636,394
Short-term borrowings	187,508	230,789
Finance leases payable	989	1,096
FHLB borrowings	48,132	91,198
Junior subordinated notes issued to capital trusts	41,896	41,763
Subordinated debentures	63,843	74,634
Derivative liabilities	7,674	13,267
Estimated Fair Value
Financial assets:
Cash and cash equivalents	138,514	82,659
Debt securities available for sale	2,136,902	1,657,381
Loans held for sale	58,786	60,039
Loans held for investment, net	3,238,812	3,469,515
Interest receivable	19,076	21,706
FHLB stock	10,319	13,784
Derivative assets	6,711	10,796
Financial liabilities:
Noninterest bearing deposits	999,887	910,655
Interest bearing deposits	3,956,787	3,640,365
Short-term borrowings	187,508	230,789
Finance leases payable	989	1,096
FHLB borrowings	49,369	93,380
Junior subordinated notes issued to capital trusts	35,382	33,986
Subordinated debentures	68,411	77,228
Derivative liabilities	7,674	13,267
Level 1 | Estimated Fair Value
Financial assets:
Cash and cash equivalents	138,514	82,659
Debt securities available for sale	0	0
Loans held for sale	0	0
Loans held for investment, net	0	0
Interest receivable	0	0
FHLB stock	0	0
Derivative assets	0	0
Financial liabilities:
Noninterest bearing deposits	999,887	910,655
Interest bearing deposits	3,070,408	2,800,046
Short-term borrowings	187,508	230,789
Finance leases payable	0	0
FHLB borrowings	0	0
Junior subordinated notes issued to capital trusts	0	0
Subordinated debentures	0	0
Derivative liabilities	0	0
Level 2 | Estimated Fair Value
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	2,136,902	1,657,381
Loans held for sale	58,786	60,039
Loans held for investment, net	0	0
Interest receivable	19,076	21,706
FHLB stock	10,319	13,784
Derivative assets	6,395	10,796
Financial liabilities:
Noninterest bearing deposits	0	0
Interest bearing deposits	886,379	840,319
Short-term borrowings	0	0
Finance leases payable	989	1,096
FHLB borrowings	49,369	93,380
Junior subordinated notes issued to capital trusts	35,382	33,986
Subordinated debentures	68,411	77,228
Derivative liabilities	7,674	13,267
Level 3 | Estimated Fair Value
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	0	0
Loans held for sale	0	0
Loans held for investment, net	3,238,812	3,469,515
Interest receivable		0
FHLB stock		0
Derivative assets	316	0
Financial liabilities:
Noninterest bearing deposits	0	0
Interest bearing deposits	0
Short-term borrowings		0
Finance leases payable	0	0
FHLB borrowings	0
Junior subordinated notes issued to capital trusts	0
Subordinated debentures	0
Derivative liabilities	$ 0	$ 0

Leases - Assets and Liabilities

Leases - Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2021USD ($)lease	Dec. 31, 2020USD ($)
Leases [Abstract]
Number of leases | lease	1
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 3,093	$ 3,613
Finance lease right-of-use asset	470	542
Total right-of-use assets	3,563	4,155
Lease Liabilities
Operating lease liability	4,038	4,583
Finance lease liability	989	1,096
Total lease liabilities	$ 5,027	$ 5,679
Weighted-average remaining lease term
Operating leases	8 years 11 months 12 days	8 years 9 months 25 days
Finance lease	4 years 11 months 1 day	5 years 8 months 1 day
Weighted-average discount rate
Operating leases	4.05%	3.92%
Finance lease	8.89%	8.89%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Long-term debt	Long-term debt

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease cost	$ 301	$ 209	$ 894	$ 937
Variable lease cost	(3)	42	89	189
Interest on lease liabilities	23	25	69	78
Amortization of right-of-use assets	24	24	72	72
Net lease cost	345	300	1,124	1,276
Operating cash flows from operating leases	553	443	1,655	1,598
Operating cash flows from finance lease	23	25	69	78
Finance cash flows from finance lease	37	32	107	94
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 232	$ 39	$ 232	$ 132

Leases - Maturity Schedule (Det

Leases - Maturity Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finance Leases
December 31, 2021	$ 59
December 31, 2022	240
December 31, 2023	245
December 31, 2024	250
December 31, 2025	255
Thereafter	171
Total undiscounted lease payment	1,220
Amounts representing interest	(231)
Finance lease liability	989	$ 1,096
Operating Leases
December 31, 2021	295
December 31, 2022	1,060
December 31, 2023	947
December 31, 2024	717
December 31, 2025	247
Thereafter	1,973
Total undiscounted lease payment	5,239
Amounts representing interest	(1,201)
Operating lease liability	$ 4,038	$ 4,583

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Nov. 01, 2021	Oct. 22, 2021	Nov. 02, 2021	Oct. 19, 2021	Sep. 30, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Long-term debt					$ 154,860,000	$ 208,691,000
Notes payable to unaffiliated bank
Subsequent Event [Line Items]
Long-term debt					0
Unsecured line of credit
Subsequent Event [Line Items]
Unsecured line of credit, maximum borrowing capacity					$ 25,000,000
Subsequent Event | Iowa First Bancshares
Subsequent Event [Line Items]
Cash consideration	$ 47,600,000
Subsequent Event | Unsecured line of credit
Subsequent Event [Line Items]
Unsecured line of credit, maximum borrowing capacity		$ 25,000,000
Subsequent Event | Unsecured line of credit | SOFR Rate
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate		1.70%
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Dividends payable (in dollars per share)				$ 0.2250
Stock repurchased during period (in shares)			37,700
Stock repurchased during period, value			$ 1,200,000
Stock repurchase program, remaining authorized repurchase amount			$ 6,400,000

Uncategorized Items - mofg-2021

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]