Heartland Financial USA (HTLF) 10-Q 5 Aug 21 2021 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2021	Aug. 04, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-15393
Entity Registrant Name	HEARTLAND FINANCIAL USA, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	42-1405748
Entity Address, Address Line One	1398 Central Avenue
Entity Address, City or Town	Dubuque
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	52001
City Area Code	563
Local Phone Number	589-2100
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		42,245,788
Entity Central Index Key	0000920112
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock, par value $1.00 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $1.00 per share
Trading Symbol	HTLF
Security Exchange Name	NASDAQ
Depositary Shares, each representing 1/400th interest in a share of 7.00% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing 1/400th interest in a share of 7.00% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	HTLFP
Security Exchange Name	NASDAQ

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 208,702	$ 219,243
Interest bearing deposits with other banks and other short-term investments	240,426	118,660
Cash and cash equivalents	449,128	337,903
Time deposits in other financial institutions	3,138	3,129
Securities:
Carried at fair value (cost of $6,463,683 at June 30, 2021, and $6,024,225 at December 31, 2020)	6,543,978	6,127,975
Held to maturity, net of allowance for credit losses of $51 at June 30, 2021, and $51 at December 31, 2020 (fair value of $95,421 at June 30, 2021, and $100,041 at December 31, 2020)	85,439	88,839
Other investments, at cost	76,809	75,253
Loans held for sale	33,248	57,949
Loans receivable:
Held to maturity	10,012,014	10,023,051
Allowance for credit losses	(120,726)	(131,606)
Loans receivable, net	9,891,288	9,891,445
Premises, furniture and equipment, net	219,433	219,595
Premises, furniture and equipment held for sale	6,925	6,499
Other real estate, net	6,314	6,624
Goodwill	576,005	576,005
Core deposit intangibles and customer relationship intangibles, net	37,452	42,383
Servicing rights, net	6,201	6,052
Cash surrender value on life insurance	189,619	187,664
Other assets	246,029	281,024
TOTAL ASSETS	18,371,006	17,908,339
Deposits:
Demand	6,299,289	5,688,810
Savings	8,189,223	8,019,704
Time	1,126,606	1,271,391
Total deposits	15,615,118	14,979,905
Short-term borrowings	152,563	167,872
Other borrowings	271,244	457,042
Accrued expenses and other liabilities	172,295	224,289
TOTAL LIABILITIES	16,211,220	15,829,108
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 60,000,000 shares authorized at both June 30, 2021, and December 31, 2020; issued 42,245,452 shares at June 30, 2021, and 42,093,862 shares at December 31, 2020)	42,245	42,094
Capital surplus	1,066,765	1,062,083
Retained earnings	883,484	791,630
Accumulated other comprehensive income	56,587	72,719
TOTAL STOCKHOLDERS' EQUITY	2,159,786	2,079,231
TOTAL LIABILITIES AND EQUITY	18,371,006	17,908,339
Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series A Junior Participating preferred stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series B Fixed Rate Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series D Senior Non-Cumulative Perpetual Convertible Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Series E Fixed-Rate Reset Cumulative Perpetual Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 110,705	$ 110,705

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Securities carried at fair value, cost	$ 6,463,683	$ 6,024,225
Held to maturity, allowance for credit losses	51	51
Estimated Fair Value	$ 95,421	$ 100,041
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	42,245,452	42,093,862
Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	6,104	6,104
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series A Junior Participating preferred stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	16,000	16,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series B Fixed Rate Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	81,698	81,698
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series C Senior Non-Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	81,698	81,698
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series D Senior Non-Cumulative Perpetual Convertible Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	3,000	3,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series E Fixed-Rate Reset Cumulative Perpetual Preferred Stock
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	11,500	11,500
Preferred stock, shares issued (in shares)	11,500
Preferred stock, shares outstanding (in shares)	11,500
Obligations of states and political subdivisions
Held to maturity, allowance for credit losses	$ 51	$ 51
Estimated Fair Value	$ 95,421	$ 100,041

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
INTEREST INCOME:
Interest and fees on loans	$ 111,915	$ 107,005	$ 224,354	$ 213,419
Interest on securities:
Taxable	31,546	23,362	61,989	45,093
Nontaxable	4,561	3,344	9,064	5,527
Interest on federal funds sold	0	0	1	0
Interest on interest bearing deposits in other financial institutions	60	54	126	775
TOTAL INTEREST INCOME	148,082	133,765	295,534	264,814
INTEREST EXPENSE:
Interest on deposits	3,790	6,134	8,185	20,716
Interest on short-term borrowings	98	61	250	357
Interest on other borrowings (includes $(461) and $(423) of interest expense related to derivatives reclassified from accumulated other comprehensive income (loss) for the three months ended June 30, 2021 and 2020, respectively, and $(1,058) and $(613) of interest expense related to derivatives reclassified from accumulated other comprehensive income (loss) for the six months ended June 30, 2021 and 2020, respectively)	2,976	3,424	6,276	7,084
TOTAL INTEREST EXPENSE	6,864	9,619	14,711	28,157
NET INTEREST INCOME	141,218	124,146	280,823	236,657
Provision (benefit) for credit losses	(7,080)	26,796	(7,728)	48,316
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	148,298	97,350	288,551	188,341
NONINTEREST INCOME:
Revenue from contract with customers	22,036	16,544	42,337	34,320
Loan servicing income	873	379	1,711	1,342
Securities gains, net (includes $2,842 and $2,006 of net security gains reclassified from accumulated other comprehensive income (loss) for the three months ended June 30, 2021 and 2020, respectively, and $2,812 and $3,664 of net security gains reclassified from accumulated other comprehensive income (loss) for the six months ended June 30, 2021 and 2020, respectively)	2,842	2,006	2,812	3,664
Unrealized gain (loss) on equity securities, net	83	680	(27)	449
Net gains on sale of loans held for sale	4,753	7,857	11,173	12,517
Valuation adjustment on servicing rights	(526)	9	391	(1,556)
Income on bank owned life insurance	937	1,167	1,766	1,665
Other noninterest income	2,166	1,995	3,318	4,053
TOTAL NONINTEREST INCOME	33,164	30,637	63,481	56,454
NONINTEREST EXPENSES:
Salaries and employee benefits	57,332	50,118	116,394	100,075
Occupancy	7,399	6,502	15,317	12,973
Furniture and equipment	3,501	2,993	6,594	6,101
Professional fees	16,237	13,676	29,727	26,149
Advertising	1,649	995	3,118	3,200
Core deposit and customer relationship intangibles amortization	2,415	2,696	4,931	5,677
Other real estate and loan collection expenses	414	203	549	537
Loss on sales/valuations of assets, net	183	701	377	717
Acquisition, integration and restructuring costs	210	673	3,138	2,049
Partnership investment in tax credit projects	1,345	791	1,380	975
Other noninterest expenses	12,691	11,091	24,274	22,845
TOTAL NONINTEREST EXPENSES	103,376	90,439	205,799	181,298
INCOME BEFORE INCOME TAXES	78,086	37,548	146,233	63,497
Income taxes (includes $834 and $614 of income tax expense reclassified from accumulated other comprehensive income (loss) for the three months ended June 30, 2021 and 2020, respectively, and $977 and $1,080 of income tax expense reclassified from accumulated other comprehensive income (loss) for the six months ended June 30, 2021 and 2020, respectively)	16,481	7,417	31,814	13,326
NET INCOME	61,605	30,131	114,419	50,171
Preferred dividends	(2,012)	0	(4,025)	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 59,593	$ 30,131	$ 110,394	$ 50,171
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.41	$ 0.82	$ 2.62	$ 1.36
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	1.41	0.82	2.61	1.36
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.22	$ 0.20	$ 0.44	$ 0.40
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 15,132	$ 10,972	$ 28,803	$ 22,993
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	6,039	4,977	11,816	9,999
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 865	$ 595	$ 1,718	$ 1,328

CONSOLIDATED STATEMENTS OF IN_2

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest expense	$ 2,976	$ 3,424	$ 6,276	$ 7,084
Gain (loss) on securities	2,842	2,006	2,812	3,664
Income tax expense (benefit)	16,481	7,417	31,814	13,326
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Accumulated Net Gain (Loss) from Derivatives
Interest expense	(461)	(423)	(1,058)	(613)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Accumulated Net Unrealized Investment Gain (Loss)
Gain (loss) on securities	2,842	2,006	2,812	3,664
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss)
Income tax expense (benefit)	$ 834	$ 614	$ 977	$ 1,080

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 61,605	$ 30,131	$ 114,419	$ 50,171
Securities:
Net change in unrealized gain/(loss) on securities	70,224	81,552	(20,645)	53,224
Reclassification adjustment for net gains realized in net income	(2,842)	(2,006)	(2,812)	(3,664)
Income taxes	(17,678)	(20,729)	6,083	(12,932)
Other comprehensive gain/(loss) on securities	49,704	58,817	(17,374)	36,628
Derivatives used in cash flow hedging relationships:
Net change in unrealized gain/(loss) on derivatives	745	317	2,633	(3,363)
Reclassification adjustment for net gains on derivatives realized in net income	(461)	(423)	(1,058)	(613)
Income taxes	(61)	18	(333)	832
Other comprehensive income (loss) on cash flow hedges	223	(88)	1,242	(3,144)
Other comprehensive income (loss)	49,927	58,729	(16,132)	33,484
TOTAL COMPREHENSIVE INCOME	$ 111,532	$ 88,860	$ 98,287	$ 83,655

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 61,605	$ 30,131	$ 114,419	$ 50,171
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			13,671	14,071
Provision (benefit) for credit losses			(7,728)	48,316
Net amortization of premium on securities			18,439	6,251
Securities gains, net	(2,842)	(2,006)	(2,812)	(3,664)
Unrealized (gain) loss on equity securities, net			27	(449)
Stock based compensation			4,776	3,558
Loans originated for sale			(244,752)	(271,167)
Proceeds on sales of loans held for sale			279,923	254,523
Net gains on sale of loans held for sale			(10,470)	(10,990)
(Increase) decrease in accrued interest receivable			813	(4,298)
Increase in prepaid expenses			(1,324)	(910)
Decrease in accrued interest payable			(1,342)	(1,699)
Capitalization of servicing rights			(703)	(1,527)
Valuation adjustment on servicing rights	526	(9)	(391)	1,556
Loss on sales/valuations of assets, net			377	717
Net excess tax benefit (expense) from stock based compensation			303	(91)
Other, net			(9,645)	(53,313)
NET CASH PROVIDED BY OPERATING ACTIVITIES			153,581	31,055
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of time deposits in other financial institutions			(9)	(7)
Proceeds from the sale of securities available for sale	423,415	182,749	630,481	511,639
Proceeds from the maturity of and principal paydowns on securities available for sale			484,958	212,538
Proceeds from the maturity of and principal paydowns on securities held to maturity			4,127	1,832
Proceeds from the maturity of time deposits in other financial institutions			0	150
Proceeds from the sale, maturity of and principal paydowns on other investments			2,498	6,135
Purchase of securities available for sale			(1,571,281)	(1,491,459)
Purchase of other investments			(4,054)	(10,273)
Net (increase) decrease in loans			5,203
Net (increase) decrease in loans				(881,419)
Purchase of bank owned life insurance policies			(190)	(201)
Capital expenditures			(11,539)	(7,679)
Proceeds from the sale of equipment			3,090	3,331
Proceeds on sale of OREO and other repossessed assets			1,858	1,783
NET CASH USED BY INVESTING ACTIVITIES			(454,858)	(1,653,630)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits			610,479	1,287,288
Net increase in savings deposits			169,519	502,871
Net decrease in time deposit accounts			(144,785)	(125,791)
Net decrease in short-term borrowings			(15,309)	(12,799)
Proceeds from short term advances			1,700	516,545
Repayments of short term advances			(1,700)	(597,741)
Proceeds from other borrowings			0	33,750
Repayments of other borrowings			(186,356)	(3,622)
Net proceeds from the issuance of preferred stock			0	110,705
Proceeds from issuance of common stock			1,519	928
Dividends paid			(22,565)	(14,715)
NET CASH PROVIDED BY FINANCING ACTIVITIES			412,502	1,697,419
Net increase in cash and cash equivalents			111,225	74,844
Cash and cash equivalents at beginning of year			337,903	378,734	$ 378,734
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 449,128	$ 453,578	449,128	453,578	$ 337,903
Supplemental disclosures:
Cash paid for income/franchise taxes			31,735	12,798
Cash paid for interest			16,053	29,856
Loans transferred to OREO			1,186	1,055
Transfer of premises from premises, furniture and equipment, net, to premises, furniture and equipment held for sale			1,564	0
Transfer of premises from premises, furniture and equipment held for sale to premises, furniture and equipment, net			6	0
Dividends declared, not paid			2,013	0
Transfer of available for sale securities to held to maturity securities			$ 0	$ 462

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Series E Preferred Stock	Impact of ASU 2016-13 adoption	Adjusted balance at January 1, 2020	Preferred Stock	Preferred StockAdjusted balance at January 1, 2020	Common Stock	Common StockAdjusted balance at January 1, 2020	Capital Surplus	Capital SurplusAdjusted balance at January 1, 2020	Retained Earnings	Retained EarningsImpact of ASU 2016-13 adoption	Retained EarningsAdjusted balance at January 1, 2020	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Adjusted balance at January 1, 2020
Balance at beginning of period at Dec. 31, 2019	$ 1,578,137		$ (14,891)	$ 1,563,246	$ 0	$ 0	$ 36,704	$ 36,704	$ 839,857	$ 839,857	$ 702,502	$ (14,891)	$ 687,611	$ (926)	$ (926)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	83,655										50,171			33,484
Cash dividends declared:
Common	(14,715)										(14,715)
Issuance of shares of Series E stock		$ 110,705
Issuance of shares of common stock	928						141		787
Stock based compensation	3,558								3,558
Balance at end of period at Jun. 30, 2020	1,747,377				110,705		36,845		844,202		723,067			32,558
Balance at beginning of period at Mar. 31, 2020	1,553,714				0		36,807		842,780		700,298			(26,171)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	88,860										30,131			58,729
Cash dividends declared:
Common	(7,362)										(7,362)
Issuance of shares of Series E stock	110,705				110,705
Issuance of shares of common stock	124						38		86
Stock based compensation	1,336								1,336
Balance at end of period at Jun. 30, 2020	1,747,377				$ 110,705		36,845		844,202		723,067			32,558
Cash dividends declared:
Shares of preferred stock issued (in shares)					11,500
Balance at beginning of period at Dec. 31, 2020	2,079,231				$ 110,705		42,094		1,062,083		791,630			72,719
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	98,287										114,419			(16,132)
Cash dividends declared:
Preferred	(4,025)										(4,025)
Common	(18,540)										(18,540)
Issuance of shares of common stock	57						151		(94)
Stock based compensation	4,776								4,776
Balance at end of period at Jun. 30, 2021	2,159,786				110,705		42,245		1,066,765		883,484			56,587
Balance at beginning of period at Mar. 31, 2021	2,056,207				110,705		42,174		1,063,497		833,171			6,660
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	111,532										61,605			49,927
Cash dividends declared:
Preferred	(2,012)										(2,012)
Common	(9,280)										(9,280)
Issuance of shares of common stock	1,323						71		1,252
Stock based compensation	2,016								2,016
Balance at end of period at Jun. 30, 2021	$ 2,159,786				$ 110,705		$ 42,245		$ 1,066,765		$ 883,484			$ 56,587

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019
Cash dividends per share common stock (in dollars per share)	$ 0.22	$ 0.20	$ 0.44	$ 0.40
Shares of common stock issued (in shares)	71,777	37,527	151,590	140,466
Accounting Standards Update [Extensible List]					us-gaap:AccountingStandardsUpdate201602Member
Cash dividends per share preferred stock (in dollars per share)	$ 175		$ 350
Preferred Stock
Shares of preferred stock issued (in shares)		11,500

BASIS OF PRESENTATION

BASIS OF PRESENTATION	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The interim unaudited consolidated financial statements contained herein should be read in conjunction with the audited consolidated financial statements and accompanying notes to the consolidated financial statements for the fiscal year ended December 31, 2020, included in the Form 10-K of Heartland Financial USA, Inc. ("HTLF") filed with the Securities and Exchange Commission ("SEC") on February 25, 2021 . Foot note disclosures to the interim unaudited consolidated financial statements which would substantially duplicate the disclosure contained in the footnotes to the audited consolidated financial statements have been omitted. The financial information included herein has been prepared in accordance with U.S. generally accepted accounting principles for interim financial reporting and has been prepared pursuant to the rules and regulations for reporting on Form 10-Q and Rule 10-01 of Regulation S-X. Such information reflects all adjustments (consisting of normal recurring adjustments), that are, in the opinion of management, necessary for a fair presentation of the financial position and results of operations for the periods presented. The results of the interim period ended June 30, 2021, are not necessarily indicative of the results expected for the year ending December 31, 2021. Earnings Per Share Basic earnings per share is determined using net income available to common stockholders and weighted average common shares outstanding. Diluted earnings per share is computed by dividing net income available to common stockholders by the weighted average common shares and assumed incremental common shares issued. Amounts used in the determination of basic and diluted earnings per share for the three- and six- months ended June 30, 2021, and 2020, are shown in the table below, dollars and number of shares in thousands, except per share data: Three Months Ended 2021 2020 Net income $ 61,605 $ 30,131 Preferred dividends (2,012) — Net income available to common stockholders $ 59,593 $ 30,131 Weighted average common shares outstanding for basic earnings per share 42,243 36,881 Assumed incremental common shares issued upon vesting of outstanding restricted stock units 117 35 Weighted average common shares for diluted earnings per share 42,360 36,916 Earnings per common share — basic $ 1.41 $ 0.82 Earnings per common share — diluted $ 1.41 $ 0.82 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation 1 54 Six Months Ended 2021 2020 Net income $ 114,419 $ 50,171 Preferred dividends (4,025) — Net income available to stockholders $ 110,394 $ 50,171 Weighted average common shares outstanding for basic earnings per share 42,210 36,851 Assumed incremental common shares issued upon vesting of outstanding restricted stock units 147 69 Weighted average common shares for diluted earnings per share 42,357 36,920 Earnings per common share — basic $ 2.62 $ 1.36 Earnings per common share — diluted $ 2.61 $ 1.36 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation 60 1 Subsequent Events - HTLF has evaluated subsequent events that may require recognition or disclosure through the filing date of this Quarterly Report on Form 10-Q with the SEC. Effect of New Financial Accounting Standards ASU 2018-16 In October 2018, the FASB issued ASU 2018-16, " Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting." In the United States, eligible benchmark interest rates under Topic 815 are interest rates on direct Treasury obligations of the U.S. government, the London Interbank Offered Rate ("LIBOR") swap rate, and the Overnight Index Swap ("OIS") Rate based on the Fed Funds Effective Rate. When the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , in August 2017, it introduced the Securities Industry and Financial Markets Association ("SIFMA") Municipal Swap Rate as the fourth permissible U.S. benchmark rate. ASU 2018-16 adds the OIS rate based on the Secured Overnight Financing Rate ("SOFR") as a U.S. benchmark interest rate to facilitate the LIBOR to SOFR transition and provide sufficient lead time for entities to prepare for changes to interest rate risk hedging strategies for both risk management and hedge accounting purposes. ASU 2018-16 became effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years and the financial statement impact immediately upon adoption was immaterial. The future financial statement impact will depend on any new contracts entered into using new benchmark rates, as well as any existing contracts that are migrated from LIBOR to new benchmark interest rates. HTLF has a formal working group that is currently evaluating the impact of the transition from LIBOR as an interest rate benchmark to other potential alternative reference rates, including but not limited to the SOFR. Currently, HTLF has adjustable rate loans, several debt obligations and securities and derivative instruments in place that reference LIBOR-based rates. The transition from LIBOR is expected to take place at the end of 2021, and management will continue to actively assess the related opportunities and risks involved in this transition. ASU 2019-12 In December 2019, the FASB issued ASU 2019-12, "Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes." ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU 2019-12 also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. HTLF adopted this ASU on January 1, 2021, as required, and the adoption did not have a material impact on its results of operations, financial position and liquidity. ASU 2020-04 In March 2020, the FASB issued ASU 2020-04, " Reference Rate Reform, " which provides optional expedients and exceptions for applying GAAP to loan and lease agreements, derivative contracts, and other transactions affected by the anticipated transition away from LIBOR toward new interest rate benchmarks. For loan and lease agreements that are modified because of reference rate reform and that meet certain scope guidance (i) modifications of loan agreements should be accounted for by prospectively adjusting the effective interest rate, and the modifications would be considered "minor" with the result that any existing unamortized origination fees/costs would carry forward and continue to be amortized and (ii) modifications of lease agreements should be accounted for as a continuation of the existing agreement, with no reassessments of the lease classification and the discount rate or remeasurements of lease payments that otherwise would be required for modifications not accounted for as separate contracts. ASU 2020-04 also provides numerous optional expedients for derivative accounting. ASU 2020-04 is effective March 12, 2020 through December 31, 2022. An entity may elect to apply ASU 2020-04 for contract modifications as of January 1, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. Once elected for a Topic or an Industry Subtopic within the ASC, ASU 2020-04 must be applied prospectively for all eligible contract modifications for that Topic or Industry Subtopic. HTLF anticipates that ASU 2020-04 will simplify any modifications executed between the selected start date and December 31, 2022 that are directly related to LIBOR transition by allowing prospective recognition of the continuation of the contract, rather than extinguishment of the old contract that would result in writing off unamortized fees/costs. Management will continue to actively assess the impacts of ASU 2020-04 and the related opportunities and risks involved in the LIBOR transition.

ACQUISITIONS

ACQUISITIONS	6 Months Ended
	Jun. 30, 2021
Business Combinations [Abstract]
ACQUISITIONS	ACQUISITIONS Johnson Bank branches On December 4, 2020, Arizona Bank & Trust ("AB&T"), a wholly-owned subsidiary headquartered in Phoenix, Arizona, completed its acquisition of certain assets and assumed substantially all of the deposits and certain other liabilities of Johnson Bank's Arizona operations, which includes four banking centers. Johnson Bank is a wholly-owned subsidiary of Johnson Financial Group, Inc., headquartered in Racine, Wisconsin. As of the closing date, AB&T acquired, at fair value, total assets of $419.7 million, which included gross loans of $150.7 million and assumed deposits of $415.5 million and certain other liabilities. AIM Bancshares, Inc.

SECURITIES

SECURITIES	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES The amortized cost, gross unrealized gains and losses, and estimated fair values of debt securities available for sale and equity securities with a readily determinable fair value that are carried at fair value as of June 30, 2021, and December 31, 2020, are summarized in the table below, in thousands: Amortized Gross Gross Estimated June 30, 2021 U.S. treasuries $ 996 $ 20 $ — $ 1,016 U.S. agencies 35,591 272 (492) 35,371 Obligations of states and political subdivisions 1,817,708 66,037 (11,959) 1,871,786 Mortgage-backed securities - agency 1,741,389 19,890 (20,604) 1,740,675 Mortgage-backed securities - non-agency 1,349,005 16,062 (1,775) 1,363,292 Commercial mortgage-backed securities - agency 124,441 2,439 (1,800) 125,080 Commercial mortgage-backed securities - non-agency 534,682 823 (200) 535,305 Asset-backed securities 835,476 12,640 (1,129) 846,987 Corporate bonds 3,744 71 — 3,815 Total debt securities 6,443,032 118,254 (37,959) 6,523,327 Equity securities with a readily determinable fair value 20,651 — — 20,651 Total $ 6,463,683 $ 118,254 $ (37,959) $ 6,543,978 December 31, 2020 U.S. treasuries $ 1,995 $ 31 $ — $ 2,026 U.S. agencies 167,048 657 (926) 166,779 Obligations of states and political subdivisions 1,562,631 75,555 (2,959) 1,635,227 Mortgage-backed securities - agency 1,351,964 16,029 (12,723) 1,355,270 Mortgage-backed securities - non-agency 1,428,068 22,688 (1,640) 1,449,116 Commercial mortgage-backed securities - agency 171,451 3,440 (738) 174,153 Commercial mortgage-backed securities - non-agency 253,421 37 (691) 252,767 Asset-backed securities 1,064,255 9,421 (4,410) 1,069,266 Corporate bonds 3,763 8 (29) 3,742 Total debt securities 6,004,596 127,866 (24,116) 6,108,346 Equity securities with a readily determinable fair value 19,629 — — 19,629 Total $ 6,024,225 $ 127,866 $ (24,116) $ 6,127,975 The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of June 30, 2021, and December 31, 2020, are summarized in the table below, in thousands: Amortized Gross Gross Estimated Allowance for Credit Losses June 30, 2021 Obligations of states and political subdivisions $ 85,490 $ 9,931 $ — $ 95,421 $ (51) Total $ 85,490 $ 9,931 $ — $ 95,421 $ (51) December 31, 2020 Obligations of states and political subdivisions $ 88,890 $ 11,151 $ — $ 100,041 $ (51) Total $ 88,890 $ 11,151 $ — $ 100,041 $ (51) As of June 30, 2021, and December 31, 2020, HTLF had $24.6 million and $20.8 million, respectively, of accrued interest receivable, which is included in other assets on the consolidated balance sheet. HTLF does not consider accrued interest receivable in the carrying amount of financial assets held at amortized cost basis or in the allowance for credit losses calculation. The amortized cost and estimated fair value of investment securities carried at fair value at June 30, 2021, by contractual maturity, are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties. June 30, 2021 Amortized Cost Estimated Fair Value Due in 1 year or less $ 13,286 $ 13,351 Due in 1 to 5 years 18,199 19,153 Due in 5 to 10 years 198,036 202,564 Due after 10 years 1,628,518 1,676,920 Total debt securities 1,858,039 1,911,988 Mortgage and asset-backed securities 4,584,993 4,611,339 Equity securities with a readily determinable fair value 20,651 20,651 Total investment securities $ 6,463,683 $ 6,543,978 The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2021, by contractual maturity, are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties. June 30, 2021 Amortized Cost Estimated Fair Value Due in 1 year or less $ 2,196 $ 2,209 Due in 1 to 5 years 42,172 44,028 Due in 5 to 10 years 32,451 37,240 Due after 10 years 8,671 11,944 Total debt securities 85,490 95,421 Allowance for credit losses (51) — Total investment securities $ 85,439 $ 95,421 As of June 30, 2021, and December 31, 2020, securities with a carrying value of $1.87 billion and $2.12 billion, respectively, were pledged to secure public and trust deposits, short-term borrowings and for other purposes as required or permitted by law. Gross gains and losses realized related to the sales of securities carried at fair value for the three and six months ended June 30, 2021 and 2020, are summarized as follows, in thousands: Three Months Ended Six Months Ended 2021 2020 2021 2020 Proceeds from sales $ 423,415 $ 182,749 $ 630,481 $ 511,639 Gross security gains 3,844 3,958 4,289 6,862 Gross security losses 1,002 1,952 1,477 3,198 The following table summarizes, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in the securities portfolio as of June 30, 2021, and December 31, 2020. The investments were segregated into two categories: those that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or more. The reference point for determining how long an investment was in an unrealized loss position w as June 30, 2020, and December 31, 2019 , respectively. Debt securities available for sale Less than 12 months 12 months or longer Total Fair Unrealized Count Fair Unrealized Count Fair Unrealized Count June 30, 2021 U.S. agencies 18,983 (492) 1 — — — 18,983 (492) 1 Obligations of states and political subdivisions 591,597 (11,887) 107 6,719 (72) 2 598,316 (11,959) 109 Mortgage-backed securities - agency 1,025,619 (19,499) 58 37,181 (1,105) 4 1,062,800 (20,604) 62 Mortgage-backed securities - non-agency 541,131 (1,345) 12 33,988 (430) 5 575,119 (1,775) 17 Commercial mortgage-backed securities - agency 69,690 (1,800) 11 — — — 69,690 (1,800) 11 Commercial mortgage-backed securities - non-agency — — — 15,960 (200) 2 15,960 (200) 2 Asset-backed securities 77,475 (319) 7 35,779 (810) 11 113,254 (1,129) 18 Corporate bonds — — — — — — — — — Total temporarily impaired securities $ 2,324,495 $ (35,342) 196 $ 129,627 $ (2,617) 24 $ 2,454,122 $ (37,959) 220 December 31, 2020 U.S. agencies 2,981 (8) 5 99,922 (918) 72 102,903 (926) 77 Obligations of states and political subdivisions 346,598 (2,959) 49 — — — 346,598 (2,959) 49 Mortgage-backed securities - agency 653,793 (12,342) 35 31,012 (381) 3 684,805 (12,723) 38 Mortgage-backed securities - non-agency 378,843 (1,639) 17 1,622 (1) 1 380,465 (1,640) 18 Commercial mortgage-backed securities - agency 46,541 (738) 6 — — — 46,541 (738) 6 Commercial mortgage-backed securities - non-agency 100,042 (15) 2 35,428 (676) 3 135,470 (691) 5 Asset-backed securities 141,824 (643) 9 340,452 (3,767) 24 482,276 (4,410) 33 Corporate bonds 1,908 (29) 4 — — — 1,908 (29) 4 Total temporarily impaired securities $ 1,672,530 $ (18,373) 127 $ 508,436 $ (5,743) 103 $ 2,180,966 $ (24,116) 230 HTLF had no securities held to maturity with unrealized losses at June 30, 2021, or December 31, 2020. HTLF reviews the investment securities portfolio at the security level on a quarterly basis for potential credit losses, which takes into consideration numerous factors, and the relative significance of any single factor can vary by security. Some factors HTLF may consider include changes in security ratings, financial condition of the issuer, as well as security and industry specific economic conditions. In addition, with regard to debt securities, HTLF may also evaluate payment structure, whether there are defaulted payments or expected defaults, prepayment speeds and the value of any underlying collateral. For certain debt securities in unrealized loss positions, HTLF prepares cash flow analyses to compare the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. The remaining unrealized losses on HTLF's mortgage and asset-backed securities are the result of changes in market interest rates or widening of market spreads subsequent to the initial purchase of the securities. The losses are not related to concerns regarding the underlying credit of the issuers or the underlying collateral. It is expected that the securities will not be settled at a price less than the amortized cost of the investment. Because the decline in fair value is attributable to changes in interest rates or widening market spreads and not credit quality, and because HTLF has the intent and ability to hold these investments until a market price recovery or to maturity and does not believe it will be required to sell the securities before maturity, no credit losses were recognized on these securities during the three and six months ended June 30, 2021 and 2020. The unrealized losses on HTLF's obligations of states and political subdivisions are the result of changes in market interest rates or widening of market spreads subsequent to the initial purchase of the securities. Management monitors the published credit ratings of these securities and the stability of the underlying municipalities. Because the decline in fair value is attributable to changes in interest rates or widening market spreads due to insurance company downgrades and not underlying credit quality, and because HTLF has the intent and ability to hold these investments until a market price recovery or to maturity and does not believe it will be required to sell the securities before maturity, no credit losses were recognized on these securities during the three and six months ended June 30, 2021 and 2020. The credit loss model under ASC 326-30, applicable to held to maturity debt securities, requires the recognition of lifetime expected credit losses through an allowance account at the time when the security is purchased. The following tables present, in thousands, the activity in the allowance for credit losses for securities held to maturity by obligations of states and political subdivisions securities for the three and six months ended June 30, 2021 and 2020: Three Months Ended 2021 2020 Beginning balance $ 48 $ 197 Provision (benefit) for credit losses 3 (135) Balance at period end $ 51 $ 62 Six Months Ended 2021 2020 Beginning balance $ 51 $ — Impact of ASU 2016-13 adoption — 158 Adjusted balance 51 158 Provision (benefit) for credit losses — (96) Balance at period end $ 51 $ 62 The following table summarizes, in thousands, the carrying amount of HTLF's held to maturity debt securities by investment rating as of June 30, 2021 and December 31, 2020, which are updated quarterly and used to monitor the credit quality of the securities: June 30, 2021 December 31, 2020 Rating AAA $ 3,207 $ — AA, AA+, AA- 62,526 64,385 A+, A, A- 15,006 18,353 BBB 4,751 4,208 Not Rated — 1,944 Total $ 85,490 $ 88,890 Included in other securities were shares of stock in each Federal Home Loan Bank (the "FHLB") of Des Moines, Chicago, Dallas, San Francisco and Topeka at an amortized cost of $20.8 million at June 30, 2021 and $19.5 million at December 31, 2020. The HTLF banks are required by federal law to maintain FHLB stock as members of the various FHLBs. These equity securities are "restricted" in that they can only be sold back to the respective institutions from which they were acquired or another member institution at par. Therefore, the FHLB stock is less liquid than other marketable equity securities, and the fair value approximates amortized cost. HTLF considers its FHLB stock as a long-term investment that provides access to competitive products and liquidity. HTLF evaluates impairment in these investments based on the ultimate recoverability of the par value and, at June 30, 2021, did not consider the investments to be impaired.

