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SECURITIES (Tables)
 6 Months Ended
Jun. 30, 2024
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, 2024, and December 31, 2023, are summarized in the table below, in thousands:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
June 30, 2024    
U.S. treasuries$15,997 $— $(150)$15,847 
U.S. agencies12,729 — (129)12,600 
Obligations of states and political subdivisions834,260 10 (109,805)724,465 
Mortgage-backed securities - agency1,559,738 10 (230,460)1,329,288 
Mortgage-backed securities - non-agency1,408,505 257 (72,622)1,336,140 
Commercial mortgage-backed securities - agency71,770 — (11,269)60,501 
Commercial mortgage-backed securities - non-agency397,330 — (9,391)387,939 
Asset-backed securities193,022 — (16,640)176,382 
Corporate bonds121,888 — (1,582)120,306 
Total debt securities4,615,239 277 (452,048)4,163,468 
Equity securities with a readily determinable fair value21,586 — — 21,586 
Total$4,636,825 $277 $(452,048)$4,185,054 
December 31, 2023
U.S. treasuries$32,459 $— $(341)$32,118 
U.S. agencies14,724 — (194)14,530 
Obligations of states and political subdivisions839,754 25 (98,534)741,245 
Mortgage-backed securities - agency1,620,409 13 (226,793)1,393,629 
Mortgage-backed securities - non-agency1,616,414 363 (87,649)1,529,128 
Commercial mortgage-backed securities - agency76,076 — (11,288)64,788 
Commercial mortgage-backed securities - non-agency526,974 — (12,116)514,858 
Asset-backed securities232,140 — (14,770)217,370 
Corporate bonds120,338 — (2,169)118,169 
Total debt securities5,079,288 401 (453,854)4,625,835 
Equity securities with a readily determinable fair value21,056 — — 21,056 
Total$5,100,344 $401 $(453,854)$4,646,891 
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, 2024, and December 31, 2023, are summarized in the table below, in thousands:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
June 30, 2024    
Obligations of states and political subdivisions$842,980 $2,246 (35,710)$809,516 
Total$842,980 $2,246 $(35,710)$809,516 
December 31, 2023
Obligations of states and political subdivisions$838,241 $3,622 $(25,464)$816,399 
Total$838,241 $3,622 $(25,464)$816,399 
Securities held to maturityLess than 12 months12 months or longerTotal
Fair
Value		Unrealized
Losses		CountFair
Value		Unrealized
Losses		CountFair
Value		Unrealized
Losses		Count
June 30, 2024
Obligations of states and political subdivisions$27,460 $(472)9 $704,626 $(35,238)147 $732,086 $(35,710)156 
Total temporarily impaired securities$27,460 (472)9 $704,626 $(35,238)147 $732,086 (35,710)156 
December 31, 2023
Obligations of states and political subdivisions$145,471 $(3,706)23 $569,691 $(21,758)126 $715,162 $(25,464)149 
Total temporarily impaired securities$145,471 $(3,706)23 $569,691 $(21,758)126 $715,162 $(25,464)149 
Investments Classified by Contractual Maturity Date
The amortized cost and estimated fair value of investment securities carried at fair value at June 30, 2024, 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, 2024
Amortized CostEstimated Fair Value
Due in 1 year or less$13,642 $13,509 
Due in 1 to 5 years57,666 56,991 
Due in 5 to 10 years28,145 24,841 
Due after 10 years885,421 777,877 
Total debt securities984,874 873,218 
Mortgage and asset-backed securities3,630,365 3,290,250 
Equity securities with a readily determinable fair value 21,586 21,586 
Total investment securities$4,636,825 $4,185,054 

The amortized cost and estimated fair value of debt securities held to maturity at June 30, 2024, 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, 2024
Amortized CostEstimated Fair Value
Due in 1 year or less$9,259 $9,266 
Due in 1 to 5 years92,315 91,718 
Due in 5 to 10 years218,329 213,258 
Due after 10 years523,077 495,274 
Total debt securities$842,980 $809,516 
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, 2024 and 2023, are summarized as follows, in thousands:
Three Months Ended
June 30,		Six Months Ended
June 30,
2024202320242023
Proceeds from sales$97,836 $140,290 $97,836 $286,738 
Gross security gains— 483 — 483 
Gross security losses10,556 808 10,556 1,912 
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, 2024, and December 31, 2023. 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 was June 30, 2023, and December 31, 2022, respectively.