LOANS

LOANS	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
LOANS	LOANS Loans as of June 30, 2021, and December 31, 2020, were as follows, in thousands: June 30, 2021 December 31, 2020 Loans receivable held to maturity: Commercial and industrial $ 2,518,908 $ 2,534,799 Paycheck Protection Program ("PPP") 829,175 957,785 Owner occupied commercial real estate 1,940,134 1,776,406 Non-owner occupied commercial real estate 1,987,369 1,921,481 Real estate construction 854,295 863,220 Agricultural and agricultural real estate 679,608 714,526 Residential real estate 800,884 840,442 Consumer 401,641 414,392 Total loans receivable held to maturity 10,012,014 10,023,051 Allowance for credit losses (120,726) (131,606) Loans receivable, net $ 9,891,288 $ 9,891,445 As of June 30, 2021, and December 31, 2020, HTLF had $37.7 million and $42.4 million, respectively, of accrued interest receivable, which is included in other assets on the consolidated balance sheet. HTLF does not consider accrued interest receivable in the allowance for credit losses calculation. The following table shows the balance in the allowance for credit losses at June 30, 2021, and December 31, 2020, and the related loan balances, disaggregated on the basis of measurement methodology, in thousands. If a loan no longer shares similar risk characteristics with other loans in the pool, it is evaluated on an individual basis and is not included in the collective evaluation. Lending relationships with $500,000 or more of total exposure and are on nonaccrual are individually assessed using a collateral dependency calculation. All other loans are collectively evaluated for losses. Allowance For Credit Losses Gross Loans Receivable Held to Maturity Individually Evaluated for Credit Losses Collectively Evaluated for Credit Losses Total Loans Individually Evaluated for Credit Losses Loans Collectively Evaluated for Credit Losses Total June 30, 2021 Commercial and industrial $ 4,688 $ 26,644 $ 31,332 $ 13,658 $ 2,505,250 $ 2,518,908 PPP — — — — 829,175 829,175 Owner occupied commercial real estate 110 19,880 19,990 7,547 1,932,587 1,940,134 Non-owner occupied commercial real estate 3,485 19,343 22,828 19,548 1,967,821 1,987,369 Real estate construction — 19,580 19,580 — 854,295 854,295 Agricultural and agricultural real estate 3,106 4,054 7,160 17,948 661,660 679,608 Residential real estate — 9,741 9,741 — 800,884 800,884 Consumer — 10,095 10,095 — 401,641 401,641 Total $ 11,389 $ 109,337 $ 120,726 $ 58,701 $ 9,953,313 $ 10,012,014 Allowance For Credit Losses Gross Loans Receivable Held to Maturity Individually Evaluated for Credit Losses Collectively Evaluated for Credit Losses Total Loans Individually Evaluated for Credit Losses Loans Collectively Evaluated for Credit Losses Total December 31, 2020 Commercial and industrial $ 4,077 $ 34,741 $ 38,818 $ 16,578 $ 2,518,221 $ 2,534,799 PPP — — — — 957,785 957,785 Owner occupied commercial real estate 111 19,890 20,001 11,174 1,765,232 1,776,406 Non-owner occupied commercial real estate 3,250 17,623 20,873 13,490 1,907,991 1,921,481 Real estate construction — 20,080 20,080 — 863,220 863,220 Agricultural and agricultural real estate 1,988 5,141 7,129 15,453 699,073 714,526 Residential real estate — 11,935 11,935 535 839,907 840,442 Consumer — 12,770 12,770 — 414,392 414,392 Total $ 9,426 $ 122,180 $ 131,606 $ 57,230 $ 9,965,821 $ 10,023,051 HTLF had $13.7 million of troubled debt restructured loans at June 30, 2021, of which $11.6 million were classified as nonaccrual and $2.1 million were accruing according to the restructured terms. HTLF had $6.2 million of troubled debt restructured loans at December 31, 2020, of which $3.8 million were classified as nonaccrual and $2.4 million were accruing according to the restructured terms. The following tables provide information on troubled debt restructured loans that were modified during the three- and six- months ended June 30, 2021, and June 30, 2020, dollars in thousands: Three Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Commercial — $ — $ — — $ — $ — PPP — — — — — — Owner occupied commercial real estate — — — — — — Non-owner occupied commercial real estate 2 7,850 7,850 — — — Real estate construction — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate — — — 1 60 66 Consumer — — — — — — Total 2 $ 7,850 $ 7,850 1 $ 60 $ 66 Six Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Commercial and industrial — $ — $ — — $ — $ — PPP — — — — — — Owner occupied commercial real estate — — — — — — Non-owner occupied commercial real estate 2 7,850 7,850 — — — Real estate construction — — — — — — Agricultural and agricultural real estate — — — — — — Six Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Residential real estate — — — 2 92 98 Consumer — — — — — — Total 2 $ 7,850 $ 7,850 2 $ 92 $ 98 At June 30, 2021, there were no commitments to extend credit to any of the borrowers with an existing troubled debt restructured loan. The tables above do not include any loan modifications made under COVID-19 modification programs. There were no troubled debt restructured loans for which there was a payment default during the three- and six- months ended June 30, 2021, and June 30, 2020, that had been modified during the twelve-month period prior to default. HTLF's internal rating system is a series of grades reflecting management's risk assessment, based on its analysis of the borrower's financial condition. The "pass" category consists of all loans that are not in the "nonpass" category and categorized into a range of loan grades that reflect increasing, though still acceptable, risk. Movement of risk through the various grade levels in the pass category is monitored for early identification of credit deterioration. The "nonpass" category consists of watch, substandard, doubtful and loss loans. The "watch" rating is attached to loans where the borrower exhibits negative trends in financial circumstances due to borrower specific or systemic conditions that, if left uncorrected, threaten the borrower's capacity to meet its debt obligations. The borrower is believed to have sufficient financial flexibility to react to and resolve its negative financial situation. These credits are closely monitored for improvement or deterioration. The "substandard" rating is assigned to loans that are inadequately protected by the current net worth and repaying capacity of the borrower and that may be further at risk due to deterioration in the value of collateral pledged. Well-defined weaknesses jeopardize liquidation of the debt. These loans are still considered collectible; however, a distinct possibility exists that HTLF will sustain some loss if deficiencies are not corrected. Substandard loans may exhibit some or all of the following weaknesses: deteriorating financial trends, lack of earnings, inadequate debt service capacity, excessive debt and/or lack of liquidity. The "doubtful" rating is assigned to loans where identified weaknesses in the borrowers' ability to repay the loan make collection or liquidation in full, on the basis of existing facts, conditions and values, highly questionable and improbable. These borrowers are usually in default, lack liquidity and capital, as well as resources necessary to remain as an operating entity. Specific pending events, such as capital injections, liquidations or perfection of liens on additional collateral, may strengthen the credit, thus deferring the rating of the loan as "loss" until the exact status of the loan can be determined. The loss rating is assigned to loans considered uncollectible. HTLF had no loans classified as loss or doubtful as of June 30, 2021, and December 31, 2020. The following tables show the risk category of loans by loan category and year of origination as of June 30, 2021, and December 31, 2020, in thousands: As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total Commercial and industrial Pass $ 330,626 $ 475,749 $ 277,874 $ 122,550 $ 197,617 $ 370,896 $ 528,785 $ 2,304,097 Watch 7,252 13,154 22,947 12,886 8,633 17,574 35,506 117,952 Substandard 2,171 21,377 10,899 8,780 11,706 21,646 20,280 96,859 Commercial and industrial total $ 340,049 $ 510,280 $ 311,720 $ 144,216 $ 217,956 $ 410,116 $ 584,571 $ 2,518,908 As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total PPP Pass $ 409,922 $ 327,475 $ — $ — $ — $ — $ — $ 737,397 Watch 21,880 28,769 — — — — — 50,649 Substandard 20,697 20,432 — — — — — 41,129 PPP total $ 452,499 $ 376,676 $ — $ — $ — $ — $ — $ 829,175 Owner occupied commercial real estate Pass $ 331,097 $ 402,216 $ 371,104 $ 232,062 $ 143,692 $ 264,190 $ 27,773 $ 1,772,134 Watch 428 17,998 14,979 18,715 19,869 10,305 2,250 84,544 Substandard 743 18,083 13,464 7,908 13,903 28,201 1,154 83,456 Owner occupied commercial real estate total $ 332,268 $ 438,297 $ 399,547 $ 258,685 $ 177,464 $ 302,696 $ 31,177 $ 1,940,134 Non-owner occupied commercial real estate Pass $ 206,934 $ 332,479 $ 355,445 $ 275,853 $ 163,047 $ 266,547 $ 32,340 $ 1,632,645 Watch 16,873 18,884 76,447 30,786 8,233 53,339 4,524 209,086 Substandard 16,968 13,315 20,879 23,329 24,802 46,035 310 145,638 Non-owner occupied commercial real estate total $ 240,775 $ 364,678 $ 452,771 $ 329,968 $ 196,082 $ 365,921 $ 37,174 $ 1,987,369 Real estate construction Pass $ 151,473 $ 338,101 $ 215,455 $ 49,360 $ 10,003 $ 8,959 $ 17,078 $ 790,429 Watch — 1,865 11,474 47,460 240 210 413 61,662 Substandard — — 28 1,993 — 183 — 2,204 Real estate construction total $ 151,473 $ 339,966 $ 226,957 $ 98,813 $ 10,243 $ 9,352 $ 17,491 $ 854,295 Agricultural and agricultural real estate Pass $ 115,287 $ 125,764 $ 79,157 $ 46,698 $ 28,105 $ 43,350 $ 134,975 $ 573,336 Watch 3,480 13,591 5,746 2,197 256 3,735 4,735 33,740 Substandard 9,082 8,793 6,886 20,498 5,641 11,210 10,422 72,532 Agricultural and agricultural real estate total $ 127,849 $ 148,148 $ 91,789 $ 69,393 $ 34,002 $ 58,295 $ 150,132 $ 679,608 Residential real estate Pass $ 144,046 $ 116,571 $ 65,840 $ 82,530 $ 56,628 $ 277,236 $ 28,244 $ 771,095 Watch 1,236 1,966 1,634 1,703 2,039 6,998 — 15,576 Substandard 4,147 859 299 1,889 1,259 5,760 — 14,213 Residential real estate total $ 149,429 $ 119,396 $ 67,773 $ 86,122 $ 59,926 $ 289,994 $ 28,244 $ 800,884 Consumer Pass $ 39,485 $ 26,718 $ 20,157 $ 13,147 $ 12,112 $ 21,088 $ 259,705 $ 392,412 Watch 4 132 220 1,362 130 508 1,234 3,590 Substandard 848 432 612 474 371 2,104 798 5,639 Consumer total $ 40,337 $ 27,282 $ 20,989 $ 14,983 $ 12,613 $ 23,700 $ 261,737 $ 401,641 Total Pass $ 1,728,870 $ 2,145,073 $ 1,385,032 $ 822,200 $ 611,204 $ 1,252,266 $ 1,028,900 $ 8,973,545 Total Watch 51,153 96,359 133,447 115,109 39,400 92,669 48,662 576,799 Total Substandard 54,656 83,291 53,067 64,871 57,682 115,139 32,964 461,670 Total Loans $ 1,834,679 $ 2,324,723 $ 1,571,546 $ 1,002,180 $ 708,286 $ 1,460,074 $ 1,110,526 $ 10,012,014 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Commercial and industrial Pass $ 557,853 $ 340,809 $ 168,873 $ 215,696 $ 101,010 $ 337,834 $ 541,627 $ 2,263,702 Watch 41,574 24,676 19,672 14,262 8,072 2,474 49,432 160,162 Substandard 23,024 16,274 8,897 15,717 9,098 19,537 18,388 110,935 Commercial and industrial total $ 622,451 $ 381,759 $ 197,442 $ 245,675 $ 118,180 $ 359,845 $ 609,447 $ 2,534,799 PPP Pass $ 880,709 $ — $ — $ — $ — $ — $ — $ 880,709 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Watch 22,533 — — — — — — 22,533 Substandard 54,543 — — — — — — 54,543 PPP total $ 957,785 $ — $ — $ — $ — $ — $ — $ 957,785 Owner occupied commercial real estate Pass $ 400,662 $ 369,401 $ 300,242 $ 167,470 $ 107,234 $ 213,780 $ 33,759 $ 1,592,548 Watch 15,345 13,764 22,488 20,811 8,717 15,282 4,311 100,718 Substandard 15,914 9,522 12,164 14,147 8,580 21,708 1,105 83,140 Owner occupied commercial real estate total $ 431,921 $ 392,687 $ 334,894 $ 202,428 $ 124,531 $ 250,770 $ 39,175 $ 1,776,406 Non-owner occupied commercial real estate Pass $ 334,722 $ 411,301 $ 305,456 $ 194,101 $ 108,070 $ 233,153 $ 24,466 $ 1,611,269 Watch 22,826 55,225 24,718 18,724 20,954 45,672 5,114 193,233 Substandard 30,899 15,035 23,290 17,046 9,147 21,060 502 116,979 Non-owner occupied commercial real estate total $ 388,447 $ 481,561 $ 353,464 $ 229,871 $ 138,171 $ 299,885 $ 30,082 $ 1,921,481 Real estate construction Pass $ 311,625 $ 309,678 $ 157,171 $ 12,625 $ 6,954 $ 5,110 $ 21,431 $ 824,594 Watch 2,105 26,659 2,403 332 55 388 1,295 33,237 Substandard 196 2,760 2,036 — 39 358 — 5,389 Real estate construction total $ 313,926 $ 339,097 $ 161,610 $ 12,957 $ 7,048 $ 5,856 $ 22,726 $ 863,220 Agricultural and agricultural real estate Pass $ 171,578 $ 90,944 $ 62,349 $ 39,252 $ 17,626 $ 37,696 $ 148,456 $ 567,901 Watch 20,500 16,202 8,854 2,448 3,515 3,157 12,282 66,958 Substandard 17,403 7,044 23,519 6,758 3,917 9,952 11,074 79,667 Agricultural and agricultural real estate total $ 209,481 $ 114,190 $ 94,722 $ 48,458 $ 25,058 $ 50,805 $ 171,812 $ 714,526 Residential real estate Pass $ 153,017 $ 99,440 $ 118,854 $ 83,534 $ 63,477 $ 244,852 $ 33,467 $ 796,641 Watch 3,986 4,507 2,188 1,896 3,117 8,525 — 24,219 Substandard 980 442 2,507 1,528 884 12,141 1,100 19,582 Residential real estate total $ 157,983 $ 104,389 $ 123,549 $ 86,958 $ 67,478 $ 265,518 $ 34,567 $ 840,442 Consumer Pass $ 37,037 $ 27,646 $ 18,811 $ 15,034 $ 4,009 $ 19,483 $ 280,996 $ 403,016 Watch 168 352 647 340 82 646 1,622 3,857 Substandard 481 959 1,884 500 897 1,976 822 7,519 Consumer total $ 37,686 $ 28,957 $ 21,342 $ 15,874 $ 4,988 $ 22,105 $ 283,440 $ 414,392 Total Pass $ 2,847,203 $ 1,649,219 $ 1,131,756 $ 727,712 $ 408,380 $ 1,091,908 $ 1,084,202 $ 8,940,380 Total Watch 129,037 141,385 80,970 58,813 44,512 76,144 74,056 604,917 Total Substandard 143,440 52,036 74,297 55,696 32,562 86,732 32,991 477,754 Total Loans $ 3,119,680 $ 1,842,640 $ 1,287,023 $ 842,221 $ 485,454 $ 1,254,784 $ 1,191,249 $ 10,023,051 Included in the nonpass loans at June 30, 2021 and December 31, 2020 were $91.8 million and $77.1 million, respectively, of nonpass PPP loans as a result of risk ratings on non-PPP related credits. HTLF's risk rating methodology assigns a risk rating to the whole lending relationship. HTLF has no allowance recorded related to the PPP loans because of the 100% government guarantee. As of June 30, 2021, HTLF had $1.7 million of loans secured by residential real estate property that were in the process of foreclosure. The following table sets forth information regarding accruing and nonaccrual loans at June 30, 2021, and December 31, 2020, in thousands: Accruing Loans 30-59 60-89 90 Days or Total Current Nonaccrual Total Loans June 30, 2021 Commercial and industrial $ 1,537 $ 1,034 $ 12 $ 2,583 $ 2,498,207 $ 18,118 $ 2,518,908 PPP — — — — 829,175 — 829,175 Owner occupied commercial real estate 1,134 — — 1,134 1,929,086 9,914 1,940,134 Non-owner occupied commercial real estate 1,374 1,350 — 2,724 1,963,775 20,870 1,987,369 Real estate construction 2,834 — — 2,834 851,053 408 854,295 Agricultural and agricultural real estate 2,759 1,716 — 4,475 654,135 20,998 679,608 Residential real estate 2,192 118 85 2,395 785,637 12,852 800,884 Consumer 679 222 — 901 398,632 2,108 401,641 Total gross loans receivable held to maturity $ 12,509 $ 4,440 $ 97 $ 17,046 $ 9,909,700 $ 85,268 $ 10,012,014 December 31, 2020 Commercial and industrial $ 5,825 $ 2,322 $ 720 $ 8,867 $ 2,504,170 $ 21,762 $ 2,534,799 PPP 1 — — 1 957,784 — 957,785 Owner occupied commercial real estate 2,815 167 — 2,982 1,759,649 13,775 1,776,406 Non-owner occupied commercial real estate 2,143 2,674 — 4,817 1,902,003 14,661 1,921,481 Real estate construction 2,446 96 — 2,542 859,784 894 863,220 Agricultural and agricultural real estate 1,688 — — 1,688 694,150 18,688 714,526 Residential real estate 1,675 83 — 1,758 825,047 13,637 840,442 Consumer 807 139 — 946 409,477 3,969 414,392 Total gross loans receivable held to maturity $ 17,400 $ 5,481 $ 720 $ 23,601 $ 9,912,064 $ 87,386 $ 10,023,051 Loans delinquent 30 to 89 days as a percent of total loans were 0.17% at June 30, 2021, compared to 0.23% at December 31, 2020. Changes in credit risk are monitored on a continuous basis as part of relationship management, and changes in risk ratings are made when identified. All individually assessed loans are reviewed at least annually. HTLF recognized $0 of interest income on nonaccrual loans during the three and six months ended June 30, 2021 and June 30, 2020. As of June 30, 2021, and December 31, 2020, HTLF had $24.0 million and $32.5 million of nonaccrual loans with no related allowance, respectively. On December 4, 2020, HTLF's Arizona Bank & Trust subsidiary completed the acquisition of certain assets and substantially all of the deposits and certain other liabilities of Johnson Bank's Arizona operations, headquartered in Racine, Wisconsin. As of December 4, 2020, the Johnson Bank branches acquired had gross loans with a fair value of $150.7 million. On December 4, 2020, HTLF completed the acquisition of AimBank, headquartered in Levelland, Texas. As of December 4, 2020, AimBank had gross loans with a fair value of $1.09 billion.

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	6 Months Ended
	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
ALLOWANCE FOR CREDIT LOSSES	ALLOWANCE FOR CREDIT LOSSES Changes in the allowance for credit losses on loans for the three- and six- months ended June 30, 2021, and June 30, 2020, were as follows, in thousands: Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Agricultural and Agricultural Real Estate Residential Consumer Total Balance at March 31, 2021 $ 36,095 $ — $ 19,416 $ 24,694 $ 19,931 $ 7,111 $ 11,012 $ 11,913 $ 130,172 Charge-offs (842) — (72) (1,637) (10) (357) (70) (509) (3,497) Recoveries 265 — 44 13 4 — — 191 517 Provision (4,186) — 602 (242) (345) 406 (1,201) (1,500) (6,466) Balance at June 30, 2021 $ 31,332 $ — $ 19,990 $ 22,828 $ 19,580 $ 7,160 $ 9,741 $ 10,095 $ 120,726 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Residential Consumer Total Balance at December 31, 2020 $ 38,818 $ — $ 20,001 $ 20,873 $ 20,080 $ 7,129 $ 11,935 $ 12,770 $ 131,606 Charge-offs (1,790) — (113) (1,637) (10) (675) (91) (1,307) (5,623) Recoveries 558 — 97 13 6 21 5 493 1,193 Provision (6,254) — 5 3,579 (496) 685 (2,108) (1,861) (6,450) Balance at June 30, 2021 $ 31,332 $ — $ 19,990 $ 22,828 $ 19,580 $ 7,160 $ 9,741 $ 10,095 $ 120,726 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Real Estate Residential Consumer Total Balance at March 31, 2020 $ 32,455 — 10,337 8,320 22,951 $ 4,797 $ 8,725 $ 9,765 $ 97,350 Charge-offs (2,536) — (213) (19) (84) (1) (235) (476) (3,564) Recoveries 345 — 191 8 210 — 92 298 1,144 Provision 2,254 — 13,087 1,852 5,590 905 722 597 25,007 Balance at June 30, 2020 $ 32,518 $ 32,531 $ — $ 23,402 $ 10,161 $ 28,667 $ 5,701 $ 9,304 $ 10,184 $ 119,937 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Residential Consumer Total Balance at December 31, 2019 $ 34,207 $ — $ 7,921 $ 7,584 $ 8,677 $ 5,680 $ 1,504 $ 4,822 $ 70,395 Impact of ASU 2016-13 adoption (272) — (114) (2,617) 6,335 (387) 4,817 4,309 12,071 Adjusted balance at January 1, 2020 33,935 — 7,807 4,967 15,012 5,293 6,321 9,131 82,466 Charge-offs (7,767) — (213) (19) (105) (254) (314) (1,193) (9,865) Recoveries 610 — 192 8 215 826 95 518 2,464 Provision 5,740 — 15,616 5,205 13,545 (164) 3,202 1,728 44,872 Balance at June 30, 2020 $ 32,518 $ — $ 23,402 $ 10,161 $ 28,667 $ 5,701 $ 9,304 $ 10,184 $ 119,937 Management allocates the allowance for credit losses by pools of risk within each loan portfolio. The allocation of the allowance for credit losses by loan portfolio is made for analytical purposes and is not necessarily indicative of the trend of future loan losses in any particular category. The total allowance for credit losses is available to absorb losses from any segment of the loan portfolio. Changes in the allowance for credit losses on unfunded commitments for the three and six months ended June 30, 2021 and June 30, 2020, were as follows: For the Three Months Ended June 30, 2021 2020 Balance at March 31, $ 14,619 $ 15,468 Provision (617) 1,924 Balance at June 30, $ 14,002 $ 17,392 For the Six Months Ended June 30, 2021 2020 Balance at December 31, $ 15,280 $ 248 Impact of ASU 2016-13 adoption on January 1, 2020 — 13,604 Adjusted balance at January 1, 15,280 13,852 Provision (1,278) 3,540 Balance at June 30, $ 14,002 $ 17,392

GOODWILL, CORE DEPOSIT PREMIUM

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS	GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS HTLF had goodwill of $576.0 million at both June 30, 2021 and December 31, 2020. HTLF conducts its annual internal assessment of the goodwill both at the consolidated level and at its subsidiaries as of September 30. Due to the COVID-19 pandemic and economic conditions, HTLF performed an interim quantitative assessment of goodwill in the second quarter of 2020, which was the most recent annual assessment, and there was no goodwill impairment. HTLF recorded $91.4 million of goodwill and $3.1 million of core deposit intangible in connection with the acquisition of AimBank, headquartered in Levelland, Texas on December 4, 2020. HTLF recorded $38.4 million of goodwill and $1.3 million of core deposit intangible in connection with the acquisition of certain assets and substantially all of the deposits and certain other liabilities of Johnson Bank's Arizona operations, headquartered in Racine, Wisconsin, on December 4, 2020. The core deposit intangible recorded with the AimBank acquisition is not deductible for tax purposes and is expected to be amortized over a period of 10 years on an accelerated basis. Goodwill related to the AimBank acquisition resulted from expected operational synergies, increased market presence, cross-selling opportunities, and expanded business lines and is not deductible for tax purposes. The core deposit intangible and goodwill recorded with the Johnson Bank transaction are deductible for tax purposes, and the core deposit intangible is expected to be amortized over a period of 10 years on an accelerated basis. HTLF's intangible assets consist of core deposit intangibles, mortgage servicing rights, customer relationship intangibles, and commercial servicing rights. The gross carrying amount of these intangible assets and the associated accumulated amortization at June 30, 2021, and December 31, 2020, are presented in the table below, in thousands: June 30, 2021 December 31, 2020 Gross Accumulated Net Gross Accumulated Net Amortizing intangible assets: Core deposit intangibles $ 101,185 $ 63,883 $ 37,302 $ 101,185 $ 58,970 $ 42,215 Customer relationship intangibles 1,177 1,027 150 1,177 1,009 168 Mortgage servicing rights 11,971 6,412 5,559 11,268 6,079 5,189 Commercial servicing rights 7,054 6,412 642 7,054 6,191 863 Total $ 121,387 $ 77,734 $ 43,653 $ 120,684 $ 72,249 $ 48,435 The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands: Core Customer Mortgage Commercial Six months ending December 31, 2021 $ 4,446 $ 18 $ 648 $ 110 $ 5,222 Year ending December 31, 2022 7,702 34 1,228 194 9,158 2023 6,739 33 1,052 139 7,963 2024 5,591 33 877 96 6,597 2025 4,700 32 702 103 5,537 2026 3,533 — 526 — 4,059 Thereafter 4,591 — 526 — 5,117 Total $ 37,302 $ 150 $ 5,559 $ 642 $ 43,653 Projections of amortization expense for mortgage servicing rights are based on existing asset balances and the existing interest rate environment as of June 30, 2021. HTLF's actual experience may be significantly different depending upon changes in mortgage interest rates and market conditions. Mortgage loans serviced for others were approximately $719.6 million at June 30, 2021, compared to $743.3 million at December 31, 2020. Custodial escrow balances maintained in connection with the mortgage loan servicing portfolio were approximately $13.1 million at June 30, 2021, and $5.7 million at December 31, 2020. At June 30, 2021, the fair value of the mortgage servicing rights was estimated at $5.6 million compared to $5.2 million at December 31, 2020. The fair value of mortgage servicing rights is calculated based upon a discounted cash flow analysis. Cash flow assumptions, including prepayment speeds, servicing costs and escrow earnings of the mortgage servicing rights are considered in the calculation. The average constant prepayment rate was 15.90% for the June 30, 2021, valuation compared to 16.20% for the December 31, 2020 valuation. The discount rate was 9.02% for both June 30, 2021, and December 31, 2020. The average capitalization rate for the first six months of 2021 ranged from 79 to 120 basis points compared to a range of 76 to 116 basis points for the first six months of 2020. Fees collected for the servicing of mortgage loans for others were $459,000 and $410,000 for the quarters ended June 30, 2021 and June 30, 2020, respectively. Fees collected for the servicing of mortgage loans for others were $923,000 and $819,000 for the six months ended June 30, 2021 and 2020, respectively. The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2021, and June 30, 2020: 2021 2020 Balance at January 1, $ 5,189 $ 5,621 Originations 703 1,490 Amortization (724) (1,070) Valuation adjustment 391 (1,556) Balance at period end $ 5,559 $ 4,485 Mortgage servicing rights, net to servicing portfolio 0.77 % 0.68 % HTLF's commercial servicing portfolio is comprised of loans guaranteed by the United States Small Business Administration ("SBA") and United States Department of Agriculture that have been sold with servicing retained by HTLF, which totaled $57.5 million at June 30, 2021 and $66.2 million at December 31, 2020. The commercial servicing rights portfolio is separated into two tranches at the respective HTLF subsidiary, loans with a term of less than 20 years and loans with a term of more than 20 years. Fees collected for the servicing of commercial loans for others were $165,000 and $54,000 for the quarters ended June 30, 2021 and June 30, 2020, respectively, and $294,000 and $172,000 for the six months ended June 30, 2021 and June 30, 2020, respectively. The fair value of each commercial servicing rights portfolio is calculated based upon a discounted cash flow analysis. Cash flow assumptions, including prepayment speeds and servicing costs, are considered in the calculation. The range of average constant prepayment rates for the valuations was 13.70% to 17.49% as of June 30, 2021 compared to 14.95% to 19.25% as of December 31, 2020. The discount rate range was 5.70% to 9.96% for the June 30, 2021, valuations compared to 7.70% to 12.88% for the December 31, 2020 valuations. The capitalization rate for 2020 ranged from 310 to 445 basis points. The total fair value of the commercial servicing rights was estimated at $1.1 million as of June 30, 2021, and $1.3 million as of December 31, 2020. The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the six months ended June 30, 2021, and June 30, 2020: 2021 2020 Balance at January 1, $ 863 $ 1,115 Originations — 38 Amortization (221) (169) Balance at period end $ 642 $ 984 Fair value of commercial servicing rights $ 1,104 $ 1,417 Commercial servicing rights, net to servicing portfolio 1.12 % 1.32 % Mortgage and commercial servicing rights are initially recorded at fair value in net gains on sale of loans held for sale when they are capitalized through loan sales. Fair value is based on market prices for comparable servicing contracts, when available, or based on a valuation model that calculates the present value of estimated future net servicing income. Mortgage and commercial servicing rights are subsequently measured using the amortization method, which requires the asset to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing rights are evaluated for impairment at each HTLF subsidiary based upon the fair value of the assets as compared to the carrying amount. Impairment is recognized through a valuation allowance for specific tranches to the extent that fair value is less than the carrying amount at each HTLF subsidiary. At June 30, 2021, a $470,000 valuation allowance was required on the mortgage servicing rights 15-year tranche and a $1.9 million valuation allowance was required on the mortgage servicing rights 30-year tranche. At December 31, 2020, a $422,000 valuation allowance was required on the mortgage servicing rights 15-year tranche and a $1.4 million valuation allowance was required on the mortgage servicing rights 30-year tranche. At both June 30, 2021 and December 31, 2020, no valuation allowance was required on commercial servicing rights with a term less than 20 years and no valuation allowance was required on commercial servicing rights with a term greater than 20 years. The following table summarizes, in thousands, the book value, the fair value of each tranche of the mortgage servicing rights and any recorded valuation allowance at June 30, 2021, and December 31, 2020: Book Value 15-Year Tranche Fair Value 15-Year Tranche Valuation Allowance Book Value 30-Year Tranche Fair Value 30-Year Tranche Valuation Allowance June 30, 2021 $ 1,627 $ 1,157 $ 470 $ 6,287 $ 4,402 $ 1,885 December 31, 2020 $ 1,522 $ 1,100 $ 422 $ 5,445 $ 4,089 $ 1,356 The following table summarizes, in thousands, the book value, the fair value of each tranche of the commercial servicing rights and any recorded valuation allowance at June 30, 2021, and December 31, 2020: Book Value Fair Value Valuation Allowance Book Value Fair Value Valuation Allowance June 30, 2021 $ 58 $ 170 $ — $ 584 $ 934 $ — December 31, 2020 $ 87 $ 203 $ — $ 776 $ 1,085 $ —

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS HTLF uses derivative financial instruments as part of its interest rate risk management strategy. As part of the strategy, HTLF considers the use of interest rate swaps, caps, floors, collars, and certain interest rate lock commitments and forward sales of securities related to mortgage banking activities. HTLF's current strategy includes the use of interest rate swaps, interest rate lock commitments and forward sales of mortgage securities. In addition, HTLF is facilitating back-to-back loan swaps to assist customers in managing interest rate risk. HTLF's objectives are to add stability to its net interest margin and to manage its exposure to movements in interest rates. The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. HTLF is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. HTLF minimizes this risk by entering into derivative contracts with counterparties that meet HTLF’s credit standards, and the contracts contain collateral provisions protecting the at-risk party. HTLF has not experienced any losses from nonperformance by these counterparties. HTLF monitors counterparty risk in accordance with the provisions of ASC 815. In addition, interest rate-related derivative instruments generally contain language outlining collateral pledging requirements for each counterparty. Collateral must be posted when the market value exceeds certain threshold limits which are determined by credit ratings of each counterparty. HTLF was required to pledge $2.9 million of cash as collateral at June 30, 2021 compared to $3.8 million at December 31, 2020. At both June 30, 2021 and December 31, 2020, no collateral was required to be pledged by HTLF's counterparties. HTLF's derivative and hedging instruments are recorded at fair value on the consolidated balance sheets. See Note 8, “Fair Value,” for additional fair value information and disclosures. Cash Flow Hedges HTLF has variable rate funding which creates exposure to variability in interest payments due to changes in interest rates. To manage the interest rate risk related to the variability of interest payments, HTLF has entered into various interest rate swap agreements. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are received or made on HTLF's variable-rate liabilities. For the six months ended June 30, 2021, the change in net unrealized losses on cash flow hedges reflects changes in the fair value of the swaps and reclassification from accumulated other comprehensive income to interest expense totaling $1.8 million. For the next twelve months, HTLF estimates that cash payments and reclassification from accumulated other comprehensive income to interest expense will total $2.4 million. HTLF entered into forward starting interest rate swap transactions to effectively convert Heartland Financial Statutory Trust VI and VII, which total $40.0 million, from variable rate subordinated debentures to fixed rate debt. For accounting purposes, these swap transactions are designated as cash flow hedges of the changes in LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on $40.0 million of HTLF's subordinated debentures that reset quarterly on a specified reset date. At inception, HTLF asserted that the underlying principal balance would remain outstanding throughout the hedge transaction, making it probable that sufficient LIBOR-based interest payments would exist through the maturity date of the swaps. During the first quarter of 2021, the interest rate swap transaction associated with Heartland Financial Statutory Trust IV, totaling $25.0 million, matured and the fixed rate debt has been converted to a variable rate subordinated debenture. On May 18, 2018, HTLF acquired cash flow hedges related to OCGI Statutory Trust III and OCGI Capital Trust IV with notional amounts of $3.0 million and $6.0 million, respectively, in the First Bank Lubbock Bancshares, Inc. transaction. The cash flow hedges effectively convert OCGI Statutory Trust III and OGCI Capital Trust IV from variable rate subordinated debentures to fixed rate debt. These swaps are designated as cash flow hedges of the changes in LIBOR, the benchmark interest rate being hedged, associated with the interest payments made on $9.0 million of HTLF's subordinated debentures that reset quarterly on a specified reset date. These swaps matured in June of 2021. The table below identifies the balance sheet category and fair values of HTLF's derivative instruments designated as cash flow hedges at June 30, 2021, and December 31, 2020, in thousands: Notional Fair Balance Receive Weighted Maturity June 30, 2021 Interest rate swap $ 21,250 $ (1,636) Other liabilities 2.591 % 5.425 % 07/24/2028 Interest rate swap 20,000 (1,107) Other liabilities 0.119 2.390 06/15/2024 Interest rate swap 20,000 (1,049) Other liabilities 0.135 2.352 03/01/2024 December 31, 2020 Interest rate swap $ 25,000 $ (127) Other liabilities 0.229 % 2.255 % 03/17/2021 Interest rate swap 21,667 (91) Other liabilities 2.649 3.674 05/10/2021 Interest rate swap 22,750 (2,220) Other liabilities 2.643 5.425 07/24/2028 Interest rate swap 20,000 (1,482) Other liabilities 0.217 2.390 06/15/2024 Interest rate swap 20,000 (1,385) Other liabilities 0.225 2.352 03/01/2024 Interest rate swap 6,000 (50) Other liabilities 0.217 1.866 06/15/2021 Interest rate swap 3,000 (25) Other liabilities 0.241 1.878 06/30/2021 The table below identifies the gains and losses recognized on HTLF's derivative instruments designated as cash flow hedges for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Effective Portion Ineffective Portion Recognized in OCI Reclassified from AOCI into Income Recognized in Income on Derivatives Amount of Category Amount of Category Amount of Three Months Ended June 30, 2021 Interest rate swaps $ 291 Interest expense $ 454 Other income $ — Six Months Ended June 30, 2021 Interest rate swaps $ 1,588 Interest expense $ 1,045 Other income $ — Three Months Ended June 30, 2020 Interest rate swap $ (100) Interest Expense $ 417 Other Income $ — Six Months Ended June 30, 2020 Interest rate swap $ (3,963) Interest Expense $ 600 Other Income $ — Fair Value Hedges HTLF uses interest rate swaps to convert certain long term fixed rate loans to floating rates to hedge interest rate risk exposure. HTLF uses hedge accounting in accordance with ASC 815, with the unrealized gains and losses, representing the change in fair value of the derivative and the change in fair value of the risk being hedged on the related loan, being recorded in the consolidated statements of income. The ineffective portions of the unrealized gains or losses, if any, are recorded in interest income and interest expense in the consolidated statements of income. HTLF uses statistical regression to assess hedge effectiveness, both at the inception of the hedge as well as on a continual basis. The regression analysis involves regressing the periodic change in the fair value of the hedging instrument against the periodic changes in the fair value of the asset being hedged due to changes in the hedge risk. HTLF was required to pledge $3.8 million and $4.2 million of cash as collateral for these fair value hedges at June 30, 2021, and December 31, 2020, respectively. The table below identifies the notional amount, fair value and balance sheet category of HTLF's fair value hedges at June 30, 2021, and December 31, 2020, in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2021 Fair value hedges $ 16,901 $ (1,585) Other liabilities December 31, 2020 Fair value hedges $ 20,841 $ (2,480) Other liabilities The table below identifies the gains and losses recognized on HTLF's fair value hedges for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2021 Fair value hedges $ 132 Interest income Six Months Ended June 30, 2021 Fair value hedges $ 895 Interest income Three Months Ended June 30, 2020 Fair value hedges $ 4 Interest income Six Months Ended June 30, 2020 Fair value hedges $ (1,673) Interest income Embedded Derivatives HTLF has fixed rate loans with embedded derivatives. The loans contain terms that affect the cash flows or value of the loan similar to a derivative instrument, and therefore are considered to contain an embedded derivative. The embedded derivatives are bifurcated from the loans because the terms of the derivative instrument are not clearly and closely related to the loans. The embedded derivatives are recorded at fair value on the consolidated balance sheets as a part of other assets, and changes in the fair value are a component of noninterest income. The table below identifies the notional amount, fair value and balance sheet category of the embedded derivatives at June 30, 2021, and December 31, 2020, in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2021 Embedded derivatives $ 8,971 $ 497 Other assets December 31, 2020 Embedded derivatives $ 9,198 $ 680 Other assets The table below identifies the gains and losses recognized on HTLF's embedded derivatives for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2021 Embedded derivatives $ (54) Other noninterest income Six Months Ended June 30, 2021 Embedded derivatives $ (183) Other noninterest income Three Months Ended June 30, 2020 Embedded derivatives $ 1 Other noninterest income Six Months Ended June 30, 2020 Embedded derivatives $ 362 Other noninterest income Back-to-Back Loan Swaps HTLF has interest rate swap loan relationships with customers to meet their financing needs. Upon entering into these loan swaps, HTLF enters into offsetting positions with counterparties in order to minimize interest rate risk. These back-to-back loan swaps qualify as free standing financial derivatives with the fair values reported in other assets and other liabilities on the consolidated balance sheets. HTLF was required to post $30.6 million and $46.5 million as of June 30, 2021, and December 31, 2020, respectively, as collateral related to these back-to-back swaps. HTLF's counterparties were required to pledge $0 at both June 30, 2021, and December 31, 2020. Any gains and losses on these back-to-back swaps are recorded in noninterest income on the consolidated statements of income, and for the three and six months ended June 30, 2021 and June 30, 2020, no gain or loss was recognized. The table below identifies the balance sheet category and fair values of the derivative instruments designated as loan swaps at June 30, 2021, and December 31, 2020, in thousands: Notional Fair Balance Sheet Weighted Weighted June 30, 2021 Customer interest rate swaps $ 438,415 $ 29,394 Other assets 4.50 % 2.43 % Customer interest rate swaps 438,415 (29,394) Other liabilities 2.43 4.50 December 31, 2020 Customer interest rate swaps $ 440,719 $ 43,422 Other assets 4.46 % 2.46 % Customer interest rate swaps 440,719 (43,422) Other liabilities 2.46 4.46 Other Free Standing Derivatives HTLF has entered into interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans and mortgage backed securities that are considered derivative instruments. HTLF enters into forward commitments for the future delivery of residential mortgage loans when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on the commitments to fund the loans as well as on residential mortgage loans available for sale. The fair value of these commitments is recorded on the consolidated balance sheets, with the changes in fair value recorded in the consolidated statements of income as a component of gains on sale of loans held for sale. These derivative contracts are designated as free standing derivative contracts and are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and therefore do not qualify for hedge accounting treatment. HTLF was required to pledge no collateral at both June 30, 2021, and December 31, 2020. HTLF's counterparties were required to pledge no collateral at both June 30, 2021 and December 31, 2020, as collateral for these forward commitments. HTLF acquired undesignated interest rate swaps in 2015. These swaps were entered into primarily for the benefit of customers seeking to manage their interest rate risk and are not designated against specific assets or liabilities on the consolidated balance sheet or forecasted transactions and therefore do not qualify for hedge accounting in accordance with ASC 815. These swaps are carried at fair value on the consolidated balance sheets as a component of other liabilities, with changes in the fair value recorded as a component of other noninterest income. The table below identifies the balance sheet category and fair values of HTLF's other free standing derivative instruments not designated as hedging instruments at June 30, 2021, and December 31, 2020, in thousands: Balance Sheet Category Notional Amount Fair Value June 30, 2021 Interest rate lock commitments (mortgage) Other assets $ 39,922 $ 1,425 Forward commitments Other assets 9,500 8 Forward commitments Other liabilities 59,000 (202) Undesignated interest rate swaps Other liabilities 8,971 (497) December 31, 2020 Interest rate lock commitments (mortgage) Other assets $ 42,078 $ 1,827 Forward commitments Other assets — — Forward commitments Other liabilities 86,500 (697) Undesignated interest rate swaps Other liabilities 9,198 (680) The table below identifies the income statement category of the gains and losses recognized in income on HTLF's other free standing derivative instruments not designated as hedging instruments for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended June 30, 2021 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ (250) Forward commitments Net gains on sale of loans held for sale (1,403) Undesignated interest rate swaps Other noninterest income 54 Six Months Ended June 30, 2021 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ (1,735) Forward commitments Net gains on sale of loans held for sale 503 Undesignated interest rate swaps Other noninterest income 183 Three Months Ended June 30, 2020 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 1,296 Forward commitments Net gains on sale of loans held for sale 962 Undesignated interest rate swaps Other noninterest income (1) Six Months Ended June 30, 2020 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 2,994 Forward commitments Net gains on sale of loans held for sale (184) Undesignated interest rate swaps Other noninterest income (362)

FAIR VALUE

FAIR VALUE	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE HTLF utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Securities carried at fair value, which include available for sale, trading securities and equity securities with a readily determinable fair value, and derivatives are recorded in the consolidated balance sheets at fair value on a recurring basis. Additionally, from time to time, HTLF may be required to record at fair value other assets on a nonrecurring basis such as loans held for sale, loans held to maturity and certain other assets including, but not limited to, mortgage servicing rights, commercial servicing rights and other real estate owned. These nonrecurring fair value adjustments typically involve application of the lower of cost or fair value accounting or write-downs of individual assets. Fair Value Hierarchy Under ASC 820, assets and liabilities are grouped at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1 — Valuation is based upon quoted prices for identical instruments in active markets. Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, or similar instruments in markets that are not active, and model-based valuation techniques for all significant assumptions are observable in the market. Level 3 — Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. The following is a description of valuation methodologies used for assets and liabilities recorded at fair value on a recurring or non-recurring basis. Securities Available for Sale and Held to Maturity Securities available for sale are recorded at fair value on a recurring basis. Securities held to maturity are generally recorded at cost and are recorded at fair value only to the extent a decline in fair value is determined to be other-than-temporary. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security's credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, as well as U.S. Treasury securities. Level 2 securities include U.S. government and agency securities, mortgage and asset-backed securities and private collateralized mortgage obligations, municipal bonds and corporate debt securities. On a quarterly basis, a secondary independent pricing service is used for the securities portfolio to validate the pricing from HTLF's primary pricing service. Equity Securities with a Readily Determinable Fair Value Equity securities with a readily determinable fair value generally include Community Reinvestment Act mutual funds and are classified as Level 2 due to the infrequent trading of these securities. The fair value is based on the price per share. Loans Held for Sale Loans held for sale are carried at the lower of cost or fair value on an aggregate basis. The fair value of loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, HTLF classifies loans held for sale subjected to nonrecurring fair value adjustments as Level 2. Loans Held to Maturity HTLF does not record loans held to maturity at fair value on a recurring basis. However, from time to time, certain loans are considered collateral dependent and an allowance for credit losses is established. The fair value of individually assessed loans is measured using the fair value of the collateral. In accordance with ASC 820, individually assessed loans measured at fair value are classified as nonrecurring Level 3 in the fair value hierarchy. Premises, Furniture and Equipment Held for Sale HTLF values premises, furniture and equipment held for sale based on third-party appraisals less estimated disposal costs. HTLF considers third party appraisals, as well as independent fair value assessments from realtors or persons involved in selling bank premises, furniture and equipment, in determining the fair value of particular properties. Accordingly, the valuation of premises, furniture and equipment held for sale is subject to significant external and internal judgment. HTLF periodically reviews premises, furniture and equipment held for sale to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. Premises, furniture and equipment held for sale are classified as nonrecurring Level 3 in the fair value hierarchy. Mortgage Servicing Rights Mortgage servicing rights assets represent the value associated with servicing residential real estate loans that have been sold to outside investors with servicing retained. The fair value for servicing assets is determined through discounted cash flow analysis and utilizes discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of the assumptions in the discounted cash flow analysis require a significant degree of management estimation and judgment. Mortgage servicing rights are subject to impairment testing. The carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value as performed by an outside third party. For purposes of measuring impairment, the rights are stratified into certain risk characteristics including note type and note term. If the valuation model reflects a fair value less than the carrying value, mortgage servicing rights are adjusted to fair value through a valuation allowance. HTLF classifies mortgage servicing rights as nonrecurring with Level 3 measurement inputs. Commercial Servicing Rights Commercial servicing rights assets represent the value associated with servicing commercial loans guaranteed by the Small Business Administration and the United States Department of Agriculture that have been sold with servicing retained by HTLF. HTLF uses the amortization method (i.e., the lower of amortized cost or estimated fair value measured on a nonrecurring basis), not fair value measurement accounting, to determine the carrying value of its commercial servicing rights. The fair value for servicing assets is determined through market prices for comparable servicing contracts, when available, or through a valuation model that calculates the present value of estimated future net servicing income. Inputs utilized include discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of these assumptions require a significant degree of management estimation and judgment. Commercial servicing rights are subject to impairment testing, and the carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value as performed by an outside third party. If the valuation model reflects a fair value less than the carrying value, commercial servicing rights are adjusted to fair value through a valuation allowance. HTLF classifies commercial servicing rights as nonrecurring with Level 3 measurement inputs. Derivative Financial Instruments HTLF's current interest rate risk strategy includes interest rate swaps. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. To comply with the provisions of ASC 820, HTLF incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, HTLF has considered the impact of netting any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although HTLF has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of June 30, 2021, and December 31, 2020, HTLF has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, HTLF has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Interest rate lock commitments HTLF uses an internal valuation model that relies on internally developed inputs to estimate the fair value of its interest rate lock commitments which is based on unobservable inputs that reflect management's assumptions and specific information about each borrower. Interest rate lock commitments are classified in Level 3 of the fair value hierarchy. Forward commitments The fair value of forward commitments are estimated using an internal valuation model, which includes current trade pricing for similar financial instruments in active markets that HTLF has the ability to access and are classified in Level 2 of the fair value hierarchy. Other Real Estate Owned Other real estate owned ("OREO") represents property acquired through foreclosures and settlements of loans. Property acquired is carried at the fair value of the property at the time of acquisition (representing the property's cost basis), plus any acquisition costs, or the estimated fair value of the property, less disposal costs. HTLF considers third party appraisals, as well as independent fair value assessments from realtors or persons involved in selling OREO, in determining the fair value of particular properties. Accordingly, the valuation of OREO is subject to significant external and internal judgment. HTLF periodically reviews OREO to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. OREO is classified as nonrecurring Level 3 of the fair value hierarchy. The table below presents HTLFs assets and liabilities that are measured at fair value on a recurring basis as of June 30, 2021, and December 31, 2020, in thousands, aggregated by the level in the fair value hierarchy within which those measurements fall: Total Fair Value Level 1 Level 2 Level 3 June 30, 2021 Assets Securities available for sale U.S. treasuries $ 1,016 $ 1,016 $ — $ — U.S. agencies 35,371 — 35,371 — Obligations of states and political subdivisions 1,871,786 — 1,871,786 — Mortgage-backed securities - agency 1,740,675 — 1,740,675 — Mortgage-backed securities - non-agency 1,363,292 — 1,363,292 — Commercial mortgage-backed securities - agency 125,080 — 125,080 — Commercial mortgage-backed securities - non-agency 535,305 — 535,305 — Asset-backed securities 846,987 — 846,987 — Corporate bonds 3,815 — 3,815 — Equity securities with a readily determinable fair value 20,651 — 20,651 — Derivative financial instruments (1) 29,891 — 29,891 — Interest rate lock commitments 1,425 — — 1,425 Forward commitments 8 — 8 — Total assets at fair value $ 6,575,302 $ 1,016 $ 6,572,861 $ 1,425 Liabilities Derivative financial instruments (2) $ 35,268 $ — $ 35,268 $ — Forward commitments 202 — 202 — Total liabilities at fair value $ 35,470 $ — $ 35,470 $ — December 31, 2020 Assets Securities available for sale U.S. treasuries $ 2,026 $ 2,026 $ — $ — U.S. agencies 166,779 — 166,779 — Obligations of states and political subdivisions 1,635,227 — 1,635,227 — Mortgage-backed securities - agency 1,355,270 — 1,355,270 — Mortgage-backed securities - non-agency 1,449,116 — 1,449,116 — Commercial mortgage-backed securities - agency 174,153 — 174,153 — Commercial mortgage-backed securities - non-agency 252,767 — 252,767 — Asset-backed securities 1,069,266 — 1,069,266 — Corporate bonds 3,742 — 3,742 — Equity securities with a readily determinable fair value 19,629 — 19,629 — Derivative financial instruments (1) 44,102 — 44,102 — Interest rate lock commitments 1,827 — — 1,827 Total assets at fair value $ 6,173,904 $ 2,026 $ 6,170,051 $ 1,827 Liabilities Derivative financial instruments (2) $ 51,962 $ — $ 51,962 $ — Forward commitments 697 — 697 — Total liabilities at fair value $ 52,659 $ — $ 52,659 $ — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps, embedded derivatives and free standing derivative instruments. The tables below present HTLF's assets that are measured at fair value on a nonrecurring basis, in thousands: Fair Value Measurements at June 30, 2021 Total Quoted Prices in Significant Other Significant Year-to- Collateral dependent individually assessed loans: Commercial and industrial $ 8,969 $ — $ — $ 8,969 $ 214 Owner occupied commercial real estate 3,573 — — 3,573 — Non-owner occupied commercial real estate 14,742 — — 14,742 1,637 Agricultural and agricultural real estate 14,161 — — 14,161 — Total collateral dependent individually assessed loans $ 41,445 $ — $ — $ 41,445 $ 1,851 Loans held for sale $ 33,248 $ — $ 33,248 $ — $ (1,304) Other real estate owned 6,314 — — 6,314 (88) Premises, furniture and equipment held for sale 6,925 — — 6,925 (44) Servicing rights 5,559 — — 5,559 (391) Fair Value Measurements at Total Quoted Prices in Significant Other Significant Year-to- Collateral dependent individually assessed loans: Commercial and industrial $ 11,256 $ — $ — $ 11,256 $ 451 Owner occupied commercial real estate 5,874 — — 5,874 11,631 Non-owner occupied commercial real estate 4,907 — — 4,907 — Agricultural and agricultural real estate 12,451 — — 12,451 — Total collateral dependent individually assessed loans $ 34,488 $ — $ — $ 34,488 $ 12,082 Loans held for sale $ 57,949 $ — $ 57,949 $ — $ (982) Other real estate owned 6,624 — — 6,624 1,044 Premises, furniture and equipment held for sale 6,499 — — 6,499 3,288 Servicing rights 5,189 — — 5,189 1,778 The following tables present additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which HTLF has utilized Level 3 inputs to determine fair value, in thousands: Fair Value Valuation Unobservable Range Interest rate lock commitments $ 1,425 Discounted cash flows Closing ratio 0-99% (88%) (1) Other real estate owned 6,314 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Servicing rights 5,559 Discounted cash flows Third party valuation (4) Premises, furniture and equipment held for sale 6,925 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Collateral dependent individually assessed loans: Commercial 8,969 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (3) Owner occupied commercial real estate 3,573 Modified appraised value Third party appraisal (2) Appraisal discount 0-7% (3) Non-owner occupied commercial real estate 14,742 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Agricultural and agricultural real estate 14,161 Modified appraised value Third party appraisal (2) Appraisal discount 0-15% (3) (1) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. Fair Value Valuation Unobservable Range Interest rate lock commitments $ 1,827 Discounted cash flows Closing ratio 0-99% (86%) (1) Other real estate owned 6,624 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Servicing rights 5,189 Discounted cash flows Third party valuation (4) Premises, furniture and equipment held for sale 6,499 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Collateral dependent individually assessed loans: Commercial and industrial 11,256 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (3) Fair Value Valuation Unobservable Range Owner occupied commercial real estate 5,874 Modified appraised value Third party appraisal (2) Appraisal discount 0-12% (3) Non-owner occupied commercial real estate 4,907 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Agricultural and agricultural real estate 12,451 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) (1) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments measured on a recurring basis, are summarized in the following table, in thousands: For the Six Months Ended For the Year Ended Balance at January 1, $ 1,827 $ 681 Total net gains included in earnings (1,735) 2,803 Issuances 8,892 17,221 Settlements (7,559) (18,878) Balance at period end $ 1,425 $ 1,827 Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments held at June 30, 2021, and December 31, 2020, were $1.4 million and $1.8 million, respectively. The table below is a summary of the estimated fair value of HTLF's financial instruments (as defined by ASC 825) as of June 30, 2021, and December 31, 2020, in thousands. The carrying amounts in the following tables are recorded in the consolidated balance sheets under the indicated captions. In accordance with ASC 825, the assets and liabilities that are not financial instruments are not included in the disclosure, including the value of the commercial and mortgage servicing rights, premises, furniture and equipment, premises, furniture and equipment held for sale, OREO, goodwill, and other intangibles and other liabilities. HTLF does not believe that the estimated information presented herein is representative of the earnings power or value of HTLF. The following analysis, which is inherently limited in depicting fair value, also does not consider any value associated with either existing customer relationships or the ability of HTLF to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different. Fair Value Measurements at June 30, 2021 Carrying Estimated Quoted Prices in Significant Other Significant Financial assets: Cash and cash equivalents $ 449,128 $ 449,128 $ 449,128 $ — $ — Time deposits in other financial institutions 3,138 3,138 3,138 — — Securities: Carried at fair value 6,543,978 6,543,978 1,016 6,542,962 — Held to maturity 85,439 95,421 — 95,421 — Other investments 76,809 76,809 — 76,809 — Loans held for sale 33,248 33,248 — 33,248 — Loans, net: Commercial and industrial 2,487,576 2,469,136 — 2,460,167 8,969 PPP 829,175 829,175 — 829,175 — Owner occupied commercial real estate 1,920,144 1,901,531 — 1,897,958 3,573 Non-owner occupied commercial real estate 1,964,541 1,953,264 — 1,938,522 14,742 Real estate construction 834,715 838,001 — 838,001 — Agricultural and agricultural real estate 672,448 660,650 — 646,489 14,161 Residential real estate 791,143 789,274 — 789,274 — Consumer 391,546 394,337 — 394,337 — Total Loans, net 9,891,288 9,835,368 — 9,793,923 41,445 Cash surrender value on life insurance 189,619 189,619 — 189,619 — Derivative financial instruments (1) 29,891 29,891 — 29,891 — Interest rate lock commitments 1,425 1,425 — — 1,425 Forward commitments 8 8 — 8 — Financial liabilities: Deposits Demand deposits 6,299,289 6,299,289 — 6,299,289 — Savings deposits 8,189,223 8,189,223 — 8,189,223 — Time deposits 1,126,606 1,126,788 — 1,126,788 — Short term borrowings 152,563 152,563 — 152,563 — Other borrowings 271,244 274,631 — 274,631 — Derivative financial instruments (2) 35,268 35,368 — 35,368 — Forward commitments 202 202 — 202 — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps and free standing derivative instruments. Fair Value Measurements at Carrying Estimated Quoted Prices in Significant Other Significant Financial assets: Cash and cash equivalents $ 337,903 $ 337,903 $ 337,903 $ — $ — Time deposits in other financial institutions 3,129 3,129 3,129 — — Securities: Carried at fair value 6,127,975 6,127,975 2,026 6,125,949 — Held to maturity 88,839 100,041 — 100,041 — Other investments 75,253 75,523 — 75,523 — Loans held for sale 57,949 57,949 — 57,949 — Loans, net: Commercial and industrial 2,495,981 2,391,041 — 2,379,785 11,256 PPP 957,785 957,785 — 957,785 — Owner occupied commercial real estate 1,756,405 1,745,397 — 1,739,523 5,874 Non-owner occupied commercial real estate 1,900,608 1,892,213 — 1,887,306 4,907 Real estate construction 843,140 849,224 — 849,224 — Agricultural and agricultural real estate 707,397 697,729 — 685,278 12,451 Residential real estate 828,507 828,366 — 828,366 — Consumer 401,622 407,914 — 407,914 — Total Loans, net 9,891,445 9,769,669 — 9,735,181 34,488 Cash surrender value on life insurance 187,664 187,664 — 187,664 — Derivative financial instruments (1) 44,102 44,102 — 44,102 — Interest rate lock commitments 1,827 1,827 — — 1,827 Financial liabilities: Deposits Demand deposits 5,688,810 5,688,810 — 5,688,810 — Savings deposits 8,019,704 8,019,704 — 8,019,704 — Time deposits 1,271,391 1,273,468 — 1,273,468 — Short term borrowings 167,872 167,872 — 167,872 — Other borrowings 457,042 458,806 — 458,806 — Derivative financial instruments (1) 51,962 51,962 — 51,962 — Forward commitments 697 697 — 697 — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps and free standing derivative instruments. Cash and Cash Equivalents — The carrying amount is a reasonable estimate of fair value due to the short-term nature of these instruments. Time Deposits in Other Financial Institutions — The carrying amount is a reasonable estimate of fair value due to the short-term nature of these instruments. Securities — For equity securities with a readily determinable fair value and debt securities either held to maturity, available for sale or trading, fair value equals quoted market price if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities. For Level 3 securities, HTLF utilizes independent pricing provided by third party vendors or brokers. Other Investments — Fair value measurement of other investments, which consists primarily of FHLB stock, are based on their redeemable value, which is at cost due to the restrictions placed on their transferability. The market for these securities is restricted to the issuer of the stock and subject to impairment evaluation. Loans — The fair value of loans is determined using an exit price methodology. The exit price estimation of fair value is based on the present value of the expected cash flows. The projected cash flows are based on the contractual terms of the loans, adjusted for prepayments and a discount rate based on the relative risk of the cash flows. Other considerations include the loan type, remaining life of the loan and credit risk. The fair value of individually assessed or impaired loans is measured using the fair value of the underlying collateral. The fair value of loans held for sale is estimated using quoted market prices. Cash surrender value on life insurance — Life insurance policies are held on certain officers. The carrying value of these policies approximates fair value as it is based on the cash surrender value adjusted for other charges or amounts due that are probable at settlement. As such, HTLF classifies the estimated fair value of the cash surrender value on life insurance as Level 2. Derivative Financial Instruments — The fair value of all derivatives is estimated based on the amount that HTLF would pay or would be paid to terminate the contract or agreement, using current rates and prices, and, when appropriate, the current creditworthiness of the counter-party. Interest Rate Lock Commitments — The fair value of interest rate lock commitments is estimated using an internal valuation model, which includes grouping the interest rate lock commitments by interest rate and terms, applying an estimated closing ratio based on historical experience, and then multiplying by quoted investor prices determined to be reasonably applicable to the loan commitment groups based on interest rate, terms, and rate lock expiration dates of the loan commitment group. Forward Commitments — The fair value of these instruments is estimated using an internal valuation model, which includes current trade pricing for similar financial instruments. Deposits — The fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for deposits of similar remaining maturities. If the fair value of the fixed maturity certificates of deposit is calculated at less than the carrying amount, the carrying value of these deposits is reported as the fair value. Short-term and Other Borrowings — Rates currently available to HTLF for debt with similar terms and remaining maturities are used to estimate fair value of existing debt. Commitments to Extend Credit, Unused Lines of Credit and Standby Letters of Credit — Based upon management's analysis of the off balance sheet financial instruments, there are no significant unrealized gains or losses associated with these financial instruments based upon review of the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties.

REVENUE

REVENUE	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers, requires revenue to be recognized at an amount that reflects the consideration to which HTLF expects to be entitled in exchange for transferring goods or services to a customer. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope. The majority of HTLF's revenue streams including interest income, loan servicing income, net securities gain, net unrealized gains and losses on equity securities, net gains on sale of loans held for sale, valuation adjustment on servicing rights, income from bank owned life insurance and other noninterest income are outside the scope of ASC 606. Revenue streams including service charges and fees, interchange fees on credit and debit cards, trust fees and brokerage and insurance commissions are within the scope of ASC 606. Service Charges and Fees Service charges and fees consist of revenue generated from deposit account related service charges and fees, overdraft fees, customer service fees and other service charges, credit card fee income, debit card income and other service charges and fees. Service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts), monthly service fees, check orders and other deposit account related fees. HTLF's performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees, including overdraft fees, are largely transaction based, and therefore, the performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Customer service fees and other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. HTLF's performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Credit card fee income and debit card income are comprised of interchange fees, ATM fees, and merchant services income. Credit card fee income and debit card income are earned whenever the banks' debit and credit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a bank cardholder uses an ATM that is not owned by one of HTLF's banks or a non-bank cardholder uses a HTLF-owned ATM. Merchant services income mainly represents fees charged to merchants to process their debit and credit card transactions, in addition to account management fees. Trust Fees Trust fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. HTLF's performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the average daily market value or month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days before or after month end through a direct charge to customers’ accounts. HTLF does not earn performance-based incentives. HTLF's performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Brokerage and Insurance Commissions Brokerage commission primarily consist of commissions related to broker-dealer contracts. The contracts are between the customer and the broker-dealer, and HTLF satisfies its performance obligation and earns commission when the transactions are completed. The recognition of revenue is based on a defined fee schedule and does not require significant judgment. Payment is received shortly after services are rendered. Insurance commissions are related to commissions received directly from the insurance carrier. HTLF acts as an insurance agent between the customer and the insurance carrier. HTLF's performance obligations and associated fee and commission income are defined with each insurance product with the insurance company. When insurance payments are received from customers, a portion of the payment is recognized as commission revenue. The following table presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and six months ended June 30, 2021, and 2020, in thousands: Three Months Ended Six Months Ended 2021 2020 2021 2020 In-scope of Topic 606 Service charges and fees Service charges and fees on deposit accounts $ 4,014 $ 3,476 $ 7,950 $ 6,913 Overdraft fees 2,549 1,634 5,141 4,443 Customer service and other service fees 54 35 100 94 Credit card fee income 5,854 4,067 10,162 7,967 Debit card income 2,661 1,760 5,450 3,576 Total service charges and fees 15,132 10,972 28,803 22,993 Trust fees 6,039 4,977 11,816 9,999 Brokerage and insurance commissions 865 595 1,718 1,328 Total noninterest income in-scope of Topic 606 22,036 16,544 42,337 34,320 Out-of-scope of Topic 606 Loan servicing income $ 873 $ 379 $ 1,711 $ 1,342 Securities gains, net 2,842 2,006 2,812 3,664 Unrealized gain/ (loss) on equity securities, net 83 680 (27) 449 Net gains on sale of loans held for sale 4,753 7,857 11,173 12,517 Valuation adjustment on servicing rights (526) 9 391 (1,556) Income on bank owned life insurance 937 1,167 1,766 1,665 Other noninterest income 2,166 1,995 3,318 4,053 Total noninterest income out-of-scope of Topic 606 11,128 14,093 21,144 22,134 Total noninterest income $ 33,164 $ 30,637 $ 63,481 $ 56,454 Contract Balances

STOCK COMPENSATION

STOCK COMPENSATION	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
STOCK COMPENSATION	STOCK COMPENSATION HTLF may grant, through its Nominating, Compensation and Corporate Governance Committee (the "Compensation Committee"), non-qualified and incentive stock options, stock appreciation rights, stock awards, restricted stock, restricted stock units and cash incentive awards, under its 2020 Long-Term Incentive Plan (the "Plan"). The Plan was approved by stockholders in May 2020 and replaces the 2012 Long-Term Incentive Plan. The Plan increased the number of shares of common stock authorized for issuance to 1,460,000 and made certain other changes to the Plan. As of June 30, 2021, 1,200,807 shares of common stock were available for issuance under future awards that may be granted under the Plan to employees and directors of, and service providers to, HTLF or its subsidiaries. ASC Topic 718, "Compensation-Stock Compensation," requires the measurement of the cost of employee services received in exchange for an award of equity instruments based upon the fair value of the award on the grant date. The cost of the award is based upon its fair value estimated on the date of grant and recognized in the consolidated statements of income over the vesting period of the award. The fair market value of restricted stock and restricted stock units is based on the fair value of the underlying shares of common stock on the date of grant. Forfeitures are accounted for as they occur. HTLF's income tax expense included $303,000 of tax benefit during the six months ended June 30, 2021 and a tax expense of $91,000 during the six months ended June 30, 2020, related to the exercise, vesting and forfeiture of equity-based awards. Restricted Stock Units The Plan permits the Compensation Committee to grant restricted stock units ("RSUs"). In the first quarter of 2021, the Compensation Committee granted time-based RSUs with respect to 104,462 shares of common stock, and in the first quarter of 2020, the Compensation Committee granted time-based RSUs with respect to 114,944 shares of common stock to selected officers and employees. The time-based RSUs represent the right, without payment, to receive shares of HTLF common stock on a specified date in the future. The time-based RSUs granted in 2021 and 2020 vest over three years in equal installments in March of each of the three years following the year of the grant. The time-based RSUs may also vest upon death or disability, upon a change in control or upon a "qualified retirement" (as defined in the RSU agreement). The retiree is required to sign a non-solicitation agreement as a condition to vesting. The Compensation Committee also granted three three The three twenty-four All of HTLF's RSUs will be settled in common stock upon vesting and are not entitled to dividends until vested. The Compensation Committee may grant RSUs under the Plan to non-employee HTLF and subsidiary bank directors as part of their compensation, to new management level employees at commencement of employment, and to other employees and service providers as incentives. During the six months ended June 30, 2021, and June 30, 2020, 41,974 and 46,613 time-based RSUs, respectively, were granted to directors and new employees. A summary of the RSUs outstanding as of June 30, 2021, and June 30, 2020, and changes during the six months ended June 30, 2021 and 2020, follows: 2021 2020 Shares Weighted-Average Grant Date Shares Weighted-Average Grant Date Outstanding at January 1, 348,275 $ 38.22 254,383 $ 46.76 Granted 208,513 51.63 212,344 32.00 Vested (146,381) 40.89 (118,686) 44.52 Forfeited (18,861) 42.88 (14,648) 47.00 Outstanding at June 30, 391,546 $ 44.08 333,393 $ 38.55 Total compensation costs recorded for RSUs were $4.6 million and $3.4 million for the six months ended June 30, 2021 and 2020. As of June 30, 2021, there were $11.3 million of total unrecognized compensation costs related to the Plan for RSUs that are expected to be recognized through 2024.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The interim unaudited consolidated financial statements contained herein should be read in conjunction with the audited consolidated financial statements and accompanying notes to the consolidated financial statements for the fiscal year ended December 31, 2020, included in the Form 10-K of Heartland Financial USA, Inc. ("HTLF") filed with the Securities and Exchange Commission ("SEC") on February 25, 2021 . Foot note disclosures to the interim unaudited consolidated financial statements which would substantially duplicate the disclosure contained in the footnotes to the audited consolidated financial statements have been omitted. The financial information included herein has been prepared in accordance with U.S. generally accepted accounting principles for interim financial reporting and has been prepared pursuant to the rules and regulations for reporting on Form 10-Q and Rule 10-01 of Regulation S-X. Such information reflects all adjustments (consisting of normal recurring adjustments), that are, in the opinion of management, necessary for a fair presentation of the financial position and results of operations for the periods presented. The results of the interim period ended June 30, 2021, are not necessarily indicative of the results expected for the year ending December 31, 2021.
Earnings Per Share	Basic earnings per share is determined using net income available to common stockholders and weighted average common shares outstanding. Diluted earnings per share is computed by dividing net income available to common stockholders by the weighted average common shares and assumed incremental common shares issued.
Subsequent Events	HTLF has evaluated subsequent events that may require recognition or disclosure through the filing date of this Quarterly Report on Form 10-Q with the SEC.
Effect of New Financial Accounting Standards	ASU 2018-16 In October 2018, the FASB issued ASU 2018-16, " Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting." In the United States, eligible benchmark interest rates under Topic 815 are interest rates on direct Treasury obligations of the U.S. government, the London Interbank Offered Rate ("LIBOR") swap rate, and the Overnight Index Swap ("OIS") Rate based on the Fed Funds Effective Rate. When the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , in August 2017, it introduced the Securities Industry and Financial Markets Association ("SIFMA") Municipal Swap Rate as the fourth permissible U.S. benchmark rate. ASU 2018-16 adds the OIS rate based on the Secured Overnight Financing Rate ("SOFR") as a U.S. benchmark interest rate to facilitate the LIBOR to SOFR transition and provide sufficient lead time for entities to prepare for changes to interest rate risk hedging strategies for both risk management and hedge accounting purposes. ASU 2018-16 became effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years and the financial statement impact immediately upon adoption was immaterial. The future financial statement impact will depend on any new contracts entered into using new benchmark rates, as well as any existing contracts that are migrated from LIBOR to new benchmark interest rates. HTLF has a formal working group that is currently evaluating the impact of the transition from LIBOR as an interest rate benchmark to other potential alternative reference rates, including but not limited to the SOFR. Currently, HTLF has adjustable rate loans, several debt obligations and securities and derivative instruments in place that reference LIBOR-based rates. The transition from LIBOR is expected to take place at the end of 2021, and management will continue to actively assess the related opportunities and risks involved in this transition. ASU 2019-12 In December 2019, the FASB issued ASU 2019-12, "Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes." ASU 2019-12 simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU 2019-12 also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. HTLF adopted this ASU on January 1, 2021, as required, and the adoption did not have a material impact on its results of operations, financial position and liquidity. ASU 2020-04 In March 2020, the FASB issued ASU 2020-04, " Reference Rate Reform, " which provides optional expedients and exceptions for applying GAAP to loan and lease agreements, derivative contracts, and other transactions affected by the anticipated transition away from LIBOR toward new interest rate benchmarks. For loan and lease agreements that are modified because of reference rate reform and that meet certain scope guidance (i) modifications of loan agreements should be accounted for by prospectively adjusting the effective interest rate, and the modifications would be considered "minor" with the result that any existing unamortized origination fees/costs would carry forward and continue to be amortized and (ii) modifications of lease agreements should be accounted for as a continuation of the existing agreement, with no reassessments of the lease classification and the discount rate or remeasurements of lease payments that otherwise would be required for modifications not accounted for as separate contracts. ASU 2020-04 also provides numerous optional expedients for derivative accounting. ASU 2020-04 is effective March 12, 2020 through December 31, 2022. An entity may elect to apply ASU 2020-04 for contract modifications as of January 1, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. Once elected for a Topic or an Industry Subtopic within the ASC, ASU 2020-04 must be applied prospectively for all eligible contract modifications for that Topic or Industry Subtopic. HTLF anticipates that ASU 2020-04 will simplify any modifications executed between the selected start date and December 31, 2022 that are directly related to LIBOR transition by allowing prospective recognition of the continuation of the contract, rather than extinguishment of the old contract that would result in writing off unamortized fees/costs. Management will continue to actively assess the impacts of ASU 2020-04 and the related opportunities and risks involved in the LIBOR transition.
Fair Value Hierarchy	Under ASC 820, assets and liabilities are grouped at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1 — Valuation is based upon quoted prices for identical instruments in active markets. Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, or similar instruments in markets that are not active, and model-based valuation techniques for all significant assumptions are observable in the market. Level 3 — Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. The following is a description of valuation methodologies used for assets and liabilities recorded at fair value on a recurring or non-recurring basis. Securities Available for Sale and Held to Maturity Securities available for sale are recorded at fair value on a recurring basis. Securities held to maturity are generally recorded at cost and are recorded at fair value only to the extent a decline in fair value is determined to be other-than-temporary. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security's credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, as well as U.S. Treasury securities. Level 2 securities include U.S. government and agency securities, mortgage and asset-backed securities and private collateralized mortgage obligations, municipal bonds and corporate debt securities. On a quarterly basis, a secondary independent pricing service is used for the securities portfolio to validate the pricing from HTLF's primary pricing service. Equity Securities with a Readily Determinable Fair Value Equity securities with a readily determinable fair value generally include Community Reinvestment Act mutual funds and are classified as Level 2 due to the infrequent trading of these securities. The fair value is based on the price per share. Loans Held for Sale Loans held for sale are carried at the lower of cost or fair value on an aggregate basis. The fair value of loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, HTLF classifies loans held for sale subjected to nonrecurring fair value adjustments as Level 2. Loans Held to Maturity HTLF does not record loans held to maturity at fair value on a recurring basis. However, from time to time, certain loans are considered collateral dependent and an allowance for credit losses is established. The fair value of individually assessed loans is measured using the fair value of the collateral. In accordance with ASC 820, individually assessed loans measured at fair value are classified as nonrecurring Level 3 in the fair value hierarchy. Premises, Furniture and Equipment Held for Sale HTLF values premises, furniture and equipment held for sale based on third-party appraisals less estimated disposal costs. HTLF considers third party appraisals, as well as independent fair value assessments from realtors or persons involved in selling bank premises, furniture and equipment, in determining the fair value of particular properties. Accordingly, the valuation of premises, furniture and equipment held for sale is subject to significant external and internal judgment. HTLF periodically reviews premises, furniture and equipment held for sale to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. Premises, furniture and equipment held for sale are classified as nonrecurring Level 3 in the fair value hierarchy. Mortgage Servicing Rights Mortgage servicing rights assets represent the value associated with servicing residential real estate loans that have been sold to outside investors with servicing retained. The fair value for servicing assets is determined through discounted cash flow analysis and utilizes discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of the assumptions in the discounted cash flow analysis require a significant degree of management estimation and judgment. Mortgage servicing rights are subject to impairment testing. The carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value as performed by an outside third party. For purposes of measuring impairment, the rights are stratified into certain risk characteristics including note type and note term. If the valuation model reflects a fair value less than the carrying value, mortgage servicing rights are adjusted to fair value through a valuation allowance. HTLF classifies mortgage servicing rights as nonrecurring with Level 3 measurement inputs. Commercial Servicing Rights Commercial servicing rights assets represent the value associated with servicing commercial loans guaranteed by the Small Business Administration and the United States Department of Agriculture that have been sold with servicing retained by HTLF. HTLF uses the amortization method (i.e., the lower of amortized cost or estimated fair value measured on a nonrecurring basis), not fair value measurement accounting, to determine the carrying value of its commercial servicing rights. The fair value for servicing assets is determined through market prices for comparable servicing contracts, when available, or through a valuation model that calculates the present value of estimated future net servicing income. Inputs utilized include discount rates, prepayment speeds and delinquency rate assumptions as inputs. All of these assumptions require a significant degree of management estimation and judgment. Commercial servicing rights are subject to impairment testing, and the carrying values of these rights are reviewed quarterly for impairment based upon the calculation of fair value as performed by an outside third party. If the valuation model reflects a fair value less than the carrying value, commercial servicing rights are adjusted to fair value through a valuation allowance. HTLF classifies commercial servicing rights as nonrecurring with Level 3 measurement inputs. Derivative Financial Instruments HTLF's current interest rate risk strategy includes interest rate swaps. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. To comply with the provisions of ASC 820, HTLF incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, HTLF has considered the impact of netting any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although HTLF has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of June 30, 2021, and December 31, 2020, HTLF has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, HTLF has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Interest rate lock commitments HTLF uses an internal valuation model that relies on internally developed inputs to estimate the fair value of its interest rate lock commitments which is based on unobservable inputs that reflect management's assumptions and specific information about each borrower. Interest rate lock commitments are classified in Level 3 of the fair value hierarchy. Forward commitments The fair value of forward commitments are estimated using an internal valuation model, which includes current trade pricing for similar financial instruments in active markets that HTLF has the ability to access and are classified in Level 2 of the fair value hierarchy. Other Real Estate Owned Other real estate owned ("OREO") represents property acquired through foreclosures and settlements of loans. Property acquired is carried at the fair value of the property at the time of acquisition (representing the property's cost basis), plus any acquisition costs, or the estimated fair value of the property, less disposal costs. HTLF considers third party appraisals, as well as independent fair value assessments from realtors or persons involved in selling OREO, in determining the fair value of particular properties. Accordingly, the valuation of OREO is subject to significant external and internal judgment. HTLF periodically reviews OREO to determine if the fair value of the property, less disposal costs, has declined below its recorded book value and records any adjustments accordingly. OREO is classified as nonrecurring Level 3 of the fair value hierarchy.
Revenue Recognition	Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers, requires revenue to be recognized at an amount that reflects the consideration to which HTLF expects to be entitled in exchange for transferring goods or services to a customer. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope. The majority of HTLF's revenue streams including interest income, loan servicing income, net securities gain, net unrealized gains and losses on equity securities, net gains on sale of loans held for sale, valuation adjustment on servicing rights, income from bank owned life insurance and other noninterest income are outside the scope of ASC 606. Revenue streams including service charges and fees, interchange fees on credit and debit cards, trust fees and brokerage and insurance commissions are within the scope of ASC 606. Service Charges and Fees Service charges and fees consist of revenue generated from deposit account related service charges and fees, overdraft fees, customer service fees and other service charges, credit card fee income, debit card income and other service charges and fees. Service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts), monthly service fees, check orders and other deposit account related fees. HTLF's performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees, including overdraft fees, are largely transaction based, and therefore, the performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Customer service fees and other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. HTLF's performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Credit card fee income and debit card income are comprised of interchange fees, ATM fees, and merchant services income. Credit card fee income and debit card income are earned whenever the banks' debit and credit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a bank cardholder uses an ATM that is not owned by one of HTLF's banks or a non-bank cardholder uses a HTLF-owned ATM. Merchant services income mainly represents fees charged to merchants to process their debit and credit card transactions, in addition to account management fees. Trust Fees Trust fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. HTLF's performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the average daily market value or month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days before or after month end through a direct charge to customers’ accounts. HTLF does not earn performance-based incentives. HTLF's performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Brokerage and Insurance Commissions Brokerage commission primarily consist of commissions related to broker-dealer contracts. The contracts are between the customer and the broker-dealer, and HTLF satisfies its performance obligation and earns commission when the transactions are completed. The recognition of revenue is based on a defined fee schedule and does not require significant judgment. Payment is received shortly after services are rendered. Insurance commissions are related to commissions received directly from the insurance carrier. HTLF acts as an insurance agent between the customer and the insurance carrier. HTLF's performance obligations and associated fee and commission income are defined with each insurance product with the insurance company. When insurance payments are received from customers, a portion of the payment is recognized as commission revenue.

BASIS OF PRESENTATION (Tables)

BASIS OF PRESENTATION (Tables)	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Amounts used in the determination of basic and diluted earnings per share for the three- and six- months ended June 30, 2021, and 2020, are shown in the table below, dollars and number of shares in thousands, except per share data: Three Months Ended 2021 2020 Net income $ 61,605 $ 30,131 Preferred dividends (2,012) — Net income available to common stockholders $ 59,593 $ 30,131 Weighted average common shares outstanding for basic earnings per share 42,243 36,881 Assumed incremental common shares issued upon vesting of outstanding restricted stock units 117 35 Weighted average common shares for diluted earnings per share 42,360 36,916 Earnings per common share — basic $ 1.41 $ 0.82 Earnings per common share — diluted $ 1.41 $ 0.82 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation 1 54 Six Months Ended 2021 2020 Net income $ 114,419 $ 50,171 Preferred dividends (4,025) — Net income available to stockholders $ 110,394 $ 50,171 Weighted average common shares outstanding for basic earnings per share 42,210 36,851 Assumed incremental common shares issued upon vesting of outstanding restricted stock units 147 69 Weighted average common shares for diluted earnings per share 42,357 36,920 Earnings per common share — basic $ 2.62 $ 1.36 Earnings per common share — diluted $ 2.61 $ 1.36 Number of antidilutive common stock equivalents excluded from diluted earnings per share computation 60 1

SECURITIES (Tables)

SECURITIES (Tables)	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Available for Sale Securities	The amortized cost, gross unrealized gains and losses, and estimated fair values of debt securities available for sale and equity securities with a readily determinable fair value that are carried at fair value as of June 30, 2021, and December 31, 2020, are summarized in the table below, in thousands: Amortized Gross Gross Estimated June 30, 2021 U.S. treasuries $ 996 $ 20 $ — $ 1,016 U.S. agencies 35,591 272 (492) 35,371 Obligations of states and political subdivisions 1,817,708 66,037 (11,959) 1,871,786 Mortgage-backed securities - agency 1,741,389 19,890 (20,604) 1,740,675 Mortgage-backed securities - non-agency 1,349,005 16,062 (1,775) 1,363,292 Commercial mortgage-backed securities - agency 124,441 2,439 (1,800) 125,080 Commercial mortgage-backed securities - non-agency 534,682 823 (200) 535,305 Asset-backed securities 835,476 12,640 (1,129) 846,987 Corporate bonds 3,744 71 — 3,815 Total debt securities 6,443,032 118,254 (37,959) 6,523,327 Equity securities with a readily determinable fair value 20,651 — — 20,651 Total $ 6,463,683 $ 118,254 $ (37,959) $ 6,543,978 December 31, 2020 U.S. treasuries $ 1,995 $ 31 $ — $ 2,026 U.S. agencies 167,048 657 (926) 166,779 Obligations of states and political subdivisions 1,562,631 75,555 (2,959) 1,635,227 Mortgage-backed securities - agency 1,351,964 16,029 (12,723) 1,355,270 Mortgage-backed securities - non-agency 1,428,068 22,688 (1,640) 1,449,116 Commercial mortgage-backed securities - agency 171,451 3,440 (738) 174,153 Commercial mortgage-backed securities - non-agency 253,421 37 (691) 252,767 Asset-backed securities 1,064,255 9,421 (4,410) 1,069,266 Corporate bonds 3,763 8 (29) 3,742 Total debt securities 6,004,596 127,866 (24,116) 6,108,346 Equity securities with a readily determinable fair value 19,629 — — 19,629 Total $ 6,024,225 $ 127,866 $ (24,116) $ 6,127,975
Schedule of Held to Maturity Securities	The amortized cost, gross unrealized gains and losses and estimated fair values of held to maturity securities as of June 30, 2021, and December 31, 2020, are summarized in the table below, in thousands: Amortized Gross Gross Estimated Allowance for Credit Losses June 30, 2021 Obligations of states and political subdivisions $ 85,490 $ 9,931 $ — $ 95,421 $ (51) Total $ 85,490 $ 9,931 $ — $ 95,421 $ (51) December 31, 2020 Obligations of states and political subdivisions $ 88,890 $ 11,151 $ — $ 100,041 $ (51) Total $ 88,890 $ 11,151 $ — $ 100,041 $ (51)
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities carried at fair value at June 30, 2021, by contractual maturity, are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties. June 30, 2021 Amortized Cost Estimated Fair Value Due in 1 year or less $ 13,286 $ 13,351 Due in 1 to 5 years 18,199 19,153 Due in 5 to 10 years 198,036 202,564 Due after 10 years 1,628,518 1,676,920 Total debt securities 1,858,039 1,911,988 Mortgage and asset-backed securities 4,584,993 4,611,339 Equity securities with a readily determinable fair value 20,651 20,651 Total investment securities $ 6,463,683 $ 6,543,978 The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2021, by contractual maturity, are as follows, in thousands. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties. June 30, 2021 Amortized Cost Estimated Fair Value Due in 1 year or less $ 2,196 $ 2,209 Due in 1 to 5 years 42,172 44,028 Due in 5 to 10 years 32,451 37,240 Due after 10 years 8,671 11,944 Total debt securities 85,490 95,421 Allowance for credit losses (51) — Total investment securities $ 85,439 $ 95,421
Schedule of Realized Gross Gains (Losses)	Gross gains and losses realized related to the sales of securities carried at fair value for the three and six months ended June 30, 2021 and 2020, are summarized as follows, in thousands: Three Months Ended Six Months Ended 2021 2020 2021 2020 Proceeds from sales $ 423,415 $ 182,749 $ 630,481 $ 511,639 Gross security gains 3,844 3,958 4,289 6,862 Gross security losses 1,002 1,952 1,477 3,198
Schedule of Debt Securities Available-for-sale	The following table summarizes, in thousands, the amount of unrealized losses, defined as the amount by which cost or amortized cost exceeds fair value, and the related fair value of investments with unrealized losses in the securities portfolio as of June 30, 2021, and December 31, 2020. The investments were segregated into two categories: those that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 months or more. The reference point for determining how long an investment was in an unrealized loss position w as June 30, 2020, and December 31, 2019 , respectively. Debt securities available for sale Less than 12 months 12 months or longer Total Fair Unrealized Count Fair Unrealized Count Fair Unrealized Count June 30, 2021 U.S. agencies 18,983 (492) 1 — — — 18,983 (492) 1 Obligations of states and political subdivisions 591,597 (11,887) 107 6,719 (72) 2 598,316 (11,959) 109 Mortgage-backed securities - agency 1,025,619 (19,499) 58 37,181 (1,105) 4 1,062,800 (20,604) 62 Mortgage-backed securities - non-agency 541,131 (1,345) 12 33,988 (430) 5 575,119 (1,775) 17 Commercial mortgage-backed securities - agency 69,690 (1,800) 11 — — — 69,690 (1,800) 11 Commercial mortgage-backed securities - non-agency — — — 15,960 (200) 2 15,960 (200) 2 Asset-backed securities 77,475 (319) 7 35,779 (810) 11 113,254 (1,129) 18 Corporate bonds — — — — — — — — — Total temporarily impaired securities $ 2,324,495 $ (35,342) 196 $ 129,627 $ (2,617) 24 $ 2,454,122 $ (37,959) 220 December 31, 2020 U.S. agencies 2,981 (8) 5 99,922 (918) 72 102,903 (926) 77 Obligations of states and political subdivisions 346,598 (2,959) 49 — — — 346,598 (2,959) 49 Mortgage-backed securities - agency 653,793 (12,342) 35 31,012 (381) 3 684,805 (12,723) 38 Mortgage-backed securities - non-agency 378,843 (1,639) 17 1,622 (1) 1 380,465 (1,640) 18 Commercial mortgage-backed securities - agency 46,541 (738) 6 — — — 46,541 (738) 6 Commercial mortgage-backed securities - non-agency 100,042 (15) 2 35,428 (676) 3 135,470 (691) 5 Asset-backed securities 141,824 (643) 9 340,452 (3,767) 24 482,276 (4,410) 33 Corporate bonds 1,908 (29) 4 — — — 1,908 (29) 4 Total temporarily impaired securities $ 1,672,530 $ (18,373) 127 $ 508,436 $ (5,743) 103 $ 2,180,966 $ (24,116) 230
Schedule of Debt Securities, Held-to-maturity, Allowance for Credit Loss	The following tables present, in thousands, the activity in the allowance for credit losses for securities held to maturity by obligations of states and political subdivisions securities for the three and six months ended June 30, 2021 and 2020: Three Months Ended 2021 2020 Beginning balance $ 48 $ 197 Provision (benefit) for credit losses 3 (135) Balance at period end $ 51 $ 62 Six Months Ended 2021 2020 Beginning balance $ 51 $ — Impact of ASU 2016-13 adoption — 158 Adjusted balance 51 158 Provision (benefit) for credit losses — (96) Balance at period end $ 51 $ 62
Schedule of Financing Receivable Credit Quality Indicators	The following table summarizes, in thousands, the carrying amount of HTLF's held to maturity debt securities by investment rating as of June 30, 2021 and December 31, 2020, which are updated quarterly and used to monitor the credit quality of the securities: June 30, 2021 December 31, 2020 Rating AAA $ 3,207 $ — AA, AA+, AA- 62,526 64,385 A+, A, A- 15,006 18,353 BBB 4,751 4,208 Not Rated — 1,944 Total $ 85,490 $ 88,890 The following tables show the risk category of loans by loan category and year of origination as of June 30, 2021, and December 31, 2020, in thousands: As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total Commercial and industrial Pass $ 330,626 $ 475,749 $ 277,874 $ 122,550 $ 197,617 $ 370,896 $ 528,785 $ 2,304,097 Watch 7,252 13,154 22,947 12,886 8,633 17,574 35,506 117,952 Substandard 2,171 21,377 10,899 8,780 11,706 21,646 20,280 96,859 Commercial and industrial total $ 340,049 $ 510,280 $ 311,720 $ 144,216 $ 217,956 $ 410,116 $ 584,571 $ 2,518,908 As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total PPP Pass $ 409,922 $ 327,475 $ — $ — $ — $ — $ — $ 737,397 Watch 21,880 28,769 — — — — — 50,649 Substandard 20,697 20,432 — — — — — 41,129 PPP total $ 452,499 $ 376,676 $ — $ — $ — $ — $ — $ 829,175 Owner occupied commercial real estate Pass $ 331,097 $ 402,216 $ 371,104 $ 232,062 $ 143,692 $ 264,190 $ 27,773 $ 1,772,134 Watch 428 17,998 14,979 18,715 19,869 10,305 2,250 84,544 Substandard 743 18,083 13,464 7,908 13,903 28,201 1,154 83,456 Owner occupied commercial real estate total $ 332,268 $ 438,297 $ 399,547 $ 258,685 $ 177,464 $ 302,696 $ 31,177 $ 1,940,134 Non-owner occupied commercial real estate Pass $ 206,934 $ 332,479 $ 355,445 $ 275,853 $ 163,047 $ 266,547 $ 32,340 $ 1,632,645 Watch 16,873 18,884 76,447 30,786 8,233 53,339 4,524 209,086 Substandard 16,968 13,315 20,879 23,329 24,802 46,035 310 145,638 Non-owner occupied commercial real estate total $ 240,775 $ 364,678 $ 452,771 $ 329,968 $ 196,082 $ 365,921 $ 37,174 $ 1,987,369 Real estate construction Pass $ 151,473 $ 338,101 $ 215,455 $ 49,360 $ 10,003 $ 8,959 $ 17,078 $ 790,429 Watch — 1,865 11,474 47,460 240 210 413 61,662 Substandard — — 28 1,993 — 183 — 2,204 Real estate construction total $ 151,473 $ 339,966 $ 226,957 $ 98,813 $ 10,243 $ 9,352 $ 17,491 $ 854,295 Agricultural and agricultural real estate Pass $ 115,287 $ 125,764 $ 79,157 $ 46,698 $ 28,105 $ 43,350 $ 134,975 $ 573,336 Watch 3,480 13,591 5,746 2,197 256 3,735 4,735 33,740 Substandard 9,082 8,793 6,886 20,498 5,641 11,210 10,422 72,532 Agricultural and agricultural real estate total $ 127,849 $ 148,148 $ 91,789 $ 69,393 $ 34,002 $ 58,295 $ 150,132 $ 679,608 Residential real estate Pass $ 144,046 $ 116,571 $ 65,840 $ 82,530 $ 56,628 $ 277,236 $ 28,244 $ 771,095 Watch 1,236 1,966 1,634 1,703 2,039 6,998 — 15,576 Substandard 4,147 859 299 1,889 1,259 5,760 — 14,213 Residential real estate total $ 149,429 $ 119,396 $ 67,773 $ 86,122 $ 59,926 $ 289,994 $ 28,244 $ 800,884 Consumer Pass $ 39,485 $ 26,718 $ 20,157 $ 13,147 $ 12,112 $ 21,088 $ 259,705 $ 392,412 Watch 4 132 220 1,362 130 508 1,234 3,590 Substandard 848 432 612 474 371 2,104 798 5,639 Consumer total $ 40,337 $ 27,282 $ 20,989 $ 14,983 $ 12,613 $ 23,700 $ 261,737 $ 401,641 Total Pass $ 1,728,870 $ 2,145,073 $ 1,385,032 $ 822,200 $ 611,204 $ 1,252,266 $ 1,028,900 $ 8,973,545 Total Watch 51,153 96,359 133,447 115,109 39,400 92,669 48,662 576,799 Total Substandard 54,656 83,291 53,067 64,871 57,682 115,139 32,964 461,670 Total Loans $ 1,834,679 $ 2,324,723 $ 1,571,546 $ 1,002,180 $ 708,286 $ 1,460,074 $ 1,110,526 $ 10,012,014 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Commercial and industrial Pass $ 557,853 $ 340,809 $ 168,873 $ 215,696 $ 101,010 $ 337,834 $ 541,627 $ 2,263,702 Watch 41,574 24,676 19,672 14,262 8,072 2,474 49,432 160,162 Substandard 23,024 16,274 8,897 15,717 9,098 19,537 18,388 110,935 Commercial and industrial total $ 622,451 $ 381,759 $ 197,442 $ 245,675 $ 118,180 $ 359,845 $ 609,447 $ 2,534,799 PPP Pass $ 880,709 $ — $ — $ — $ — $ — $ — $ 880,709 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Watch 22,533 — — — — — — 22,533 Substandard 54,543 — — — — — — 54,543 PPP total $ 957,785 $ — $ — $ — $ — $ — $ — $ 957,785 Owner occupied commercial real estate Pass $ 400,662 $ 369,401 $ 300,242 $ 167,470 $ 107,234 $ 213,780 $ 33,759 $ 1,592,548 Watch 15,345 13,764 22,488 20,811 8,717 15,282 4,311 100,718 Substandard 15,914 9,522 12,164 14,147 8,580 21,708 1,105 83,140 Owner occupied commercial real estate total $ 431,921 $ 392,687 $ 334,894 $ 202,428 $ 124,531 $ 250,770 $ 39,175 $ 1,776,406 Non-owner occupied commercial real estate Pass $ 334,722 $ 411,301 $ 305,456 $ 194,101 $ 108,070 $ 233,153 $ 24,466 $ 1,611,269 Watch 22,826 55,225 24,718 18,724 20,954 45,672 5,114 193,233 Substandard 30,899 15,035 23,290 17,046 9,147 21,060 502 116,979 Non-owner occupied commercial real estate total $ 388,447 $ 481,561 $ 353,464 $ 229,871 $ 138,171 $ 299,885 $ 30,082 $ 1,921,481 Real estate construction Pass $ 311,625 $ 309,678 $ 157,171 $ 12,625 $ 6,954 $ 5,110 $ 21,431 $ 824,594 Watch 2,105 26,659 2,403 332 55 388 1,295 33,237 Substandard 196 2,760 2,036 — 39 358 — 5,389 Real estate construction total $ 313,926 $ 339,097 $ 161,610 $ 12,957 $ 7,048 $ 5,856 $ 22,726 $ 863,220 Agricultural and agricultural real estate Pass $ 171,578 $ 90,944 $ 62,349 $ 39,252 $ 17,626 $ 37,696 $ 148,456 $ 567,901 Watch 20,500 16,202 8,854 2,448 3,515 3,157 12,282 66,958 Substandard 17,403 7,044 23,519 6,758 3,917 9,952 11,074 79,667 Agricultural and agricultural real estate total $ 209,481 $ 114,190 $ 94,722 $ 48,458 $ 25,058 $ 50,805 $ 171,812 $ 714,526 Residential real estate Pass $ 153,017 $ 99,440 $ 118,854 $ 83,534 $ 63,477 $ 244,852 $ 33,467 $ 796,641 Watch 3,986 4,507 2,188 1,896 3,117 8,525 — 24,219 Substandard 980 442 2,507 1,528 884 12,141 1,100 19,582 Residential real estate total $ 157,983 $ 104,389 $ 123,549 $ 86,958 $ 67,478 $ 265,518 $ 34,567 $ 840,442 Consumer Pass $ 37,037 $ 27,646 $ 18,811 $ 15,034 $ 4,009 $ 19,483 $ 280,996 $ 403,016 Watch 168 352 647 340 82 646 1,622 3,857 Substandard 481 959 1,884 500 897 1,976 822 7,519 Consumer total $ 37,686 $ 28,957 $ 21,342 $ 15,874 $ 4,988 $ 22,105 $ 283,440 $ 414,392 Total Pass $ 2,847,203 $ 1,649,219 $ 1,131,756 $ 727,712 $ 408,380 $ 1,091,908 $ 1,084,202 $ 8,940,380 Total Watch 129,037 141,385 80,970 58,813 44,512 76,144 74,056 604,917 Total Substandard 143,440 52,036 74,297 55,696 32,562 86,732 32,991 477,754 Total Loans $ 3,119,680 $ 1,842,640 $ 1,287,023 $ 842,221 $ 485,454 $ 1,254,784 $ 1,191,249 $ 10,023,051

LOANS (Tables)

LOANS (Tables)	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Schedule of Loans	Loans as of June 30, 2021, and December 31, 2020, were as follows, in thousands: June 30, 2021 December 31, 2020 Loans receivable held to maturity: Commercial and industrial $ 2,518,908 $ 2,534,799 Paycheck Protection Program ("PPP") 829,175 957,785 Owner occupied commercial real estate 1,940,134 1,776,406 Non-owner occupied commercial real estate 1,987,369 1,921,481 Real estate construction 854,295 863,220 Agricultural and agricultural real estate 679,608 714,526 Residential real estate 800,884 840,442 Consumer 401,641 414,392 Total loans receivable held to maturity 10,012,014 10,023,051 Allowance for credit losses (120,726) (131,606) Loans receivable, net $ 9,891,288 $ 9,891,445
Allowance for Loan and Lease Losses, Based on Impairment Methodology	The following table shows the balance in the allowance for credit losses at June 30, 2021, and December 31, 2020, and the related loan balances, disaggregated on the basis of measurement methodology, in thousands. If a loan no longer shares similar risk characteristics with other loans in the pool, it is evaluated on an individual basis and is not included in the collective evaluation. Lending relationships with $500,000 or more of total exposure and are on nonaccrual are individually assessed using a collateral dependency calculation. All other loans are collectively evaluated for losses. Allowance For Credit Losses Gross Loans Receivable Held to Maturity Individually Evaluated for Credit Losses Collectively Evaluated for Credit Losses Total Loans Individually Evaluated for Credit Losses Loans Collectively Evaluated for Credit Losses Total June 30, 2021 Commercial and industrial $ 4,688 $ 26,644 $ 31,332 $ 13,658 $ 2,505,250 $ 2,518,908 PPP — — — — 829,175 829,175 Owner occupied commercial real estate 110 19,880 19,990 7,547 1,932,587 1,940,134 Non-owner occupied commercial real estate 3,485 19,343 22,828 19,548 1,967,821 1,987,369 Real estate construction — 19,580 19,580 — 854,295 854,295 Agricultural and agricultural real estate 3,106 4,054 7,160 17,948 661,660 679,608 Residential real estate — 9,741 9,741 — 800,884 800,884 Consumer — 10,095 10,095 — 401,641 401,641 Total $ 11,389 $ 109,337 $ 120,726 $ 58,701 $ 9,953,313 $ 10,012,014 Allowance For Credit Losses Gross Loans Receivable Held to Maturity Individually Evaluated for Credit Losses Collectively Evaluated for Credit Losses Total Loans Individually Evaluated for Credit Losses Loans Collectively Evaluated for Credit Losses Total December 31, 2020 Commercial and industrial $ 4,077 $ 34,741 $ 38,818 $ 16,578 $ 2,518,221 $ 2,534,799 PPP — — — — 957,785 957,785 Owner occupied commercial real estate 111 19,890 20,001 11,174 1,765,232 1,776,406 Non-owner occupied commercial real estate 3,250 17,623 20,873 13,490 1,907,991 1,921,481 Real estate construction — 20,080 20,080 — 863,220 863,220 Agricultural and agricultural real estate 1,988 5,141 7,129 15,453 699,073 714,526 Residential real estate — 11,935 11,935 535 839,907 840,442 Consumer — 12,770 12,770 — 414,392 414,392 Total $ 9,426 $ 122,180 $ 131,606 $ 57,230 $ 9,965,821 $ 10,023,051
Troubled Debt Restructuring on Loans Modified	The following tables provide information on troubled debt restructured loans that were modified during the three- and six- months ended June 30, 2021, and June 30, 2020, dollars in thousands: Three Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Commercial — $ — $ — — $ — $ — PPP — — — — — — Owner occupied commercial real estate — — — — — — Non-owner occupied commercial real estate 2 7,850 7,850 — — — Real estate construction — — — — — — Agricultural and agricultural real estate — — — — — — Residential real estate — — — 1 60 66 Consumer — — — — — — Total 2 $ 7,850 $ 7,850 1 $ 60 $ 66 Six Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Commercial and industrial — $ — $ — — $ — $ — PPP — — — — — — Owner occupied commercial real estate — — — — — — Non-owner occupied commercial real estate 2 7,850 7,850 — — — Real estate construction — — — — — — Agricultural and agricultural real estate — — — — — — Six Months Ended 2021 2020 Number Pre- Post- Number Pre- Post- Residential real estate — — — 2 92 98 Consumer — — — — — — Total 2 $ 7,850 $ 7,850 2 $ 92 $ 98
Schedule of Financing Receivable Credit Quality Indicators	The following table summarizes, in thousands, the carrying amount of HTLF's held to maturity debt securities by investment rating as of June 30, 2021 and December 31, 2020, which are updated quarterly and used to monitor the credit quality of the securities: June 30, 2021 December 31, 2020 Rating AAA $ 3,207 $ — AA, AA+, AA- 62,526 64,385 A+, A, A- 15,006 18,353 BBB 4,751 4,208 Not Rated — 1,944 Total $ 85,490 $ 88,890 The following tables show the risk category of loans by loan category and year of origination as of June 30, 2021, and December 31, 2020, in thousands: As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total Commercial and industrial Pass $ 330,626 $ 475,749 $ 277,874 $ 122,550 $ 197,617 $ 370,896 $ 528,785 $ 2,304,097 Watch 7,252 13,154 22,947 12,886 8,633 17,574 35,506 117,952 Substandard 2,171 21,377 10,899 8,780 11,706 21,646 20,280 96,859 Commercial and industrial total $ 340,049 $ 510,280 $ 311,720 $ 144,216 $ 217,956 $ 410,116 $ 584,571 $ 2,518,908 As of June 30, 2021 Amortized Cost Basis of Term Loans by Year of Origination 2021 2020 2019 2018 2017 2016 and Prior Revolving Total PPP Pass $ 409,922 $ 327,475 $ — $ — $ — $ — $ — $ 737,397 Watch 21,880 28,769 — — — — — 50,649 Substandard 20,697 20,432 — — — — — 41,129 PPP total $ 452,499 $ 376,676 $ — $ — $ — $ — $ — $ 829,175 Owner occupied commercial real estate Pass $ 331,097 $ 402,216 $ 371,104 $ 232,062 $ 143,692 $ 264,190 $ 27,773 $ 1,772,134 Watch 428 17,998 14,979 18,715 19,869 10,305 2,250 84,544 Substandard 743 18,083 13,464 7,908 13,903 28,201 1,154 83,456 Owner occupied commercial real estate total $ 332,268 $ 438,297 $ 399,547 $ 258,685 $ 177,464 $ 302,696 $ 31,177 $ 1,940,134 Non-owner occupied commercial real estate Pass $ 206,934 $ 332,479 $ 355,445 $ 275,853 $ 163,047 $ 266,547 $ 32,340 $ 1,632,645 Watch 16,873 18,884 76,447 30,786 8,233 53,339 4,524 209,086 Substandard 16,968 13,315 20,879 23,329 24,802 46,035 310 145,638 Non-owner occupied commercial real estate total $ 240,775 $ 364,678 $ 452,771 $ 329,968 $ 196,082 $ 365,921 $ 37,174 $ 1,987,369 Real estate construction Pass $ 151,473 $ 338,101 $ 215,455 $ 49,360 $ 10,003 $ 8,959 $ 17,078 $ 790,429 Watch — 1,865 11,474 47,460 240 210 413 61,662 Substandard — — 28 1,993 — 183 — 2,204 Real estate construction total $ 151,473 $ 339,966 $ 226,957 $ 98,813 $ 10,243 $ 9,352 $ 17,491 $ 854,295 Agricultural and agricultural real estate Pass $ 115,287 $ 125,764 $ 79,157 $ 46,698 $ 28,105 $ 43,350 $ 134,975 $ 573,336 Watch 3,480 13,591 5,746 2,197 256 3,735 4,735 33,740 Substandard 9,082 8,793 6,886 20,498 5,641 11,210 10,422 72,532 Agricultural and agricultural real estate total $ 127,849 $ 148,148 $ 91,789 $ 69,393 $ 34,002 $ 58,295 $ 150,132 $ 679,608 Residential real estate Pass $ 144,046 $ 116,571 $ 65,840 $ 82,530 $ 56,628 $ 277,236 $ 28,244 $ 771,095 Watch 1,236 1,966 1,634 1,703 2,039 6,998 — 15,576 Substandard 4,147 859 299 1,889 1,259 5,760 — 14,213 Residential real estate total $ 149,429 $ 119,396 $ 67,773 $ 86,122 $ 59,926 $ 289,994 $ 28,244 $ 800,884 Consumer Pass $ 39,485 $ 26,718 $ 20,157 $ 13,147 $ 12,112 $ 21,088 $ 259,705 $ 392,412 Watch 4 132 220 1,362 130 508 1,234 3,590 Substandard 848 432 612 474 371 2,104 798 5,639 Consumer total $ 40,337 $ 27,282 $ 20,989 $ 14,983 $ 12,613 $ 23,700 $ 261,737 $ 401,641 Total Pass $ 1,728,870 $ 2,145,073 $ 1,385,032 $ 822,200 $ 611,204 $ 1,252,266 $ 1,028,900 $ 8,973,545 Total Watch 51,153 96,359 133,447 115,109 39,400 92,669 48,662 576,799 Total Substandard 54,656 83,291 53,067 64,871 57,682 115,139 32,964 461,670 Total Loans $ 1,834,679 $ 2,324,723 $ 1,571,546 $ 1,002,180 $ 708,286 $ 1,460,074 $ 1,110,526 $ 10,012,014 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Commercial and industrial Pass $ 557,853 $ 340,809 $ 168,873 $ 215,696 $ 101,010 $ 337,834 $ 541,627 $ 2,263,702 Watch 41,574 24,676 19,672 14,262 8,072 2,474 49,432 160,162 Substandard 23,024 16,274 8,897 15,717 9,098 19,537 18,388 110,935 Commercial and industrial total $ 622,451 $ 381,759 $ 197,442 $ 245,675 $ 118,180 $ 359,845 $ 609,447 $ 2,534,799 PPP Pass $ 880,709 $ — $ — $ — $ — $ — $ — $ 880,709 As of December 31, 2020 Amortized Cost Basis of Term Loans by Year of Origination 2020 2019 2018 2017 2016 2015 and Prior Revolving Total Watch 22,533 — — — — — — 22,533 Substandard 54,543 — — — — — — 54,543 PPP total $ 957,785 $ — $ — $ — $ — $ — $ — $ 957,785 Owner occupied commercial real estate Pass $ 400,662 $ 369,401 $ 300,242 $ 167,470 $ 107,234 $ 213,780 $ 33,759 $ 1,592,548 Watch 15,345 13,764 22,488 20,811 8,717 15,282 4,311 100,718 Substandard 15,914 9,522 12,164 14,147 8,580 21,708 1,105 83,140 Owner occupied commercial real estate total $ 431,921 $ 392,687 $ 334,894 $ 202,428 $ 124,531 $ 250,770 $ 39,175 $ 1,776,406 Non-owner occupied commercial real estate Pass $ 334,722 $ 411,301 $ 305,456 $ 194,101 $ 108,070 $ 233,153 $ 24,466 $ 1,611,269 Watch 22,826 55,225 24,718 18,724 20,954 45,672 5,114 193,233 Substandard 30,899 15,035 23,290 17,046 9,147 21,060 502 116,979 Non-owner occupied commercial real estate total $ 388,447 $ 481,561 $ 353,464 $ 229,871 $ 138,171 $ 299,885 $ 30,082 $ 1,921,481 Real estate construction Pass $ 311,625 $ 309,678 $ 157,171 $ 12,625 $ 6,954 $ 5,110 $ 21,431 $ 824,594 Watch 2,105 26,659 2,403 332 55 388 1,295 33,237 Substandard 196 2,760 2,036 — 39 358 — 5,389 Real estate construction total $ 313,926 $ 339,097 $ 161,610 $ 12,957 $ 7,048 $ 5,856 $ 22,726 $ 863,220 Agricultural and agricultural real estate Pass $ 171,578 $ 90,944 $ 62,349 $ 39,252 $ 17,626 $ 37,696 $ 148,456 $ 567,901 Watch 20,500 16,202 8,854 2,448 3,515 3,157 12,282 66,958 Substandard 17,403 7,044 23,519 6,758 3,917 9,952 11,074 79,667 Agricultural and agricultural real estate total $ 209,481 $ 114,190 $ 94,722 $ 48,458 $ 25,058 $ 50,805 $ 171,812 $ 714,526 Residential real estate Pass $ 153,017 $ 99,440 $ 118,854 $ 83,534 $ 63,477 $ 244,852 $ 33,467 $ 796,641 Watch 3,986 4,507 2,188 1,896 3,117 8,525 — 24,219 Substandard 980 442 2,507 1,528 884 12,141 1,100 19,582 Residential real estate total $ 157,983 $ 104,389 $ 123,549 $ 86,958 $ 67,478 $ 265,518 $ 34,567 $ 840,442 Consumer Pass $ 37,037 $ 27,646 $ 18,811 $ 15,034 $ 4,009 $ 19,483 $ 280,996 $ 403,016 Watch 168 352 647 340 82 646 1,622 3,857 Substandard 481 959 1,884 500 897 1,976 822 7,519 Consumer total $ 37,686 $ 28,957 $ 21,342 $ 15,874 $ 4,988 $ 22,105 $ 283,440 $ 414,392 Total Pass $ 2,847,203 $ 1,649,219 $ 1,131,756 $ 727,712 $ 408,380 $ 1,091,908 $ 1,084,202 $ 8,940,380 Total Watch 129,037 141,385 80,970 58,813 44,512 76,144 74,056 604,917 Total Substandard 143,440 52,036 74,297 55,696 32,562 86,732 32,991 477,754 Total Loans $ 3,119,680 $ 1,842,640 $ 1,287,023 $ 842,221 $ 485,454 $ 1,254,784 $ 1,191,249 $ 10,023,051
Past Due Financing Receivables	The following table sets forth information regarding accruing and nonaccrual loans at June 30, 2021, and December 31, 2020, in thousands: Accruing Loans 30-59 60-89 90 Days or Total Current Nonaccrual Total Loans June 30, 2021 Commercial and industrial $ 1,537 $ 1,034 $ 12 $ 2,583 $ 2,498,207 $ 18,118 $ 2,518,908 PPP — — — — 829,175 — 829,175 Owner occupied commercial real estate 1,134 — — 1,134 1,929,086 9,914 1,940,134 Non-owner occupied commercial real estate 1,374 1,350 — 2,724 1,963,775 20,870 1,987,369 Real estate construction 2,834 — — 2,834 851,053 408 854,295 Agricultural and agricultural real estate 2,759 1,716 — 4,475 654,135 20,998 679,608 Residential real estate 2,192 118 85 2,395 785,637 12,852 800,884 Consumer 679 222 — 901 398,632 2,108 401,641 Total gross loans receivable held to maturity $ 12,509 $ 4,440 $ 97 $ 17,046 $ 9,909,700 $ 85,268 $ 10,012,014 December 31, 2020 Commercial and industrial $ 5,825 $ 2,322 $ 720 $ 8,867 $ 2,504,170 $ 21,762 $ 2,534,799 PPP 1 — — 1 957,784 — 957,785 Owner occupied commercial real estate 2,815 167 — 2,982 1,759,649 13,775 1,776,406 Non-owner occupied commercial real estate 2,143 2,674 — 4,817 1,902,003 14,661 1,921,481 Real estate construction 2,446 96 — 2,542 859,784 894 863,220 Agricultural and agricultural real estate 1,688 — — 1,688 694,150 18,688 714,526 Residential real estate 1,675 83 — 1,758 825,047 13,637 840,442 Consumer 807 139 — 946 409,477 3,969 414,392 Total gross loans receivable held to maturity $ 17,400 $ 5,481 $ 720 $ 23,601 $ 9,912,064 $ 87,386 $ 10,023,051

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	6 Months Ended
	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
Changes in the Allowance for Loan and Leases Losses	Changes in the allowance for credit losses on loans for the three- and six- months ended June 30, 2021, and June 30, 2020, were as follows, in thousands: Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Agricultural and Agricultural Real Estate Residential Consumer Total Balance at March 31, 2021 $ 36,095 $ — $ 19,416 $ 24,694 $ 19,931 $ 7,111 $ 11,012 $ 11,913 $ 130,172 Charge-offs (842) — (72) (1,637) (10) (357) (70) (509) (3,497) Recoveries 265 — 44 13 4 — — 191 517 Provision (4,186) — 602 (242) (345) 406 (1,201) (1,500) (6,466) Balance at June 30, 2021 $ 31,332 $ — $ 19,990 $ 22,828 $ 19,580 $ 7,160 $ 9,741 $ 10,095 $ 120,726 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Residential Consumer Total Balance at December 31, 2020 $ 38,818 $ — $ 20,001 $ 20,873 $ 20,080 $ 7,129 $ 11,935 $ 12,770 $ 131,606 Charge-offs (1,790) — (113) (1,637) (10) (675) (91) (1,307) (5,623) Recoveries 558 — 97 13 6 21 5 493 1,193 Provision (6,254) — 5 3,579 (496) 685 (2,108) (1,861) (6,450) Balance at June 30, 2021 $ 31,332 $ — $ 19,990 $ 22,828 $ 19,580 $ 7,160 $ 9,741 $ 10,095 $ 120,726 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Real Estate Residential Consumer Total Balance at March 31, 2020 $ 32,455 — 10,337 8,320 22,951 $ 4,797 $ 8,725 $ 9,765 $ 97,350 Charge-offs (2,536) — (213) (19) (84) (1) (235) (476) (3,564) Recoveries 345 — 191 8 210 — 92 298 1,144 Provision 2,254 — 13,087 1,852 5,590 905 722 597 25,007 Balance at June 30, 2020 $ 32,518 $ 32,531 $ — $ 23,402 $ 10,161 $ 28,667 $ 5,701 $ 9,304 $ 10,184 $ 119,937 Commercial PPP Owner Occupied Commercial Real Estate Non-Owner Occupied Commercial Real Estate Real Estate Construction Agricultural and Agricultural Residential Consumer Total Balance at December 31, 2019 $ 34,207 $ — $ 7,921 $ 7,584 $ 8,677 $ 5,680 $ 1,504 $ 4,822 $ 70,395 Impact of ASU 2016-13 adoption (272) — (114) (2,617) 6,335 (387) 4,817 4,309 12,071 Adjusted balance at January 1, 2020 33,935 — 7,807 4,967 15,012 5,293 6,321 9,131 82,466 Charge-offs (7,767) — (213) (19) (105) (254) (314) (1,193) (9,865) Recoveries 610 — 192 8 215 826 95 518 2,464 Provision 5,740 — 15,616 5,205 13,545 (164) 3,202 1,728 44,872 Balance at June 30, 2020 $ 32,518 $ — $ 23,402 $ 10,161 $ 28,667 $ 5,701 $ 9,304 $ 10,184 $ 119,937
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	Changes in the allowance for credit losses on unfunded commitments for the three and six months ended June 30, 2021 and June 30, 2020, were as follows: For the Three Months Ended June 30, 2021 2020 Balance at March 31, $ 14,619 $ 15,468 Provision (617) 1,924 Balance at June 30, $ 14,002 $ 17,392 For the Six Months Ended June 30, 2021 2020 Balance at December 31, $ 15,280 $ 248 Impact of ASU 2016-13 adoption on January 1, 2020 — 13,604 Adjusted balance at January 1, 15,280 13,852 Provision (1,278) 3,540 Balance at June 30, $ 14,002 $ 17,392

GOODWILL, CORE DEPOSIT PREMIU_2

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Tables)	6 Months Ended
	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets	The gross carrying amount of these intangible assets and the associated accumulated amortization at June 30, 2021, and December 31, 2020, are presented in the table below, in thousands: June 30, 2021 December 31, 2020 Gross Accumulated Net Gross Accumulated Net Amortizing intangible assets: Core deposit intangibles $ 101,185 $ 63,883 $ 37,302 $ 101,185 $ 58,970 $ 42,215 Customer relationship intangibles 1,177 1,027 150 1,177 1,009 168 Mortgage servicing rights 11,971 6,412 5,559 11,268 6,079 5,189 Commercial servicing rights 7,054 6,412 642 7,054 6,191 863 Total $ 121,387 $ 77,734 $ 43,653 $ 120,684 $ 72,249 $ 48,435
Schedule of Estimated Future Amortization Expense of Amortizable Intangible Assets	The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands: Core Customer Mortgage Commercial Six months ending December 31, 2021 $ 4,446 $ 18 $ 648 $ 110 $ 5,222 Year ending December 31, 2022 7,702 34 1,228 194 9,158 2023 6,739 33 1,052 139 7,963 2024 5,591 33 877 96 6,597 2025 4,700 32 702 103 5,537 2026 3,533 — 526 — 4,059 Thereafter 4,591 — 526 — 5,117 Total $ 37,302 $ 150 $ 5,559 $ 642 $ 43,653
Schedule of Servicing Asset at Fair Value and Amortized Cost	The following table summarizes, in thousands, the book value, the fair value of each tranche of the mortgage servicing rights and any recorded valuation allowance at June 30, 2021, and December 31, 2020: Book Value 15-Year Tranche Fair Value 15-Year Tranche Valuation Allowance Book Value 30-Year Tranche Fair Value 30-Year Tranche Valuation Allowance June 30, 2021 $ 1,627 $ 1,157 $ 470 $ 6,287 $ 4,402 $ 1,885 December 31, 2020 $ 1,522 $ 1,100 $ 422 $ 5,445 $ 4,089 $ 1,356 The following table summarizes, in thousands, the book value, the fair value of each tranche of the commercial servicing rights and any recorded valuation allowance at June 30, 2021, and December 31, 2020: Book Value Fair Value Valuation Allowance Book Value Fair Value Valuation Allowance June 30, 2021 $ 58 $ 170 $ — $ 584 $ 934 $ — December 31, 2020 $ 87 $ 203 $ — $ 776 $ 1,085 $ —
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Summary of Changes in Servicing Rights	The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2021, and June 30, 2020: 2021 2020 Balance at January 1, $ 5,189 $ 5,621 Originations 703 1,490 Amortization (724) (1,070) Valuation adjustment 391 (1,556) Balance at period end $ 5,559 $ 4,485 Mortgage servicing rights, net to servicing portfolio 0.77 % 0.68 %
Commercial servicing rights
Finite-Lived Intangible Assets [Line Items]
Summary of Changes in Servicing Rights	The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the six months ended June 30, 2021, and June 30, 2020: 2021 2020 Balance at January 1, $ 863 $ 1,115 Originations — 38 Amortization (221) (169) Balance at period end $ 642 $ 984 Fair value of commercial servicing rights $ 1,104 $ 1,417 Commercial servicing rights, net to servicing portfolio 1.12 % 1.32 %

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Balance Sheet Category and Fair Values of Embedded Derivatives	The table below identifies the notional amount, fair value and balance sheet category of the embedded derivatives at June 30, 2021, and December 31, 2020, in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2021 Embedded derivatives $ 8,971 $ 497 Other assets December 31, 2020 Embedded derivatives $ 9,198 $ 680 Other assets The table below identifies the gains and losses recognized on HTLF's embedded derivatives for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2021 Embedded derivatives $ (54) Other noninterest income Six Months Ended June 30, 2021 Embedded derivatives $ (183) Other noninterest income Three Months Ended June 30, 2020 Embedded derivatives $ 1 Other noninterest income Six Months Ended June 30, 2020 Embedded derivatives $ 362 Other noninterest income
Schedule of Other Derivatives Not Designated as Hedging Instruments, Balance Sheet and Income Category	The table below identifies the balance sheet category and fair values of HTLF's other free standing derivative instruments not designated as hedging instruments at June 30, 2021, and December 31, 2020, in thousands: Balance Sheet Category Notional Amount Fair Value June 30, 2021 Interest rate lock commitments (mortgage) Other assets $ 39,922 $ 1,425 Forward commitments Other assets 9,500 8 Forward commitments Other liabilities 59,000 (202) Undesignated interest rate swaps Other liabilities 8,971 (497) December 31, 2020 Interest rate lock commitments (mortgage) Other assets $ 42,078 $ 1,827 Forward commitments Other assets — — Forward commitments Other liabilities 86,500 (697) Undesignated interest rate swaps Other liabilities 9,198 (680) The table below identifies the income statement category of the gains and losses recognized in income on HTLF's other free standing derivative instruments not designated as hedging instruments for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Income Statement Category Gain (Loss) Recognized Three Months Ended June 30, 2021 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ (250) Forward commitments Net gains on sale of loans held for sale (1,403) Undesignated interest rate swaps Other noninterest income 54 Six Months Ended June 30, 2021 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ (1,735) Forward commitments Net gains on sale of loans held for sale 503 Undesignated interest rate swaps Other noninterest income 183 Three Months Ended June 30, 2020 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 1,296 Forward commitments Net gains on sale of loans held for sale 962 Undesignated interest rate swaps Other noninterest income (1) Six Months Ended June 30, 2020 Interest rate lock commitments (mortgage) Net gains on sale of loans held for sale $ 2,994 Forward commitments Net gains on sale of loans held for sale (184) Undesignated interest rate swaps Other noninterest income (362)
Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Balance Sheet Category and Fair Values of Derivative Instruments	The table below identifies the balance sheet category and fair values of HTLF's derivative instruments designated as cash flow hedges at June 30, 2021, and December 31, 2020, in thousands: Notional Fair Balance Receive Weighted Maturity June 30, 2021 Interest rate swap $ 21,250 $ (1,636) Other liabilities 2.591 % 5.425 % 07/24/2028 Interest rate swap 20,000 (1,107) Other liabilities 0.119 2.390 06/15/2024 Interest rate swap 20,000 (1,049) Other liabilities 0.135 2.352 03/01/2024 December 31, 2020 Interest rate swap $ 25,000 $ (127) Other liabilities 0.229 % 2.255 % 03/17/2021 Interest rate swap 21,667 (91) Other liabilities 2.649 3.674 05/10/2021 Interest rate swap 22,750 (2,220) Other liabilities 2.643 5.425 07/24/2028 Interest rate swap 20,000 (1,482) Other liabilities 0.217 2.390 06/15/2024 Interest rate swap 20,000 (1,385) Other liabilities 0.225 2.352 03/01/2024 Interest rate swap 6,000 (50) Other liabilities 0.217 1.866 06/15/2021 Interest rate swap 3,000 (25) Other liabilities 0.241 1.878 06/30/2021
Gains (Losses) on Derivative Instruments	The table below identifies the gains and losses recognized on HTLF's derivative instruments designated as cash flow hedges for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Effective Portion Ineffective Portion Recognized in OCI Reclassified from AOCI into Income Recognized in Income on Derivatives Amount of Category Amount of Category Amount of Three Months Ended June 30, 2021 Interest rate swaps $ 291 Interest expense $ 454 Other income $ — Six Months Ended June 30, 2021 Interest rate swaps $ 1,588 Interest expense $ 1,045 Other income $ — Three Months Ended June 30, 2020 Interest rate swap $ (100) Interest Expense $ 417 Other Income $ — Six Months Ended June 30, 2020 Interest rate swap $ (3,963) Interest Expense $ 600 Other Income $ —
Fair value hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Balance Sheet Category and Fair Values of Derivative Instruments	The table below identifies the notional amount, fair value and balance sheet category of HTLF's fair value hedges at June 30, 2021, and December 31, 2020, in thousands: Notional Amount Fair Value Balance Sheet Category June 30, 2021 Fair value hedges $ 16,901 $ (1,585) Other liabilities December 31, 2020 Fair value hedges $ 20,841 $ (2,480) Other liabilities
Gains (Losses) on Derivative Instruments	The table below identifies the gains and losses recognized on HTLF's fair value hedges for the three- and six- months ended June 30, 2021, and June 30, 2020, in thousands: Amount of Gain (Loss) Income Statement Category Three Months Ended June 30, 2021 Fair value hedges $ 132 Interest income Six Months Ended June 30, 2021 Fair value hedges $ 895 Interest income Three Months Ended June 30, 2020 Fair value hedges $ 4 Interest income Six Months Ended June 30, 2020 Fair value hedges $ (1,673) Interest income
Loan Swap Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Balance Sheet Category and Fair Values of Derivative Instruments	The table below identifies the balance sheet category and fair values of the derivative instruments designated as loan swaps at June 30, 2021, and December 31, 2020, in thousands: Notional Fair Balance Sheet Weighted Weighted June 30, 2021 Customer interest rate swaps $ 438,415 $ 29,394 Other assets 4.50 % 2.43 % Customer interest rate swaps 438,415 (29,394) Other liabilities 2.43 4.50 December 31, 2020 Customer interest rate swaps $ 440,719 $ 43,422 Other assets 4.46 % 2.46 % Customer interest rate swaps 440,719 (43,422) Other liabilities 2.46 4.46

FAIR VALUE (Tables)

FAIR VALUE (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The table below presents HTLFs assets and liabilities that are measured at fair value on a recurring basis as of June 30, 2021, and December 31, 2020, in thousands, aggregated by the level in the fair value hierarchy within which those measurements fall: Total Fair Value Level 1 Level 2 Level 3 June 30, 2021 Assets Securities available for sale U.S. treasuries $ 1,016 $ 1,016 $ — $ — U.S. agencies 35,371 — 35,371 — Obligations of states and political subdivisions 1,871,786 — 1,871,786 — Mortgage-backed securities - agency 1,740,675 — 1,740,675 — Mortgage-backed securities - non-agency 1,363,292 — 1,363,292 — Commercial mortgage-backed securities - agency 125,080 — 125,080 — Commercial mortgage-backed securities - non-agency 535,305 — 535,305 — Asset-backed securities 846,987 — 846,987 — Corporate bonds 3,815 — 3,815 — Equity securities with a readily determinable fair value 20,651 — 20,651 — Derivative financial instruments (1) 29,891 — 29,891 — Interest rate lock commitments 1,425 — — 1,425 Forward commitments 8 — 8 — Total assets at fair value $ 6,575,302 $ 1,016 $ 6,572,861 $ 1,425 Liabilities Derivative financial instruments (2) $ 35,268 $ — $ 35,268 $ — Forward commitments 202 — 202 — Total liabilities at fair value $ 35,470 $ — $ 35,470 $ — December 31, 2020 Assets Securities available for sale U.S. treasuries $ 2,026 $ 2,026 $ — $ — U.S. agencies 166,779 — 166,779 — Obligations of states and political subdivisions 1,635,227 — 1,635,227 — Mortgage-backed securities - agency 1,355,270 — 1,355,270 — Mortgage-backed securities - non-agency 1,449,116 — 1,449,116 — Commercial mortgage-backed securities - agency 174,153 — 174,153 — Commercial mortgage-backed securities - non-agency 252,767 — 252,767 — Asset-backed securities 1,069,266 — 1,069,266 — Corporate bonds 3,742 — 3,742 — Equity securities with a readily determinable fair value 19,629 — 19,629 — Derivative financial instruments (1) 44,102 — 44,102 — Interest rate lock commitments 1,827 — — 1,827 Total assets at fair value $ 6,173,904 $ 2,026 $ 6,170,051 $ 1,827 Liabilities Derivative financial instruments (2) $ 51,962 $ — $ 51,962 $ — Forward commitments 697 — 697 — Total liabilities at fair value $ 52,659 $ — $ 52,659 $ — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps, embedded derivatives and free standing derivative instruments.
Fair Value Measurements, Nonrecurring	The tables below present HTLF's assets that are measured at fair value on a nonrecurring basis, in thousands: Fair Value Measurements at June 30, 2021 Total Quoted Prices in Significant Other Significant Year-to- Collateral dependent individually assessed loans: Commercial and industrial $ 8,969 $ — $ — $ 8,969 $ 214 Owner occupied commercial real estate 3,573 — — 3,573 — Non-owner occupied commercial real estate 14,742 — — 14,742 1,637 Agricultural and agricultural real estate 14,161 — — 14,161 — Total collateral dependent individually assessed loans $ 41,445 $ — $ — $ 41,445 $ 1,851 Loans held for sale $ 33,248 $ — $ 33,248 $ — $ (1,304) Other real estate owned 6,314 — — 6,314 (88) Premises, furniture and equipment held for sale 6,925 — — 6,925 (44) Servicing rights 5,559 — — 5,559 (391) Fair Value Measurements at Total Quoted Prices in Significant Other Significant Year-to- Collateral dependent individually assessed loans: Commercial and industrial $ 11,256 $ — $ — $ 11,256 $ 451 Owner occupied commercial real estate 5,874 — — 5,874 11,631 Non-owner occupied commercial real estate 4,907 — — 4,907 — Agricultural and agricultural real estate 12,451 — — 12,451 — Total collateral dependent individually assessed loans $ 34,488 $ — $ — $ 34,488 $ 12,082 Loans held for sale $ 57,949 $ — $ 57,949 $ — $ (982) Other real estate owned 6,624 — — 6,624 1,044 Premises, furniture and equipment held for sale 6,499 — — 6,499 3,288 Servicing rights 5,189 — — 5,189 1,778
Fair Value Inputs, Assets, Quantitative Information	The following tables present additional quantitative information about assets measured at fair value on a recurring and nonrecurring basis and for which HTLF has utilized Level 3 inputs to determine fair value, in thousands: Fair Value Valuation Unobservable Range Interest rate lock commitments $ 1,425 Discounted cash flows Closing ratio 0-99% (88%) (1) Other real estate owned 6,314 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Servicing rights 5,559 Discounted cash flows Third party valuation (4) Premises, furniture and equipment held for sale 6,925 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Collateral dependent individually assessed loans: Commercial 8,969 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (3) Owner occupied commercial real estate 3,573 Modified appraised value Third party appraisal (2) Appraisal discount 0-7% (3) Non-owner occupied commercial real estate 14,742 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Agricultural and agricultural real estate 14,161 Modified appraised value Third party appraisal (2) Appraisal discount 0-15% (3) (1) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups. Fair Value Valuation Unobservable Range Interest rate lock commitments $ 1,827 Discounted cash flows Closing ratio 0-99% (86%) (1) Other real estate owned 6,624 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Servicing rights 5,189 Discounted cash flows Third party valuation (4) Premises, furniture and equipment held for sale 6,499 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Collateral dependent individually assessed loans: Commercial and industrial 11,256 Modified appraised value Third party appraisal (2) Appraisal discount 0-8% (3) Fair Value Valuation Unobservable Range Owner occupied commercial real estate 5,874 Modified appraised value Third party appraisal (2) Appraisal discount 0-12% (3) Non-owner occupied commercial real estate 4,907 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) Agricultural and agricultural real estate 12,451 Modified appraised value Third party appraisal (2) Appraisal discount 0-10% (3) (1) The significant unobservable input used in the fair value measurement is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. The closing ratio calculation takes into consideration historical data and loan-level data. (2) Third party appraisals are obtained and updated at least annually to establish the value of the underlying asset, but the disclosure of the unobservable inputs used by the appraisers would not be meaningful because the range will vary widely from appraisal to appraisal. (3) Discounts applied to the appraised values primarily include estimated sales costs, but also consider the age of the appraisal, changes in local market conditions and changes in the current condition of the collateral. (4) The significant unobservable input used in the fair value measurement are the value indices, which are weighted-average spreads to LIBOR based on maturity groups.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The changes in fair value of the interest rate lock commitments, which are Level 3 financial instruments measured on a recurring basis, are summarized in the following table, in thousands: For the Six Months Ended For the Year Ended Balance at January 1, $ 1,827 $ 681 Total net gains included in earnings (1,735) 2,803 Issuances 8,892 17,221 Settlements (7,559) (18,878) Balance at period end $ 1,425 $ 1,827
Fair Value, by Balance Sheet Grouping	HTLF does not believe that the estimated information presented herein is representative of the earnings power or value of HTLF. The following analysis, which is inherently limited in depicting fair value, also does not consider any value associated with either existing customer relationships or the ability of HTLF to create value through loan origination, deposit gathering or fee generating activities. Many of the estimates presented herein are based upon the use of highly subjective information and assumptions and, accordingly, the results may not be precise. Management believes that fair value estimates may not be comparable between financial institutions due to the wide range of permitted valuation techniques and numerous estimates which must be made. Furthermore, because the disclosed fair value amounts were estimated as of the balance sheet date, the amounts actually realized or paid upon maturity or settlement of the various financial instruments could be significantly different. Fair Value Measurements at June 30, 2021 Carrying Estimated Quoted Prices in Significant Other Significant Financial assets: Cash and cash equivalents $ 449,128 $ 449,128 $ 449,128 $ — $ — Time deposits in other financial institutions 3,138 3,138 3,138 — — Securities: Carried at fair value 6,543,978 6,543,978 1,016 6,542,962 — Held to maturity 85,439 95,421 — 95,421 — Other investments 76,809 76,809 — 76,809 — Loans held for sale 33,248 33,248 — 33,248 — Loans, net: Commercial and industrial 2,487,576 2,469,136 — 2,460,167 8,969 PPP 829,175 829,175 — 829,175 — Owner occupied commercial real estate 1,920,144 1,901,531 — 1,897,958 3,573 Non-owner occupied commercial real estate 1,964,541 1,953,264 — 1,938,522 14,742 Real estate construction 834,715 838,001 — 838,001 — Agricultural and agricultural real estate 672,448 660,650 — 646,489 14,161 Residential real estate 791,143 789,274 — 789,274 — Consumer 391,546 394,337 — 394,337 — Total Loans, net 9,891,288 9,835,368 — 9,793,923 41,445 Cash surrender value on life insurance 189,619 189,619 — 189,619 — Derivative financial instruments (1) 29,891 29,891 — 29,891 — Interest rate lock commitments 1,425 1,425 — — 1,425 Forward commitments 8 8 — 8 — Financial liabilities: Deposits Demand deposits 6,299,289 6,299,289 — 6,299,289 — Savings deposits 8,189,223 8,189,223 — 8,189,223 — Time deposits 1,126,606 1,126,788 — 1,126,788 — Short term borrowings 152,563 152,563 — 152,563 — Other borrowings 271,244 274,631 — 274,631 — Derivative financial instruments (2) 35,268 35,368 — 35,368 — Forward commitments 202 202 — 202 — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps and free standing derivative instruments. Fair Value Measurements at Carrying Estimated Quoted Prices in Significant Other Significant Financial assets: Cash and cash equivalents $ 337,903 $ 337,903 $ 337,903 $ — $ — Time deposits in other financial institutions 3,129 3,129 3,129 — — Securities: Carried at fair value 6,127,975 6,127,975 2,026 6,125,949 — Held to maturity 88,839 100,041 — 100,041 — Other investments 75,253 75,523 — 75,523 — Loans held for sale 57,949 57,949 — 57,949 — Loans, net: Commercial and industrial 2,495,981 2,391,041 — 2,379,785 11,256 PPP 957,785 957,785 — 957,785 — Owner occupied commercial real estate 1,756,405 1,745,397 — 1,739,523 5,874 Non-owner occupied commercial real estate 1,900,608 1,892,213 — 1,887,306 4,907 Real estate construction 843,140 849,224 — 849,224 — Agricultural and agricultural real estate 707,397 697,729 — 685,278 12,451 Residential real estate 828,507 828,366 — 828,366 — Consumer 401,622 407,914 — 407,914 — Total Loans, net 9,891,445 9,769,669 — 9,735,181 34,488 Cash surrender value on life insurance 187,664 187,664 — 187,664 — Derivative financial instruments (1) 44,102 44,102 — 44,102 — Interest rate lock commitments 1,827 1,827 — — 1,827 Financial liabilities: Deposits Demand deposits 5,688,810 5,688,810 — 5,688,810 — Savings deposits 8,019,704 8,019,704 — 8,019,704 — Time deposits 1,271,391 1,273,468 — 1,273,468 — Short term borrowings 167,872 167,872 — 167,872 — Other borrowings 457,042 458,806 — 458,806 — Derivative financial instruments (1) 51,962 51,962 — 51,962 — Forward commitments 697 697 — 697 — (1) Includes embedded derivatives, back-to-back loan swaps and fair value hedges. (2) Includes cash flow hedges, fair value hedges, back-to-back loan swaps and free standing derivative instruments.

REVENUE (Tables)

REVENUE (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of noninterest income in-scope and out-of-scope of Topic 606	The following table presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and six months ended June 30, 2021, and 2020, in thousands: Three Months Ended Six Months Ended 2021 2020 2021 2020 In-scope of Topic 606 Service charges and fees Service charges and fees on deposit accounts $ 4,014 $ 3,476 $ 7,950 $ 6,913 Overdraft fees 2,549 1,634 5,141 4,443 Customer service and other service fees 54 35 100 94 Credit card fee income 5,854 4,067 10,162 7,967 Debit card income 2,661 1,760 5,450 3,576 Total service charges and fees 15,132 10,972 28,803 22,993 Trust fees 6,039 4,977 11,816 9,999 Brokerage and insurance commissions 865 595 1,718 1,328 Total noninterest income in-scope of Topic 606 22,036 16,544 42,337 34,320 Out-of-scope of Topic 606 Loan servicing income $ 873 $ 379 $ 1,711 $ 1,342 Securities gains, net 2,842 2,006 2,812 3,664 Unrealized gain/ (loss) on equity securities, net 83 680 (27) 449 Net gains on sale of loans held for sale 4,753 7,857 11,173 12,517 Valuation adjustment on servicing rights (526) 9 391 (1,556) Income on bank owned life insurance 937 1,167 1,766 1,665 Other noninterest income 2,166 1,995 3,318 4,053 Total noninterest income out-of-scope of Topic 606 11,128 14,093 21,144 22,134 Total noninterest income $ 33,164 $ 30,637 $ 63,481 $ 56,454

STOCK COMPENSATION (Tables)

STOCK COMPENSATION (Tables)	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Summary of Status of RSUs	A summary of the RSUs outstanding as of June 30, 2021, and June 30, 2020, and changes during the six months ended June 30, 2021 and 2020, follows: 2021 2020 Shares Weighted-Average Grant Date Shares Weighted-Average Grant Date Outstanding at January 1, 348,275 $ 38.22 254,383 $ 46.76 Granted 208,513 51.63 212,344 32.00 Vested (146,381) 40.89 (118,686) 44.52 Forfeited (18,861) 42.88 (14,648) 47.00 Outstanding at June 30, 391,546 $ 44.08 333,393 $ 38.55

BASIS OF PRESENTATION (Earnings

BASIS OF PRESENTATION (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share
Net income	$ 61,605	$ 30,131	$ 114,419	$ 50,171
Preferred dividends	(2,012)	0	(4,025)	0
Net income available to common stockholders	$ 59,593	$ 30,131	$ 110,394	$ 50,171
Weighted average common shares outstanding for basic earnings per share (in shares)	42,243	36,881	42,210	36,851
Assumed incremental common shares issued upon vesting of outstanding restricted stock units (in shares)	117	35	147	69
Weighted average common shares for diluted earnings per share (in shares)	42,360	36,916	42,357	36,920
Earnings per common share — basic (in dollars per share)	$ 1.41	$ 0.82	$ 2.62	$ 1.36
Earnings per common share — diluted (in dollars per share)	$ 1.41	$ 0.82	$ 2.61	$ 1.36
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation (in shares)	1	54	60	1

ACQUISITIONS (Details)

ACQUISITIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 04, 2020	Jun. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Assets acquired		$ 18,371,006	$ 17,908,339
Gross loans held to maturity		10,012,014	10,023,051
Deposits acquired		$ 15,615,118	$ 14,979,905
Share price (USD per share)	$ 41.89
Johnson Bank Branches | Arizona Bank & Trust
Business Acquisition [Line Items]
Assets acquired	$ 419,700
Gross loans held to maturity	150,700
Deposits acquired	415,500
AIM Bancshares, Inc.
Business Acquisition [Line Items]
Assets acquired	1,970,000
Gross loans held to maturity	1,090,000
Deposits acquired	$ 1,670,000
Number of shares issued In exchange per share (in shares)	$ 207
Share price (USD per share)	$ 1,887.16
Business combination, consideration transferred	$ 264,500
Consideration received, common stock	217,200
Payments to acquire businesses, gross	47,300
AIM Bancshares, Inc. | Holders Of In-The-Money Options
Business Acquisition [Line Items]
Consideration received, common stock	$ 4,900

SECURITIES (Securities availabl

SECURITIES (Securities available for sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gains	$ 118,254	$ 127,866
Gross Unrealized Losses	(37,959)	(24,116)
Equity securities with a readily determinable fair value	20,651	19,629
Amortized Cost, Total	6,463,683	6,024,225
Estimated Fair Value, Total	6,543,978	6,127,975
Total debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,443,032	6,004,596
Gross Unrealized Gains	118,254	127,866
Gross Unrealized Losses	(37,959)	(24,116)
Estimated Fair Value	6,523,327	6,108,346
U.S. treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	996	1,995
Gross Unrealized Gains	20	31
Gross Unrealized Losses	0	0
Estimated Fair Value	1,016	2,026
U.S. agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35,591	167,048
Gross Unrealized Gains	272	657
Gross Unrealized Losses	(492)	(926)
Estimated Fair Value	35,371	166,779
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,817,708	1,562,631
Gross Unrealized Gains	66,037	75,555
Gross Unrealized Losses	(11,959)	(2,959)
Estimated Fair Value	1,871,786	1,635,227
Mortgage-backed securities - agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,741,389	1,351,964
Gross Unrealized Gains	19,890	16,029
Gross Unrealized Losses	(20,604)	(12,723)
Estimated Fair Value	1,740,675	1,355,270
Mortgage-backed securities - non-agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,349,005	1,428,068
Gross Unrealized Gains	16,062	22,688
Gross Unrealized Losses	(1,775)	(1,640)
Estimated Fair Value	1,363,292	1,449,116
Commercial mortgage-backed securities - agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	124,441	171,451
Gross Unrealized Gains	2,439	3,440
Gross Unrealized Losses	(1,800)	(738)
Estimated Fair Value	125,080	174,153
Commercial mortgage-backed securities - non-agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	534,682	253,421
Gross Unrealized Gains	823	37
Gross Unrealized Losses	(200)	(691)
Estimated Fair Value	535,305	252,767
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	835,476	1,064,255
Gross Unrealized Gains	12,640	9,421
Gross Unrealized Losses	(1,129)	(4,410)
Estimated Fair Value	846,987	1,069,266
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,744	3,763
Gross Unrealized Gains	71	8
Gross Unrealized Losses	0	(29)
Estimated Fair Value	$ 3,815	$ 3,742

SECURITIES (Held to maturity se

SECURITIES (Held to maturity securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 85,490		$ 88,890
Gross Unrealized Gains	9,931		11,151
Gross Unrealized Losses	0		0
Estimated Fair Value	95,421		100,041
Allowance for Credit Losses	(51)		(51)
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	85,490		88,890
Gross Unrealized Gains	9,931		11,151
Gross Unrealized Losses	0		0
Estimated Fair Value	95,421		100,041
Allowance for Credit Losses	$ (51)	$ (48)	$ (51)	$ (62)	$ (197)	$ 0

SECURITIES (Narrative) (Details

SECURITIES (Narrative) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivable	$ 24,600,000	$ 20,800,000
Fair value of securities pledged	1,870,000,000	2,120,000,000
Securities held to maturity with unrealized losses	0	0
Amortized cost of FHLBs	$ 20,800,000	$ 19,500,000

SECURITIES (Securities availa_2

SECURITIES (Securities available for sale debt maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Amortized Cost
Due in 1 year or less	$ 13,286
Due in 1 to 5 years	18,199
Due in 5 to 10 years	198,036
Due after 10 years	1,628,518
Total debt securities	1,858,039
Mortgage and asset-backed securities	4,584,993
Equity securities with a readily determinable fair value	20,651	$ 19,629
Total investment securities	6,463,683
Estimated Fair Value
Due in 1 year or less	13,351
Due in 1 to 5 years	19,153
Due in 5 to 10 years	202,564
Due after 10 years	1,676,920
Total debt securities	1,911,988
Mortgage and asset-backed securities	4,611,339
Equity securities with a readily determinable fair value	20,651
Total investment securities	$ 6,543,978

SECURITIES (Securities held to

SECURITIES (Securities held to maturity debt maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Amortized Cost
Due in 1 year or less	$ 2,196
Due in 1 to 5 years	42,172
Due in 5 to 10 years	32,451
Due after 10 years	8,671
Amortized Cost	85,490	$ 88,890
Allowance for credit losses	(51)
Total investment securities	85,439	88,839
Estimated Fair Value
Due in 1 year or less	2,209
Due in 1 to 5 years	44,028
Due in 5 to 10 years	37,240
Due after 10 years	11,944
Estimated Fair Value	95,421	$ 100,041
Allowance for credit losses	0
Total investment securities	$ 95,421

SECURITIES (Gross realized gain

SECURITIES (Gross realized gain (loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 423,415	$ 182,749	$ 630,481	$ 511,639
Gross security gains	3,844	3,958	4,289	6,862
Gross security losses	$ 1,002	$ 1,952	$ 1,477	$ 3,198

SECURITIES (Debt securities ava

SECURITIES (Debt securities available for sale) (Details) $ in Thousands	Jun. 30, 2021USD ($)bankLocation	Dec. 31, 2020USD ($)bankLocation
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 2,324,495	$ 1,672,530
Unrealized Losses, Less than 12 months	$ (35,342)	$ (18,373)
Count, Less than 12 months | bankLocation	196	127
Fair Value, 12 months or longer	$ 129,627	$ 508,436
Unrealized Losses, 12 months or longer	$ (2,617)	$ (5,743)
Count, 12 months or longer | bankLocation	24	103
Fair Value, Total	$ 2,454,122	$ 2,180,966
Unrealized Losses, Total	$ (37,959)	$ (24,116)
Count, Total | bankLocation	220	230
U.S. agencies
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 18,983	$ 2,981
Unrealized Losses, Less than 12 months	$ (492)	$ (8)
Count, Less than 12 months | bankLocation	1	5
Fair Value, 12 months or longer	$ 0	$ 99,922
Unrealized Losses, 12 months or longer	$ 0	$ (918)
Count, 12 months or longer | bankLocation	0	72
Fair Value, Total	$ 18,983	$ 102,903
Unrealized Losses, Total	$ (492)	$ (926)
Count, Total | bankLocation	1	77
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 591,597	$ 346,598
Unrealized Losses, Less than 12 months	$ (11,887)	$ (2,959)
Count, Less than 12 months | bankLocation	107	49
Fair Value, 12 months or longer	$ 6,719	$ 0
Unrealized Losses, 12 months or longer	$ (72)	$ 0
Count, 12 months or longer | bankLocation	2	0
Fair Value, Total	$ 598,316	$ 346,598
Unrealized Losses, Total	$ (11,959)	$ (2,959)
Count, Total | bankLocation	109	49
Mortgage-backed securities - agency
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 1,025,619	$ 653,793
Unrealized Losses, Less than 12 months	$ (19,499)	$ (12,342)
Count, Less than 12 months | bankLocation	58	35
Fair Value, 12 months or longer	$ 37,181	$ 31,012
Unrealized Losses, 12 months or longer	$ (1,105)	$ (381)
Count, 12 months or longer | bankLocation	4	3
Fair Value, Total	$ 1,062,800	$ 684,805
Unrealized Losses, Total	$ (20,604)	$ (12,723)
Count, Total | bankLocation	62	38
Mortgage-backed securities - non-agency
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 541,131	$ 378,843
Unrealized Losses, Less than 12 months	$ (1,345)	$ (1,639)
Count, Less than 12 months | bankLocation	12	17
Fair Value, 12 months or longer	$ 33,988	$ 1,622
Unrealized Losses, 12 months or longer	$ (430)	$ (1)
Count, 12 months or longer | bankLocation	5	1
Fair Value, Total	$ 575,119	$ 380,465
Unrealized Losses, Total	$ (1,775)	$ (1,640)
Count, Total | bankLocation	17	18
Commercial mortgage-backed securities - agency
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 69,690	$ 46,541
Unrealized Losses, Less than 12 months	$ (1,800)	$ (738)
Count, Less than 12 months | bankLocation	11	6
Fair Value, 12 months or longer	$ 0	$ 0
Unrealized Losses, 12 months or longer	$ 0	$ 0
Count, 12 months or longer | bankLocation	0	0
Fair Value, Total	$ 69,690	$ 46,541
Unrealized Losses, Total	$ (1,800)	$ (738)
Count, Total | bankLocation	11	6
Commercial mortgage-backed securities - non-agency
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 0	$ 100,042
Unrealized Losses, Less than 12 months	$ 0	$ (15)
Count, Less than 12 months | bankLocation	0	2
Fair Value, 12 months or longer	$ 15,960	$ 35,428
Unrealized Losses, 12 months or longer	$ (200)	$ (676)
Count, 12 months or longer | bankLocation	2	3
Fair Value, Total	$ 15,960	$ 135,470
Unrealized Losses, Total	$ (200)	$ (691)
Count, Total | bankLocation	2	5
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 77,475	$ 141,824
Unrealized Losses, Less than 12 months	$ (319)	$ (643)
Count, Less than 12 months | bankLocation	7	9
Fair Value, 12 months or longer	$ 35,779	$ 340,452
Unrealized Losses, 12 months or longer	$ (810)	$ (3,767)
Count, 12 months or longer | bankLocation	11	24
Fair Value, Total	$ 113,254	$ 482,276
Unrealized Losses, Total	$ (1,129)	$ (4,410)
Count, Total | bankLocation	18	33
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 0	$ 1,908
Unrealized Losses, Less than 12 months	$ 0	$ (29)
Count, Less than 12 months | bankLocation	0	4
Fair Value, 12 months or longer	$ 0	$ 0
Unrealized Losses, 12 months or longer	$ 0	$ 0
Count, 12 months or longer | bankLocation	0	0
Fair Value, Total	$ 0	$ 1,908
Unrealized Losses, Total	$ 0	$ (29)
Count, Total | bankLocation	0	4

SECURITIES (Schedule of allowan

SECURITIES (Schedule of allowance for credit loss for securities held to maturity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 51
Ending balance	$ 51		51
Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	48	$ 197	51	$ 0
Provision (benefit) for credit losses	3	(135)	0	(96)
Ending balance	$ 51	$ 62	51	62
Obligations of states and political subdivisions | Impact of ASU 2016-13 adoption
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance			0	158
Obligations of states and political subdivisions | Adjusted balance at January 1, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 51	$ 158

SECURITIES (Schedule of financi

SECURITIES (Schedule of financing receivable credit quality indicators) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 85,490	$ 88,890
Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	85,490	88,890
Standard & Poor's, AAA Rating | Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	3,207	0
Standard & Poor's, AA, AA+, AA- | Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	62,526	64,385
Standard & Poor's, A+, A, A- Rating | Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	15,006	18,353
Standard & Poor's, BBB Rating | Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	4,751	4,208
Standard & Poor's, Not Rated | Obligations of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0	$ 1,944

LOANS (Loans receivable) (Detai

LOANS (Loans receivable) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Loans and Leases [Line Items]
Held to maturity	$ 10,012,014		$ 10,023,051
Allowance for credit losses	(120,726)	$ (130,172)	(131,606)	$ (119,937)	$ (97,350)	$ (70,395)
Loans receivable, net	9,891,288		9,891,445
Accrued interest receivable	37,700		42,400
Commercial and industrial | Commercial and industrial
Loans and Leases [Line Items]
Held to maturity	2,518,908		2,534,799
Allowance for credit losses	(31,332)	(36,095)	(38,818)	(32,518)	(32,455)	(34,207)
Commercial and industrial | Paycheck Protection Program ("PPP")
Loans and Leases [Line Items]
Held to maturity	829,175		957,785
Allowance for credit losses	0	0	0	0	0	0
Commercial and industrial | Owner occupied commercial real estate
Loans and Leases [Line Items]
Held to maturity	1,940,134		1,776,406
Allowance for credit losses	(19,990)	(19,416)	(20,001)	(23,402)	(10,337)	(7,921)
Commercial and industrial | Non-owner occupied commercial real estate
Loans and Leases [Line Items]
Held to maturity	1,987,369		1,921,481
Allowance for credit losses	(22,828)	(24,694)	(20,873)	(10,161)	(8,320)	(7,584)
Commercial and industrial | Real estate construction
Loans and Leases [Line Items]
Held to maturity	854,295		863,220
Allowance for credit losses	(19,580)	(19,931)	(20,080)	(28,667)	(22,951)	(8,677)
Agricultural and agricultural real estate
Loans and Leases [Line Items]
Held to maturity	679,608		714,526
Allowance for credit losses	(7,160)	(7,111)	(7,129)	(5,701)	(4,797)	(5,680)
Residential real estate
Loans and Leases [Line Items]
Held to maturity	800,884		840,442
Allowance for credit losses	(9,741)	(11,012)	(11,935)	(9,304)	(8,725)	(1,504)
Consumer
Loans and Leases [Line Items]
Held to maturity	401,641		414,392
Allowance for credit losses	$ (10,095)	$ (11,913)	$ (12,770)	$ (10,184)	$ (9,765)	$ (4,822)

LOANS (Financing receivables, n

LOANS (Financing receivables, non accrual status narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Total exposure on lending relationships (or more)	$ 0.5
Troubled debt restructured loans	13.7	$ 6.2
Nonperforming
Financing Receivable, Nonaccrual [Line Items]
Troubled debt restructured loans	11.6	3.8
Performing
Financing Receivable, Nonaccrual [Line Items]
Troubled debt restructured loans	$ 2.1	$ 2.4

LOANS (Allowance for credit los

LOANS (Allowance for credit losses on financing receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	$ 11,389		$ 9,426
Collectively Evaluated for Credit Losses	109,337		122,180
Total	120,726	$ 130,172	131,606	$ 119,937	$ 97,350	$ 70,395
Loans Individually Evaluated for Credit Losses	58,701		57,230
Loans Collectively Evaluated for Credit Losses	9,953,313		9,965,821
Total	10,012,014		10,023,051
Commercial and industrial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	4,688		4,077
Collectively Evaluated for Credit Losses	26,644		34,741
Total	31,332	36,095	38,818	32,518	32,455	34,207
Loans Individually Evaluated for Credit Losses	13,658		16,578
Loans Collectively Evaluated for Credit Losses	2,505,250		2,518,221
Total	2,518,908		2,534,799
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	0		0
Total	0	0	0	0	0	0
Loans Individually Evaluated for Credit Losses	0		0
Loans Collectively Evaluated for Credit Losses	829,175		957,785
Total	829,175		957,785
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	110		111
Collectively Evaluated for Credit Losses	19,880		19,890
Total	19,990	19,416	20,001	23,402	10,337	7,921
Loans Individually Evaluated for Credit Losses	7,547		11,174
Loans Collectively Evaluated for Credit Losses	1,932,587		1,765,232
Total	1,940,134		1,776,406
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	3,485		3,250
Collectively Evaluated for Credit Losses	19,343		17,623
Total	22,828	24,694	20,873	10,161	8,320	7,584
Loans Individually Evaluated for Credit Losses	19,548		13,490
Loans Collectively Evaluated for Credit Losses	1,967,821		1,907,991
Total	1,987,369		1,921,481
Commercial and industrial | Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	19,580		20,080
Total	19,580	19,931	20,080	28,667	22,951	8,677
Loans Individually Evaluated for Credit Losses	0		0
Loans Collectively Evaluated for Credit Losses	854,295		863,220
Total	854,295		863,220
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	3,106		1,988
Collectively Evaluated for Credit Losses	4,054		5,141
Total	7,160	7,111	7,129	5,701	4,797	5,680
Loans Individually Evaluated for Credit Losses	17,948		15,453
Loans Collectively Evaluated for Credit Losses	661,660		699,073
Total	679,608		714,526
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	9,741		11,935
Total	9,741	11,012	11,935	9,304	8,725	1,504
Loans Individually Evaluated for Credit Losses	0		535
Loans Collectively Evaluated for Credit Losses	800,884		839,907
Total	800,884		840,442
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	10,095		12,770
Total	10,095	$ 11,913	12,770	$ 10,184	$ 9,765	$ 4,822
Loans Individually Evaluated for Credit Losses	0		0
Loans Collectively Evaluated for Credit Losses	401,641		414,392
Total	$ 401,641		$ 414,392

LOANS (Troubled debt restructur

LOANS (Troubled debt restructuring) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)loan	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	1	2	2
Pre- Modification Recorded Investment	$ 7,850	$ 60	$ 7,850	$ 92
Post- Modification Recorded Investment	$ 7,850	$ 66	$ 7,850	$ 98
Commercial and industrial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	0	2	0
Pre- Modification Recorded Investment	$ 7,850	$ 0	$ 7,850	$ 0
Post- Modification Recorded Investment	$ 7,850	$ 0	$ 7,850	$ 0
Commercial and industrial | Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Agricultural and agricultural real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	1	0	2
Pre- Modification Recorded Investment	$ 0	$ 60	$ 0	$ 92
Post- Modification Recorded Investment	$ 0	$ 66	$ 0	$ 98
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post- Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0

LOANS (Troubled debt narrative)

LOANS (Troubled debt narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)	Dec. 31, 2020loan
Financing Receivable, Credit Quality Indicator [Line Items]
Troubled debt restructured loans modified during the twelve-month period prior to default | $	$ 0	$ 0	$ 0	$ 0
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Number of loan relationships | loan	0		0		0

LOANS (Loans by credit quality

LOANS (Loans by credit quality indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	$ 1,834,679	$ 3,119,680
Year Two	2,324,723	1,842,640
Year Three	1,571,546	1,287,023
Year Four	1,002,180	842,221
Year Five	708,286	485,454
Year Six and Prior	1,460,074	1,254,784
Revolving	1,110,526	1,191,249
Total	10,012,014	10,023,051
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,728,870	2,847,203
Year Two	2,145,073	1,649,219
Year Three	1,385,032	1,131,756
Year Four	822,200	727,712
Year Five	611,204	408,380
Year Six and Prior	1,252,266	1,091,908
Revolving	1,028,900	1,084,202
Total	8,973,545	8,940,380
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	51,153	129,037
Year Two	96,359	141,385
Year Three	133,447	80,970
Year Four	115,109	58,813
Year Five	39,400	44,512
Year Six and Prior	92,669	76,144
Revolving	48,662	74,056
Total	576,799	604,917
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	54,656	143,440
Year Two	83,291	52,036
Year Three	53,067	74,297
Year Four	64,871	55,696
Year Five	57,682	32,562
Year Six and Prior	115,139	86,732
Revolving	32,964	32,991
Total	461,670	477,754
Commercial and industrial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	340,049	622,451
Year Two	510,280	381,759
Year Three	311,720	197,442
Year Four	144,216	245,675
Year Five	217,956	118,180
Year Six and Prior	410,116	359,845
Revolving	584,571	609,447
Total	2,518,908	2,534,799
Commercial and industrial | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	330,626	557,853
Year Two	475,749	340,809
Year Three	277,874	168,873
Year Four	122,550	215,696
Year Five	197,617	101,010
Year Six and Prior	370,896	337,834
Revolving	528,785	541,627
Total	2,304,097	2,263,702
Commercial and industrial | Commercial and industrial | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	7,252	41,574
Year Two	13,154	24,676
Year Three	22,947	19,672
Year Four	12,886	14,262
Year Five	8,633	8,072
Year Six and Prior	17,574	2,474
Revolving	35,506	49,432
Total	117,952	160,162
Commercial and industrial | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	2,171	23,024
Year Two	21,377	16,274
Year Three	10,899	8,897
Year Four	8,780	15,717
Year Five	11,706	9,098
Year Six and Prior	21,646	19,537
Revolving	20,280	18,388
Total	96,859	110,935
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	452,499	957,785
Year Two	376,676	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Year Six and Prior	0	0
Revolving	0	0
Total	829,175	957,785
Commercial and industrial | Paycheck Protection Program ("PPP") | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	409,922	880,709
Year Two	327,475	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Year Six and Prior	0	0
Revolving	0	0
Total	737,397	880,709
Commercial and industrial | Paycheck Protection Program ("PPP") | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	21,880	22,533
Year Two	28,769	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Year Six and Prior	0	0
Revolving	0	0
Total	50,649	22,533
Commercial and industrial | Paycheck Protection Program ("PPP") | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	20,697	54,543
Year Two	20,432	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Year Six and Prior	0	0
Revolving	0	0
Total	41,129	54,543
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	332,268	431,921
Year Two	438,297	392,687
Year Three	399,547	334,894
Year Four	258,685	202,428
Year Five	177,464	124,531
Year Six and Prior	302,696	250,770
Revolving	31,177	39,175
Total	1,940,134	1,776,406
Commercial and industrial | Owner occupied commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	331,097	400,662
Year Two	402,216	369,401
Year Three	371,104	300,242
Year Four	232,062	167,470
Year Five	143,692	107,234
Year Six and Prior	264,190	213,780
Revolving	27,773	33,759
Total	1,772,134	1,592,548
Commercial and industrial | Owner occupied commercial real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	428	15,345
Year Two	17,998	13,764
Year Three	14,979	22,488
Year Four	18,715	20,811
Year Five	19,869	8,717
Year Six and Prior	10,305	15,282
Revolving	2,250	4,311
Total	84,544	100,718
Commercial and industrial | Owner occupied commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	743	15,914
Year Two	18,083	9,522
Year Three	13,464	12,164
Year Four	7,908	14,147
Year Five	13,903	8,580
Year Six and Prior	28,201	21,708
Revolving	1,154	1,105
Total	83,456	83,140
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	240,775	388,447
Year Two	364,678	481,561
Year Three	452,771	353,464
Year Four	329,968	229,871
Year Five	196,082	138,171
Year Six and Prior	365,921	299,885
Revolving	37,174	30,082
Total	1,987,369	1,921,481
Commercial and industrial | Non-owner occupied commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	206,934	334,722
Year Two	332,479	411,301
Year Three	355,445	305,456
Year Four	275,853	194,101
Year Five	163,047	108,070
Year Six and Prior	266,547	233,153
Revolving	32,340	24,466
Total	1,632,645	1,611,269
Commercial and industrial | Non-owner occupied commercial real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	16,873	22,826
Year Two	18,884	55,225
Year Three	76,447	24,718
Year Four	30,786	18,724
Year Five	8,233	20,954
Year Six and Prior	53,339	45,672
Revolving	4,524	5,114
Total	209,086	193,233
Commercial and industrial | Non-owner occupied commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	16,968	30,899
Year Two	13,315	15,035
Year Three	20,879	23,290
Year Four	23,329	17,046
Year Five	24,802	9,147
Year Six and Prior	46,035	21,060
Revolving	310	502
Total	145,638	116,979
Commercial and industrial | Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	151,473	313,926
Year Two	339,966	339,097
Year Three	226,957	161,610
Year Four	98,813	12,957
Year Five	10,243	7,048
Year Six and Prior	9,352	5,856
Revolving	17,491	22,726
Total	854,295	863,220
Commercial and industrial | Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	151,473	311,625
Year Two	338,101	309,678
Year Three	215,455	157,171
Year Four	49,360	12,625
Year Five	10,003	6,954
Year Six and Prior	8,959	5,110
Revolving	17,078	21,431
Total	790,429	824,594
Commercial and industrial | Real estate construction | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	2,105
Year Two	1,865	26,659
Year Three	11,474	2,403
Year Four	47,460	332
Year Five	240	55
Year Six and Prior	210	388
Revolving	413	1,295
Total	61,662	33,237
Commercial and industrial | Real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	0	196
Year Two	0	2,760
Year Three	28	2,036
Year Four	1,993	0
Year Five	0	39
Year Six and Prior	183	358
Revolving	0	0
Total	2,204	5,389
Agricultural and agricultural real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	127,849	209,481
Year Two	148,148	114,190
Year Three	91,789	94,722
Year Four	69,393	48,458
Year Five	34,002	25,058
Year Six and Prior	58,295	50,805
Revolving	150,132	171,812
Total	679,608	714,526
Agricultural and agricultural real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	115,287	171,578
Year Two	125,764	90,944
Year Three	79,157	62,349
Year Four	46,698	39,252
Year Five	28,105	17,626
Year Six and Prior	43,350	37,696
Revolving	134,975	148,456
Total	573,336	567,901
Agricultural and agricultural real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	3,480	20,500
Year Two	13,591	16,202
Year Three	5,746	8,854
Year Four	2,197	2,448
Year Five	256	3,515
Year Six and Prior	3,735	3,157
Revolving	4,735	12,282
Total	33,740	66,958
Agricultural and agricultural real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	9,082	17,403
Year Two	8,793	7,044
Year Three	6,886	23,519
Year Four	20,498	6,758
Year Five	5,641	3,917
Year Six and Prior	11,210	9,952
Revolving	10,422	11,074
Total	72,532	79,667
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	149,429	157,983
Year Two	119,396	104,389
Year Three	67,773	123,549
Year Four	86,122	86,958
Year Five	59,926	67,478
Year Six and Prior	289,994	265,518
Revolving	28,244	34,567
Total	800,884	840,442
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	144,046	153,017
Year Two	116,571	99,440
Year Three	65,840	118,854
Year Four	82,530	83,534
Year Five	56,628	63,477
Year Six and Prior	277,236	244,852
Revolving	28,244	33,467
Total	771,095	796,641
Residential real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	1,236	3,986
Year Two	1,966	4,507
Year Three	1,634	2,188
Year Four	1,703	1,896
Year Five	2,039	3,117
Year Six and Prior	6,998	8,525
Revolving	0	0
Total	15,576	24,219
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	4,147	980
Year Two	859	442
Year Three	299	2,507
Year Four	1,889	1,528
Year Five	1,259	884
Year Six and Prior	5,760	12,141
Revolving	0	1,100
Total	14,213	19,582
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	40,337	37,686
Year Two	27,282	28,957
Year Three	20,989	21,342
Year Four	14,983	15,874
Year Five	12,613	4,988
Year Six and Prior	23,700	22,105
Revolving	261,737	283,440
Total	401,641	414,392
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	39,485	37,037
Year Two	26,718	27,646
Year Three	20,157	18,811
Year Four	13,147	15,034
Year Five	12,112	4,009
Year Six and Prior	21,088	19,483
Revolving	259,705	280,996
Total	392,412	403,016
Consumer | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	4	168
Year Two	132	352
Year Three	220	647
Year Four	1,362	340
Year Five	130	82
Year Six and Prior	508	646
Revolving	1,234	1,622
Total	3,590	3,857
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	848	481
Year Two	432	959
Year Three	612	1,884
Year Four	474	500
Year Five	371	897
Year Six and Prior	2,104	1,976
Revolving	798	822
Total	$ 5,639	$ 7,519

LOANS (Loans by credit qualit_2

LOANS (Loans by credit quality indicator narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity	$ 10,012,014,000		$ 10,012,014,000			$ 10,023,051,000
Allowance for credit loss	120,726,000	$ 119,937,000	120,726,000	$ 119,937,000	$ 130,172,000	$ 131,606,000	$ 97,350,000	$ 70,395,000
Loans secured by residential real estate property in process of foreclosure	$ 1,700,000		$ 1,700,000
Loans delinquent 30 to 89 days, percentage	0.17%		0.17%			0.23%
Interest income on nonaccrual loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual loans with no related allowance	24,000,000		24,000,000			$ 32,500,000
Nonpass | Paycheck Protection Program ("PPP")
Financing Receivable, Credit Quality Indicator [Line Items]
Held to maturity	91,800,000		91,800,000			$ 77,100,000
Allowance for credit loss	$ 0		$ 0

LOANS (Past due financing recei

LOANS (Past due financing receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 17,046	$ 23,601
Current	9,909,700	9,912,064
Nonaccrual	85,268	87,386
Total	10,012,014	10,023,051
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	12,509	17,400
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	4,440	5,481
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	97	720
Commercial and industrial | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	2,583	8,867
Current	2,498,207	2,504,170
Nonaccrual	18,118	21,762
Total	2,518,908	2,534,799
Commercial and industrial | Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,537	5,825
Commercial and industrial | Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,034	2,322
Commercial and industrial | Commercial and industrial | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	12	720
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Past Due [Line Items]
Total Past Due	0	1
Current	829,175	957,784
Nonaccrual	0	0
Total	829,175	957,785
Commercial and industrial | Paycheck Protection Program ("PPP") | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	1
Commercial and industrial | Paycheck Protection Program ("PPP") | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial | Paycheck Protection Program ("PPP") | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	1,134	2,982
Current	1,929,086	1,759,649
Nonaccrual	9,914	13,775
Total	1,940,134	1,776,406
Commercial and industrial | Owner occupied commercial real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,134	2,815
Commercial and industrial | Owner occupied commercial real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	167
Commercial and industrial | Owner occupied commercial real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	2,724	4,817
Current	1,963,775	1,902,003
Nonaccrual	20,870	14,661
Total	1,987,369	1,921,481
Commercial and industrial | Non-owner occupied commercial real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,374	2,143
Commercial and industrial | Non-owner occupied commercial real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,350	2,674
Commercial and industrial | Non-owner occupied commercial real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Commercial and industrial | Real estate construction
Financing Receivable, Past Due [Line Items]
Total Past Due	2,834	2,542
Current	851,053	859,784
Nonaccrual	408	894
Total	854,295	863,220
Commercial and industrial | Real estate construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,834	2,446
Commercial and industrial | Real estate construction | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	96
Commercial and industrial | Real estate construction | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Agricultural and agricultural real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	4,475	1,688
Current	654,135	694,150
Nonaccrual	20,998	18,688
Total	679,608	714,526
Agricultural and agricultural real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,759	1,688
Agricultural and agricultural real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,716	0
Agricultural and agricultural real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	2,395	1,758
Current	785,637	825,047
Nonaccrual	12,852	13,637
Total	800,884	840,442
Residential real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	2,192	1,675
Residential real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	118	83
Residential real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	85	0
Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	901	946
Current	398,632	409,477
Nonaccrual	2,108	3,969
Total	401,641	414,392
Consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	679	807
Consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	222	139
Consumer | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 0	$ 0

LOANS (Carrying amount of loans

LOANS (Carrying amount of loans acquired narrative) (Details) $ in Millions	Dec. 04, 2020USD ($)
Johnson Bank Branches
Business Acquisition [Line Items]
Estimated fair value of loans acquired	$ 150.7
AIM Bancshares, Inc.
Business Acquisition [Line Items]
Estimated fair value of loans acquired	$ 1,090

ALLOWANCE FOR CREDIT LOSSES (De

ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 130,172	$ 97,350	$ 131,606	$ 70,395
Charge-offs	(3,497)	(3,564)	(5,623)	(9,865)
Recoveries	517	1,144	1,193	2,464
Provision	(6,466)	25,007	(6,450)	44,872
Ending Balance	120,726	119,937	120,726	119,937
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	14,619	15,468	15,280	248
Provision	(617)	1,924	(1,278)	3,540
Ending balance	14,002	17,392	14,002	17,392
Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				12,071
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance			0	13,604
Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				82,466
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance			15,280	13,852
Agricultural and Agricultural Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,111	4,797	7,129	5,680
Charge-offs	(357)	(1)	(675)	(254)
Recoveries	0	0	21	826
Provision	406	905	685	(164)
Ending Balance	7,160	5,701	7,160	5,701
Agricultural and Agricultural Real Estate | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				(387)
Agricultural and Agricultural Real Estate | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				5,293
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	11,012	8,725	11,935	1,504
Charge-offs	(70)	(235)	(91)	(314)
Recoveries	0	92	5	95
Provision	(1,201)	722	(2,108)	3,202
Ending Balance	9,741	9,304	9,741	9,304
Residential Real Estate | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				4,817
Residential Real Estate | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				6,321
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	11,913	9,765	12,770	4,822
Charge-offs	(509)	(476)	(1,307)	(1,193)
Recoveries	191	298	493	518
Provision	(1,500)	597	(1,861)	1,728
Ending Balance	10,095	10,184	10,095	10,184
Consumer | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				4,309
Consumer | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				9,131
Commercial and Industrial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,095	32,455	38,818	34,207
Charge-offs	(842)	(2,536)	(1,790)	(7,767)
Recoveries	265	345	558	610
Provision	(4,186)	2,254	(6,254)	5,740
Ending Balance	31,332	32,518	31,332	32,518
Commercial and Industrial | Commercial and industrial | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				(272)
Commercial and Industrial | Commercial and industrial | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				33,935
Paycheck Protection Program ("PPP") | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	0	0	0
Ending Balance	0	0	0	0
Paycheck Protection Program ("PPP") | Commercial and industrial | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				0
Paycheck Protection Program ("PPP") | Commercial and industrial | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				0
Owner occupied commercial real estate | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	19,416	10,337	20,001	7,921
Charge-offs	(72)	(213)	(113)	(213)
Recoveries	44	191	97	192
Provision	602	13,087	5	15,616
Ending Balance	19,990	23,402	19,990	23,402
Owner occupied commercial real estate | Commercial and industrial | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				(114)
Owner occupied commercial real estate | Commercial and industrial | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				7,807
Non-owner occupied commercial real estate | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	24,694	8,320	20,873	7,584
Charge-offs	(1,637)	(19)	(1,637)	(19)
Recoveries	13	8	13	8
Provision	(242)	1,852	3,579	5,205
Ending Balance	22,828	10,161	22,828	10,161
Non-owner occupied commercial real estate | Commercial and industrial | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				(2,617)
Non-owner occupied commercial real estate | Commercial and industrial | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				4,967
Real Estate Construction | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	19,931	22,951	20,080	8,677
Charge-offs	(10)	(84)	(10)	(105)
Recoveries	4	210	6	215
Provision	(345)	5,590	(496)	13,545
Ending Balance	$ 19,580	$ 28,667	$ 19,580	28,667
Real Estate Construction | Commercial and industrial | Impact of ASU 2016-13 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				6,335
Real Estate Construction | Commercial and industrial | Adjusted balance at January 1, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance				$ 15,012

GOODWILL, CORE DEPOSIT PREMIU_3

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Goodwill narrative) (Details) - USD ($)	Dec. 04, 2020	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill			$ 576,005,000	$ 576,005,000
Goodwill impairment		$ 0
AIM Bancshares, Inc.
Goodwill [Line Items]
Goodwill	$ 91,400,000
AIM Bancshares, Inc. | Core Deposits
Goodwill [Line Items]
Intangibles recognized	$ 3,100,000
Intangibles, amortization period	10 years
Johnson Bank Branches
Goodwill [Line Items]
Goodwill	$ 38,400,000
Johnson Bank Branches | Core Deposits
Goodwill [Line Items]
Intangibles recognized	$ 1,300,000
Intangibles, amortization period	10 years

GOODWILL, CORE DEPOSIT PREMIU_4

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Carrying amount of intangible assets (incl accumulated amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 121,387	$ 120,684
Accumulated Amortization	77,734	72,249
Net Carrying Amount	43,653	48,435
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	101,185	101,185
Accumulated Amortization	63,883	58,970
Net Carrying Amount	37,302	42,215
Customer relationship intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,177	1,177
Accumulated Amortization	1,027	1,009
Net Carrying Amount	150	168
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,971	11,268
Accumulated Amortization	6,412	6,079
Net Carrying Amount	5,559	5,189
Commercial servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,054	7,054
Accumulated Amortization	6,412	6,191
Net Carrying Amount	$ 642	$ 863

GOODWILL, CORE DEPOSIT PREMIU_5

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Estimated future amortization expense for amortizable intangible assets) (Details) $ in Thousands	Jun. 30, 2021USD ($)
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2021	$ 5,222
Year ending December 31,
2022	9,158
2023	7,963
2024	6,597
2025	5,537
2026	4,059
Thereafter	5,117
Total	43,653
Core Deposit Intangibles
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2021	4,446
Year ending December 31,
2022	7,702
2023	6,739
2024	5,591
2025	4,700
2026	3,533
Thereafter	4,591
Total	37,302
Customer Relationship Intangibles
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2021	18
Year ending December 31,
2022	34
2023	33
2024	33
2025	32
2026	0
Thereafter	0
Total	150
Mortgage Servicing Rights
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2021	648
Year ending December 31,
2022	1,228
2023	1,052
2024	877
2025	702
2026	526
Thereafter	526
Total	5,559
Commercial Servicing Rights
Future amortization expense for amortizable intangible assets [Line Items]
Six months ending December 31, 2021	110
Year ending December 31,
2022	194
2023	139
2024	96
2025	103
2026	0
Thereafter	0
Total	$ 642

GOODWILL, CORE DEPOSIT PREMIU_6

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Mortgage and commercial loans servicing narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Valuation servicing rights in tranches [Line Items]
Mortgage loans serviced for others	$ 719,600,000		$ 719,600,000		$ 743,300,000
Custodial escrow balances maintained	13,100,000		13,100,000		5,700,000
Loans guaranteed and sold with servicing retained	6,201,000		6,201,000		6,052,000
Valuation allowance			1,900,000
Mortgage servicing rights
Valuation servicing rights in tranches [Line Items]
Fair value of mortgage servicing rights	5,600,000		$ 5,600,000		$ 5,200,000
Average constant prepayment rate			15.90%		16.20%
Servicing assets, discount rate			9.02%		9.02%
Fees collected for servicing of mortgage loans	$ 459,000	$ 410,000	$ 923,000	$ 819,000
Mortgage servicing rights | Measurement Input, Cap Rate | Minimum
Valuation servicing rights in tranches [Line Items]
Average capitalization rate (percent)	0.0079	0.0076	0.0079	0.0076
Mortgage servicing rights | Measurement Input, Cap Rate | Maximum
Valuation servicing rights in tranches [Line Items]
Average capitalization rate (percent)	0.0120	0.0116	0.0120	0.0116
Commercial servicing rights
Valuation servicing rights in tranches [Line Items]
Fair value of mortgage servicing rights	$ 1,104,000	$ 1,417,000	$ 1,104,000	$ 1,417,000	$ 1,300,000
Fees collected for servicing of mortgage loans	165,000	$ 54,000	294,000	$ 172,000
Loans guaranteed and sold with servicing retained	57,500,000		$ 57,500,000		$ 66,200,000
Commercial servicing rights | Minimum
Valuation servicing rights in tranches [Line Items]
Average constant prepayment rate			13.70%		14.95%
Servicing assets, discount rate			5.70%		7.70%
Commercial servicing rights | Maximum
Valuation servicing rights in tranches [Line Items]
Average constant prepayment rate			17.49%		19.25%
Servicing assets, discount rate			9.96%		12.88%
Commercial servicing rights | Measurement Input, Cap Rate | Minimum
Valuation servicing rights in tranches [Line Items]
Average capitalization rate (percent)					0.0310
Commercial servicing rights | Measurement Input, Cap Rate | Maximum
Valuation servicing rights in tranches [Line Items]
Average capitalization rate (percent)					0.0445
Mortgage Servicing Rights 15-year Tranche
Valuation servicing rights in tranches [Line Items]
Valuation allowance			$ 470,000		$ 422,000
Amortization period			15 years
Mortgage Servicing Rights 30-year Tranche
Valuation servicing rights in tranches [Line Items]
Valuation allowance					1,400,000
Amortization period			30 years
Less Than 20 Years
Valuation servicing rights in tranches [Line Items]
Fair value of mortgage servicing rights	170,000		$ 170,000		203,000
Period of tranche			20 years
Valuation allowance			$ 0		$ 0
Amortization period			20 years		20 years
More Than 20 Years
Valuation servicing rights in tranches [Line Items]
Fair value of mortgage servicing rights	$ 934,000		$ 934,000		$ 1,085,000
Period of tranche			20 years
Valuation allowance			$ 0		$ 0
Amortization period			20 years		20 years

GOODWILL, CORE DEPOSIT PREMIU_7

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Changes in capitalized mortgage and commercial servicing rights) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	$ 5,189	$ 5,621
Originations	703	1,490
Amortization	(724)	(1,070)
Valuation adjustment	391	(1,556)
Balance at end of period	5,559	$ 4,485
Fair value of mortgage servicing rights	$ 5,600		$ 5,200
Servicing rights, net to servicing portfolio	0.77%	0.68%
Commercial servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	$ 863	$ 1,115
Originations	0	38
Amortization	(221)	(169)
Balance at end of period	642	984
Fair value of mortgage servicing rights	$ 1,104	$ 1,417	$ 1,300
Servicing rights, net to servicing portfolio	1.12%	1.32%

GOODWILL, CORE DEPOSIT PREMIU_8

GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Book value, fair value of commercial serving rights and impairment) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Valuation Allowance	$ 1,900,000
15 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	1,627,000	$ 1,522,000
Fair Value	1,157,000	1,100,000
Valuation Allowance	470,000	422,000
30 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	6,287,000	5,445,000
Fair Value	4,402,000	4,089,000
Valuation Allowance	1,885,000	1,356,000
Less Than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	58,000	87,000
Fair Value	170,000	203,000
Valuation Allowance	0	0
More Than 20 Years
Finite-Lived Intangible Assets [Line Items]
Book Value	584,000	776,000
Fair Value	934,000	1,085,000
Valuation Allowance	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS (Cash collateral on derivative financial instruments narrative) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash pledged as collateral	$ 2,900,000	$ 3,800,000
Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUME_4

DERIVATIVE FINANCIAL INSTRUMENTS (Cash flow hedges narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	May 18, 2018
Derivative [Line Items]
Change in net unrealized losses and reclassification from AOCI to interest expense on cash flow hedges	$ 1.8
Estimated amount to be reclassified from accumulated other comprehensive income to interest expense	2.4
Interest Rate Swaps | Cash Flow Hedges
Derivative [Line Items]
Derivative, notional amount	40		$ 9
Interest Rate Swaps | Cash Flow Hedges | Heartland Financial Statutory Trust IV, VI, And VII
Derivative [Line Items]
Derivative, notional amount	$ 40
Interest Rate Swaps | Cash Flow Hedges | Heartland Financial Statutory Trust IV
Derivative [Line Items]
Derivative, notional amount		$ 25
Interest Rate Swaps | Cash Flow Hedges | OCGI Statutory Trust III
Derivative [Line Items]
Derivative, notional amount			3
Interest Rate Swaps | Cash Flow Hedges | OCGI Capital Trust IV
Derivative [Line Items]
Derivative, notional amount			$ 6

DERIVATIVE FINANCIAL INSTRUME_5

DERIVATIVE FINANCIAL INSTRUMENTS (Cash flow hedges balance sheet category and fair values) (Details) - Other liabilities - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Interest Rate Swap due March 17, 2021
Derivatives, Fair Value [Line Items]
Notional Amount		$ 25,000
Fair Value		$ (127)
Receive Rate		0.229%
Weighted Average Pay Rate		2.255%
Interest Rate Swap due May 10, 2021
Derivatives, Fair Value [Line Items]
Notional Amount		$ 21,667
Fair Value		$ (91)
Receive Rate		2.649%
Weighted Average Pay Rate		3.674%
Interest Rate Swap Due July 24, 2028
Derivatives, Fair Value [Line Items]
Notional Amount	$ 21,250	$ 22,750
Fair Value	$ (1,636)	$ (2,220)
Receive Rate	2.591%	2.643%
Weighted Average Pay Rate	5.425%	5.425%
Interest Rate Swap due June 15, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,107)	$ (1,482)
Receive Rate	0.119%	0.217%
Weighted Average Pay Rate	2.39%	2.39%
Interest Rate Swap due March 1, 2024
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,049)	$ (1,385)
Receive Rate	0.135%	0.225%
Weighted Average Pay Rate	2.352%	2.352%
Interest Rate Swap Due June 15, 2021
Derivatives, Fair Value [Line Items]
Notional Amount		$ 6,000
Fair Value		$ (50)
Receive Rate		0.217%
Weighted Average Pay Rate		1.866%
Interest Rate Swap Due June 30, 2021
Derivatives, Fair Value [Line Items]
Notional Amount		$ 3,000
Fair Value		$ (25)
Receive Rate		0.241%
Weighted Average Pay Rate		1.878%

DERIVATIVE FINANCIAL INSTRUME_6

DERIVATIVE FINANCIAL INSTRUMENTS (Cash flow hedges gains (losses) recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	$ 745	$ 317	$ 2,633	$ (3,363)
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	461	423	1,058	613
Interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Recognized in OCI, Amount of Gain (Loss)	291	(100)	1,588	(3,963)
Interest rate swaps | Interest expense
Trading Activity, Gains and Losses, Net [Line Items]
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss)	454	417	1,045	600
Interest rate swaps | Other income
Trading Activity, Gains and Losses, Net [Line Items]
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss)	$ 0	$ 0	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUME_7

DERIVATIVE FINANCIAL INSTRUMENTS (Fair value hedges narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash pledged as collateral	$ 2.9	$ 3.8
Fair Value Hedging | Interest Rate Swaps
Derivative [Line Items]
Cash pledged as collateral	$ 3.8	$ 4.2

DERIVATIVE FINANCIAL INSTRUME_8

DERIVATIVE FINANCIAL INSTRUMENTS (Fair value hedges balance sheet category and fair values) (Details) - Fair value hedges - Other liabilities - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Amount	$ 16,901	$ 20,841
Fair Value	$ (1,585)	$ (2,480)

DERIVATIVE FINANCIAL INSTRUME_9

DERIVATIVE FINANCIAL INSTRUMENTS (Fair value hedges gans (losses) recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair value hedges | Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$ 132	$ 4	$ 895	$ (1,673)

DERIVATIVE FINANCIAL INSTRUM_10

DERIVATIVE FINANCIAL INSTRUMENTS (Embedded derivatives blance sheet category and fair values) (Details) - Embedded derivatives - Other assets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Amount	$ 8,971	$ 9,198
Fair Value	$ 497	$ 680

DERIVATIVE FINANCIAL INSTRUM_11

DERIVATIVE FINANCIAL INSTRUMENTS (Embedded derivatives gain (losses) recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other noninterest income | Embedded derivatives
Derivative [Line Items]
Amount of Gain (Loss)	$ (54)	$ 1	$ (183)	$ 362

DERIVATIVE FINANCIAL INSTRUM_12

DERIVATIVE FINANCIAL INSTRUMENTS (Back-to-back loan swaps narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Derivative [Line Items]
Cash pledged as collateral	$ 2,900,000		$ 2,900,000		$ 3,800,000
Counterparties
Derivative [Line Items]
Cash pledged as collateral	0		0		0
Back-to-Back Loan Swaps | Interest Rate Swaps
Derivative [Line Items]
Cash pledged as collateral	30,600,000		30,600,000		46,500,000
Gain (loss) recognized	0	$ 0	0	$ 0
Back-to-Back Loan Swaps | Interest Rate Swaps | Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0		$ 0		$ 0

DERIVATIVE FINANCIAL INSTRUM_13

DERIVATIVE FINANCIAL INSTRUMENTS (Back-to-back loan swaps balance sheet category and fair values) (Details) - Back-to-Back Loan Swaps - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other assets
Derivative [Line Items]
Notional Amount	$ 438,415	$ 440,719
Fair Value	29,394	43,422
Other liabilities
Derivative [Line Items]
Notional Amount	438,415	440,719
Fair Value	$ (29,394)	$ (43,422)
Weighted Average Receive Rate | Other assets
Derivative [Line Items]
Weighted Average Rate	4.50%	4.46%
Weighted Average Receive Rate | Other liabilities
Derivative [Line Items]
Weighted Average Rate	2.43%	2.46%
Weighted Average Pay Rate | Other assets
Derivative [Line Items]
Weighted Average Rate	2.43%	2.46%
Weighted Average Pay Rate | Other liabilities
Derivative [Line Items]
Weighted Average Rate	4.50%	4.46%

DERIVATIVE FINANCIAL INSTRUM_14

DERIVATIVE FINANCIAL INSTRUMENTS (Other free standing derivatives narrative) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Cash pledged as collateral	$ 2,900,000	$ 3,800,000
Counterparties
Derivative [Line Items]
Cash pledged as collateral	0	0
Not Designated as Hedging Instrument
Derivative [Line Items]
Cash pledged as collateral	0	0
Not Designated as Hedging Instrument | Counterparties
Derivative [Line Items]
Cash pledged as collateral	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUM_15

DERIVATIVE FINANCIAL INSTRUMENTS (Other free standing derivatives balance sheet category and fair values) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other assets | Interest rate lock commitments (mortgage)
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	$ 39,922	$ 42,078
Fair Value	1,425	1,827
Other assets | Forward commitments
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	9,500	0
Fair Value	8	0
Other liabilities | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount	59,000	86,500
Fair Value	(202)	(697)
Other liabilities | Undesignated interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	8,971	9,198
Fair Value	$ (497)	$ (680)

DERIVATIVE FINANCIAL INSTRUM_16

DERIVATIVE FINANCIAL INSTRUMENTS (Other free standing derivatives gains (losses) recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net gains on sale of loans held for sale | Interest rate lock commitments (mortgage)
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ (250)	$ 1,296	$ (1,735)	$ 2,994
Net gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	(1,403)	962	503	(184)
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 54	$ (1)	$ 183	$ (362)

FAIR VALUE (Fair value measurem

FAIR VALUE (Fair value measurement recurring) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Equity securities with a readily determinable fair value	$ 20,651
Level 1
Assets
Securities available for sale	1,016	$ 2,026
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Level 2
Assets
Securities available for sale	6,542,962	6,125,949
Derivative assets	29,891	44,102
Liabilities
Derivative liabilities	35,368	51,962
Level 3
Assets
Securities available for sale	0	0
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Forward commitments | Level 1
Assets
Derivative assets	0
Forward commitments | Level 2
Assets
Derivative assets	8
Forward commitments | Level 3
Assets
Derivative assets	0
U.S. treasuries
Assets
Securities available for sale	1,016	2,026
U.S. agencies
Assets
Securities available for sale	35,371	166,779
Obligations of states and political subdivisions
Assets
Securities available for sale	1,871,786	1,635,227
Commercial mortgage-backed securities - agency
Assets
Securities available for sale	125,080	174,153
Commercial mortgage-backed securities - non-agency
Assets
Securities available for sale	535,305	252,767
Asset-backed securities
Assets
Securities available for sale	846,987	1,069,266
Corporate bonds
Assets
Securities available for sale	3,815	3,742
Recurring Basis
Assets
Equity securities with a readily determinable fair value	20,651	19,629
Total assets at fair value	6,575,302	6,173,904
Liabilities
Total liabilities at fair value	35,470	52,659
Recurring Basis | Level 1
Assets
Equity securities with a readily determinable fair value	0	0
Total assets at fair value	1,016	2,026
Liabilities
Total liabilities at fair value	0	0
Recurring Basis | Level 2
Assets
Equity securities with a readily determinable fair value	20,651	19,629
Total assets at fair value	6,572,861	6,170,051
Liabilities
Total liabilities at fair value	35,470	52,659
Recurring Basis | Level 3
Assets
Equity securities with a readily determinable fair value	0	0
Total assets at fair value	1,425	1,827
Liabilities
Total liabilities at fair value	0	0
Recurring Basis | Derivative financial instruments
Assets
Derivative assets	29,891	44,102
Liabilities
Derivative liabilities	35,268	51,962
Recurring Basis | Derivative financial instruments | Level 1
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Derivative financial instruments | Level 2
Assets
Derivative assets	29,891	44,102
Liabilities
Derivative liabilities	35,268	51,962
Recurring Basis | Derivative financial instruments | Level 3
Assets
Derivative assets	0	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Interest rate lock commitments
Assets
Derivative assets	1,425	1,827
Recurring Basis | Interest rate lock commitments | Level 1
Assets
Derivative assets	0	0
Recurring Basis | Interest rate lock commitments | Level 2
Assets
Derivative assets	0	0
Recurring Basis | Interest rate lock commitments | Level 3
Assets
Derivative assets	1,425	1,827
Recurring Basis | Forward commitments
Assets
Derivative assets	8
Liabilities
Derivative liabilities	202	697
Recurring Basis | Forward commitments | Level 1
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | Forward commitments | Level 2
Assets
Derivative assets	8
Liabilities
Derivative liabilities	202	697
Recurring Basis | Forward commitments | Level 3
Assets
Derivative assets	0
Liabilities
Derivative liabilities	0	0
Recurring Basis | U.S. treasuries
Assets
Securities available for sale	1,016	2,026
Recurring Basis | U.S. treasuries | Level 1
Assets
Securities available for sale	1,016	2,026
Recurring Basis | U.S. treasuries | Level 2
Assets
Securities available for sale	0	0
Recurring Basis | U.S. treasuries | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | U.S. agencies
Assets
Securities available for sale	35,371	166,779
Recurring Basis | U.S. agencies | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | U.S. agencies | Level 2
Assets
Securities available for sale	35,371	166,779
Recurring Basis | U.S. agencies | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Obligations of states and political subdivisions
Assets
Securities available for sale	1,871,786	1,635,227
Recurring Basis | Obligations of states and political subdivisions | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Obligations of states and political subdivisions | Level 2
Assets
Securities available for sale	1,871,786	1,635,227
Recurring Basis | Obligations of states and political subdivisions | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Mortgage-backed securities - agency
Assets
Securities available for sale	1,740,675	1,355,270
Recurring Basis | Mortgage-backed securities - agency | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Mortgage-backed securities - agency | Level 2
Assets
Securities available for sale	1,740,675	1,355,270
Recurring Basis | Mortgage-backed securities - agency | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Mortgage-backed securities - non-agency
Assets
Securities available for sale	1,363,292	1,449,116
Recurring Basis | Mortgage-backed securities - non-agency | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Mortgage-backed securities - non-agency | Level 2
Assets
Securities available for sale	1,363,292	1,449,116
Recurring Basis | Mortgage-backed securities - non-agency | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Commercial mortgage-backed securities - agency
Assets
Securities available for sale	125,080	174,153
Recurring Basis | Commercial mortgage-backed securities - agency | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Commercial mortgage-backed securities - agency | Level 2
Assets
Securities available for sale	125,080	174,153
Recurring Basis | Commercial mortgage-backed securities - agency | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Commercial mortgage-backed securities - non-agency
Assets
Securities available for sale	535,305	252,767
Recurring Basis | Commercial mortgage-backed securities - non-agency | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Commercial mortgage-backed securities - non-agency | Level 2
Assets
Securities available for sale	535,305	252,767
Recurring Basis | Commercial mortgage-backed securities - non-agency | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Asset-backed securities
Assets
Securities available for sale	846,987	1,069,266
Recurring Basis | Asset-backed securities | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Asset-backed securities | Level 2
Assets
Securities available for sale	846,987	1,069,266
Recurring Basis | Asset-backed securities | Level 3
Assets
Securities available for sale	0	0
Recurring Basis | Corporate bonds
Assets
Securities available for sale	3,815	3,742
Recurring Basis | Corporate bonds | Level 1
Assets
Securities available for sale	0	0
Recurring Basis | Corporate bonds | Level 2
Assets
Securities available for sale	3,815	3,742
Recurring Basis | Corporate bonds | Level 3
Assets
Securities available for sale	$ 0	$ 0

FAIR VALUE (Fair value measur_2

FAIR VALUE (Fair value measurement non-recurring) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 6,314	$ 6,624
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	33,248	57,949
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0	0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	41,445	34,488
Loans held for sale	33,248	57,949
Other real estate owned	6,314	6,624
Fair Value, Measurements, Nonrecurring | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights	5,559	5,189
Fair Value, Measurements, Nonrecurring | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	6,925	6,499
Fair Value, Measurements, Nonrecurring | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,851	12,082
Loans held for sale	(1,304)	(982)
Other real estate owned	(88)	1,044
Fair Value, Measurements, Nonrecurring | Changes Measurement | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights	(391)	1,778
Fair Value, Measurements, Nonrecurring | Changes Measurement | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	(44)	3,288
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Loans held for sale	0	0
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Level 1 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights	0	0
Fair Value, Measurements, Nonrecurring | Level 1 | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	0	0
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Loans held for sale	33,248	57,949
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Level 2 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights	0	0
Fair Value, Measurements, Nonrecurring | Level 2 | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	0	0
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	41,445	34,488
Loans held for sale	0	0
Other real estate owned	6,314	6,624
Fair Value, Measurements, Nonrecurring | Level 3 | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights	5,559	5,189
Fair Value, Measurements, Nonrecurring | Level 3 | Premises, furniture and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises, furniture and equipment held for sale	6,925	6,499
Fair Value, Measurements, Nonrecurring | Agricultural and agricultural real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,161	12,451
Fair Value, Measurements, Nonrecurring | Agricultural and agricultural real estate | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Fair Value, Measurements, Nonrecurring | Agricultural and agricultural real estate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Fair Value, Measurements, Nonrecurring | Agricultural and agricultural real estate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Fair Value, Measurements, Nonrecurring | Agricultural and agricultural real estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,161	12,451
Commercial and industrial | Fair Value, Measurements, Nonrecurring | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	8,969	11,256
Commercial and industrial | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	214	451
Commercial and industrial | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Commercial and industrial | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Commercial and industrial | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	8,969	11,256
Owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,573	5,874
Owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	11,631
Owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	3,573	5,874
Non-owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	14,742	4,907
Non-owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	1,637	0
Non-owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Non-owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	0	0
Non-owner occupied commercial real estate | Fair Value, Measurements, Nonrecurring | Commercial and industrial | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	$ 14,742	$ 4,907

FAIR VALUE (Quantitative Inform

FAIR VALUE (Quantitative Information about Level 3 fair value measurements) (Details) - Level 3 $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 0	$ 0
Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,425	1,827
Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	5,559	5,189
Modified appraised value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned	6,314	6,624
Modified appraised value | Agricultural and agricultural real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	14,161	12,451
Modified appraised value | Premises, furniture and equipment held for sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Premises, furniture and equipment held for sale	6,925	6,499
Interest rate lock commitments | Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 1,425	$ 1,827
Closing ratio | Discounted cash flows | Weighted Average | Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	0.88	0.86
Closing ratio | Discounted cash flows | Minimum | Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	0	0
Closing ratio | Discounted cash flows | Maximum | Interest rate lock commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input	0.99	0.99
Appraisal discount | Modified appraised value | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Appraisal discount | Modified appraised value | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	10.00%	10.00%
Appraisal discount | Modified appraised value | Premises, furniture and equipment held for sale | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Appraisal discount | Modified appraised value | Premises, furniture and equipment held for sale | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	10.00%	10.00%
Commercial and industrial | Modified appraised value | Commercial and industrial
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 8,969	$ 11,256
Commercial and industrial | Modified appraised value | Owner occupied commercial real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	3,573	5,874
Commercial and industrial | Modified appraised value | Non-owner occupied commercial real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	$ 14,742	$ 4,907
Commercial and industrial | Appraisal discount | Modified appraised value | Commercial and industrial | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Commercial and industrial | Appraisal discount | Modified appraised value | Commercial and industrial | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	8.00%	8.00%
Commercial and industrial | Appraisal discount | Modified appraised value | Owner occupied commercial real estate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Commercial and industrial | Appraisal discount | Modified appraised value | Owner occupied commercial real estate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	7.00%	12.00%
Commercial and industrial | Appraisal discount | Modified appraised value | Non-owner occupied commercial real estate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Commercial and industrial | Appraisal discount | Modified appraised value | Non-owner occupied commercial real estate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	10.00%	10.00%
Agricultural and agricultural real estate | Appraisal discount | Modified appraised value | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	0.00%	0.00%
Agricultural and agricultural real estate | Appraisal discount | Modified appraised value | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing assets, discount rate	15.00%	10.00%

FAIR VALUE (Changes Level 3 ass

FAIR VALUE (Changes Level 3 assets fair value, recurring) (Details) - Interest rate lock commitments - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 1,827	$ 681
Total net gains included in earnings	(1,735)	2,803
Issuances	8,892	17,221
Settlements	(7,559)	(18,878)
Balance at period end	$ 1,425	$ 1,827

FAIR VALUE (Deposits held for s

FAIR VALUE (Deposits held for sale narrative) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments	$ 10,470	$ 10,990
Interest rate lock commitments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gains included in gains (losses) on sale of loans held for sale attributable to interest rate lock commitments	$ 1,400		$ 1,800

FAIR VALUE (Estimated fair valu

FAIR VALUE (Estimated fair value financial instruments incl. carrying amounts) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Securities:
Held to maturity	$ 95,421	$ 100,041
Level 1
Financial assets:
Cash and cash equivalents	449,128	337,903
Time deposits in other financial institutions	3,138	3,129
Securities:
Carried at fair value	1,016	2,026
Held to maturity	0	0
Other investments	0	0
Loans held for sale	0	0
Loans, net	0	0
Cash surrender value on life insurance	0	0
Derivative assets	0	0
Financial liabilities:
Short term borrowings	0	0
Other borrowings	0	0
Derivative liabilities	0	0
Level 1 | Interest rate lock commitments
Securities:
Derivative assets	0	0
Level 1 | Demand deposits
Financial liabilities:
Deposits	0	0
Level 1 | Savings deposits
Financial liabilities:
Deposits	0	0
Level 1 | Time deposits
Financial liabilities:
Deposits	0	0
Level 1 | Forward commitments
Financial liabilities:
Derivative liabilities	0	0
Level 2
Financial assets:
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	0
Securities:
Carried at fair value	6,542,962	6,125,949
Held to maturity	95,421	100,041
Other investments	76,809	75,523
Loans held for sale	33,248	57,949
Loans, net	9,793,923	9,735,181
Cash surrender value on life insurance	189,619	187,664
Derivative assets	29,891	44,102
Financial liabilities:
Short term borrowings	152,563	167,872
Other borrowings	274,631	458,806
Derivative liabilities	35,368	51,962
Level 2 | Interest rate lock commitments
Securities:
Derivative assets	0	0
Level 2 | Demand deposits
Financial liabilities:
Deposits	6,299,289	5,688,810
Level 2 | Savings deposits
Financial liabilities:
Deposits	8,189,223	8,019,704
Level 2 | Time deposits
Financial liabilities:
Deposits	1,126,788	1,273,468
Level 2 | Forward commitments
Financial liabilities:
Derivative liabilities	202	697
Level 3
Financial assets:
Cash and cash equivalents	0	0
Time deposits in other financial institutions	0	0
Securities:
Carried at fair value	0	0
Held to maturity	0	0
Other investments	0	0
Loans held for sale	0	0
Loans, net	41,445	34,488
Cash surrender value on life insurance	0	0
Derivative assets	0	0
Financial liabilities:
Short term borrowings	0	0
Other borrowings	0	0
Derivative liabilities	0	0
Level 3 | Interest rate lock commitments
Securities:
Derivative assets	1,425	1,827
Level 3 | Demand deposits
Financial liabilities:
Deposits	0	0
Level 3 | Savings deposits
Financial liabilities:
Deposits	0	0
Level 3 | Time deposits
Financial liabilities:
Deposits	0	0
Level 3 | Forward commitments
Financial liabilities:
Derivative liabilities	0	0
Commercial and industrial | Level 1 | Commercial and industrial
Securities:
Loans, net	0	0
Commercial and industrial | Level 1 | Paycheck Protection Program ("PPP")
Securities:
Loans, net	0	0
Commercial and industrial | Level 1 | Owner occupied commercial real estate
Securities:
Loans, net	0	0
Commercial and industrial | Level 1 | Non-owner occupied commercial real estate
Securities:
Loans, net	0	0
Commercial and industrial | Level 1 | Real estate construction
Securities:
Loans, net	0	0
Commercial and industrial | Level 2 | Commercial and industrial
Securities:
Loans, net	2,460,167	2,379,785
Commercial and industrial | Level 2 | Paycheck Protection Program ("PPP")
Securities:
Loans, net	829,175	957,785
Commercial and industrial | Level 2 | Owner occupied commercial real estate
Securities:
Loans, net	1,897,958	1,739,523
Commercial and industrial | Level 2 | Non-owner occupied commercial real estate
Securities:
Loans, net	1,938,522	1,887,306
Commercial and industrial | Level 2 | Real estate construction
Securities:
Loans, net	838,001	849,224
Commercial and industrial | Level 3 | Commercial and industrial
Securities:
Loans, net	8,969	11,256
Commercial and industrial | Level 3 | Paycheck Protection Program ("PPP")
Securities:
Loans, net	0	0
Commercial and industrial | Level 3 | Owner occupied commercial real estate
Securities:
Loans, net	3,573	5,874
Commercial and industrial | Level 3 | Non-owner occupied commercial real estate
Securities:
Loans, net	14,742	4,907
Commercial and industrial | Level 3 | Real estate construction
Securities:
Loans, net	0	0
Agricultural and agricultural real estate | Level 1
Securities:
Loans, net	0	0
Agricultural and agricultural real estate | Level 2
Securities:
Loans, net	646,489	685,278
Agricultural and agricultural real estate | Level 3
Securities:
Loans, net	14,161	12,451
Residential real estate | Level 1
Securities:
Loans, net	0	0
Residential real estate | Level 2
Securities:
Loans, net	789,274	828,366
Residential real estate | Level 3
Securities:
Loans, net	0	0
Consumer | Level 1
Securities:
Loans, net	0	0
Consumer | Level 2
Securities:
Loans, net	394,337	407,914
Consumer | Level 3
Securities:
Loans, net	0	0
Carrying Amount
Financial assets:
Cash and cash equivalents	449,128	337,903
Time deposits in other financial institutions	3,138	3,129
Securities:
Carried at fair value	6,543,978	6,127,975
Held to maturity	85,439	88,839
Other investments	76,809	75,253
Loans held for sale	33,248	57,949
Loans, net	9,891,288	9,891,445
Cash surrender value on life insurance	189,619	187,664
Derivative assets	29,891	44,102
Financial liabilities:
Short term borrowings	152,563	167,872
Other borrowings	271,244	457,042
Derivative liabilities	35,268	51,962
Carrying Amount | Interest rate lock commitments
Securities:
Derivative assets	1,425	1,827
Carrying Amount | Demand deposits
Financial liabilities:
Deposits	6,299,289	5,688,810
Carrying Amount | Savings deposits
Financial liabilities:
Deposits	8,189,223	8,019,704
Carrying Amount | Time deposits
Financial liabilities:
Deposits	1,126,606	1,271,391
Carrying Amount | Forward commitments
Financial liabilities:
Derivative liabilities	202	697
Carrying Amount | Commercial and industrial | Commercial and industrial
Securities:
Loans, net	2,487,576	2,495,981
Carrying Amount | Commercial and industrial | Paycheck Protection Program ("PPP")
Securities:
Loans, net	829,175	957,785
Carrying Amount | Commercial and industrial | Owner occupied commercial real estate
Securities:
Loans, net	1,920,144	1,756,405
Carrying Amount | Commercial and industrial | Non-owner occupied commercial real estate
Securities:
Loans, net	1,964,541	1,900,608
Carrying Amount | Commercial and industrial | Real estate construction
Securities:
Loans, net	834,715	843,140
Carrying Amount | Agricultural and agricultural real estate
Securities:
Loans, net	672,448	707,397
Carrying Amount | Residential real estate
Securities:
Loans, net	791,143	828,507
Carrying Amount | Consumer
Securities:
Loans, net	391,546	401,622
Estimated Fair Value
Financial assets:
Cash and cash equivalents	449,128	337,903
Time deposits in other financial institutions	3,138	3,129
Securities:
Carried at fair value	6,543,978	6,127,975
Held to maturity	95,421	100,041
Other investments	76,809	75,523
Loans held for sale	33,248	57,949
Loans, net	9,835,368	9,769,669
Cash surrender value on life insurance	189,619	187,664
Derivative assets	29,891	44,102
Financial liabilities:
Short term borrowings	152,563	167,872
Other borrowings	274,631	458,806
Derivative liabilities	35,368	51,962
Estimated Fair Value | Interest rate lock commitments
Securities:
Derivative assets	1,425	1,827
Estimated Fair Value | Demand deposits
Financial liabilities:
Deposits	6,299,289	5,688,810
Estimated Fair Value | Savings deposits
Financial liabilities:
Deposits	8,189,223	8,019,704
Estimated Fair Value | Time deposits
Financial liabilities:
Deposits	1,126,788	1,273,468
Estimated Fair Value | Forward commitments
Financial liabilities:
Derivative liabilities	202	697
Estimated Fair Value | Commercial and industrial | Commercial and industrial
Securities:
Loans, net	2,469,136	2,391,041
Estimated Fair Value | Commercial and industrial | Paycheck Protection Program ("PPP")
Securities:
Loans, net	829,175	957,785
Estimated Fair Value | Commercial and industrial | Owner occupied commercial real estate
Securities:
Loans, net	1,901,531	1,745,397
Estimated Fair Value | Commercial and industrial | Non-owner occupied commercial real estate
Securities:
Loans, net	1,953,264	1,892,213
Estimated Fair Value | Commercial and industrial | Real estate construction
Securities:
Loans, net	838,001	849,224
Estimated Fair Value | Agricultural and agricultural real estate
Securities:
Loans, net	660,650	697,729
Estimated Fair Value | Residential real estate
Securities:
Loans, net	789,274	828,366
Estimated Fair Value | Consumer
Securities:
Loans, net	394,337	$ 407,914
Forward commitments | Level 1
Securities:
Derivative assets	0
Forward commitments | Level 2
Securities:
Derivative assets	8
Forward commitments | Level 3
Securities:
Derivative assets	0
Forward commitments | Carrying Amount
Securities:
Derivative assets	8
Forward commitments | Estimated Fair Value
Securities:
Derivative assets	$ 8

REVENUE (Details)

REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	$ 22,036	$ 16,544	$ 42,337	$ 34,320
Loan servicing income	873	379	1,711	1,342
Securities gains, net	2,842	2,006	2,812	3,664
Unrealized gain/ (loss) on equity securities, net	83	680	(27)	449
Net gains on sale of loans held for sale	4,753	7,857	11,173	12,517
Valuation adjustment on servicing rights	(526)	9	391	(1,556)
Income on bank owned life insurance	937	1,167	1,766	1,665
Other noninterest income	2,166	1,995	3,318	4,053
Total noninterest income out-of-scope of Topic 606	11,128	14,093	21,144	22,134
TOTAL NONINTEREST INCOME	33,164	30,637	63,481	56,454
Total service charges and fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	15,132	10,972	28,803	22,993
Service charges and fees on deposit accounts
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	4,014	3,476	7,950	6,913
Overdraft fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	2,549	1,634	5,141	4,443
Customer service and other service fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	54	35	100	94
Credit card fee income
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	5,854	4,067	10,162	7,967
Debit card income
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	2,661	1,760	5,450	3,576
Trust fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	6,039	4,977	11,816	9,999
Brokerage and insurance commissions
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	$ 865	$ 595	$ 1,718	$ 1,328

STOCK COMPENSATION (Narrative)

STOCK COMPENSATION (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	May 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance (in shares)					1,460,000
Shares available for issuance (in shares)			1,200,807
Excess tax benefit related to share-based payment awards			$ 303	$ 91
Share-based compensation, period before change in control			6 months
Time-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	104,462	114,944
Share-based compensation, award vesting periods			3 years
Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)	60,339	50,787
Share-based compensation, award vesting periods			3 years	3 years
Share-based compensation, vesting percentage after change in control			100.00%
Share-based compensation, vesting period after change in control			24 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, granted (in shares)			41,974	46,613
Share-based compensation costs			$ 4,600	$ 3,400
Share-based unrecognized compensation costs			$ 11,300

STOCK COMPENSATION (Summary of

STOCK COMPENSATION (Summary of RSUs Activity) (Details) - RSUs - $ / shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Shares
Outstanding at beginning of period (in shares)	348,275	254,383
Granted (in shares)	208,513	212,344
Vested (in shares)	(146,381)	(118,686)
Forfeited (in shares)	(18,861)	(14,648)
Outstanding at end of period (in shares)	391,546	333,393
Weighted-Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 38.22	$ 46.76
Granted (in dollars per share)	51.63	32
Vested (in dollars per share)	40.89	44.52
Forfeited (in dollars per share)	42.88	47
Outstanding at end of period (in dollars per share)	$ 44.08	$ 38.55