Debt securities available for saleLess than 12 months12 months or longerTotal
 Fair
Value		Unrealized
Losses		CountFair
Value		Unrealized
Losses		CountFair
Value		Unrealized
Losses		Count
June 30, 2024
U.S. treasuries$2,971 $(25)1 $12,876 $(125)3 $15,847 $(150)4 
U.S. agencies— — — 12,600 (129)4 12,600 (129)4 
Obligations of states and political subdivisions1,679 (24)3 718,773 (109,781)148 720,452 (109,805)151 
Mortgage-backed securities - agency— — — 1,328,609 (230,460)164 1,328,609 (230,460)164 
Mortgage-backed securities - non-agency259,143 (16,261)6 839,345 (56,361)37 1,098,488 (72,622)43 
Commercial mortgage-backed securities - agency— — — 60,501 (11,269)15 60,501 (11,269)15 
Commercial mortgage-backed securities - non-agency— — — 380,125 (9,391)14 380,125 (9,391)14 
Asset-backed securities120,432 (11,360)4 55,950 (5,280)5 176,382 (16,640)9 
Corporate bonds— — — 57,611 (1,582)8 57,611 (1,582)8 
Total temporarily impaired securities$384,225 $(27,670)14 $3,466,390 $(424,378)398 $3,850,615 $(452,048)412 
December 31, 2023
U.S. treasuries$2,985 $(12)1 $26,138 $(329)3 $29,123 $(341)4 
U.S. agencies— — — 14,530 (194)4 14,530 (194)4 
Obligations of states and political subdivisions1,440 (65)1 736,653 (98,469)150 738,093 (98,534)151 
Mortgage-backed securities - agency194 (2)2 1,392,769 (226,791)166 1,392,963 (226,793)168 
Mortgage-backed securities - non-agency415,934 (24,568)12 902,291 (63,081)35 1,318,225 (87,649)47 
Commercial mortgage-backed securities - agency— — — 64,788 (11,288)17 64,788 (11,288)17 
Commercial mortgage-backed securities - non-agency— — — 507,044 (12,116)16 507,044 (12,116)16 
Asset-backed securities148,063 (9,723)4 69,307 (5,047)7 217,370 (14,770)11 
Corporate bonds61,031 (111)1 57,138 (2,058)8 118,169 (2,169)9 
Total temporarily impaired securities$629,647 $(34,481)21 $3,770,658 $(419,373)406 $4,400,305 $(453,854)427 
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, 2024, and December 31, 2023, which are updated quarterly and used to monitor the credit quality of the securities:
June 30, 2024December 31, 2023
Rating
AAA$101,620 $88,550 
AA, AA+, AA-565,305 583,816 
A+, A, A-151,225 139,658 
BBB20,288 20,133 
Not Rated4,542 6,084 
Total $842,980 $838,241 
The following table shows the risk category of loans by loan category, year of origination and charge-offs as of June 30, 2024, in thousands:
As of June 30, 2024Amortized Cost Basis of Term Loans by Year of Origination
202420232022202120202019 and PriorRevolvingTotal
Commercial and industrial
Pass$295,000 $512,146 $618,107 $261,964 $154,860 $358,689 $1,068,196 $3,268,962 
Watch 13,856 28,148 32,584 18,695 833 8,763 81,055 183,934 
Substandard 312 6,131 16,329 1,723 3,751 9,041 51,056 88,343 
Commercial and industrial total$309,168 $546,425 $667,020 $282,382 $159,444 $376,493 $1,200,307 $3,541,239 
Commercial and industrial charge-offs$— $8 $1,127 $784 $3,283 $30 $2,979 $8,211 
PPP
Pass$— $— $— $1,610 $31 $— $— $1,641 
Watch— — — 223 — — — 223 
Substandard— — — — — — — — 
PPP total $— $— $— $1,833 $31 $— $— $1,864 
PPP charge-offs$— $— $— $— $— $— $— $— 
Owner occupied commercial real estate
Pass$110,750 $425,238 $510,666 $711,407 $200,668 $368,105 $42,998 $2,369,832 
Watch2,788 4,983 36,793 11,004 2,920 39,109 — 97,597 
Substandard— 23,401 32,536 4,913 20,499 7,186 — 88,535 
Owner occupied commercial real estate total$113,538 $453,622 $579,995 $727,324 $224,087 $414,400 $42,998 $2,555,964 
Owner occupied commercial real estate charge-offs$— $— $87 $— $248 $62 $— $397 
Non-owner occupied commercial real estate
Pass$75,332 $423,879 $648,769 $401,764 $181,074 $434,109 $16,812 $2,181,739 
Watch3,943 67,195 44,057 4,601 4,097 67,735 — 191,628 
Substandard— — 135 8,538 — 52,218 — 60,891 
Non-owner occupied commercial real estate total$79,275 $491,074 $692,961 $414,903 $185,171 $554,062 $16,812 $2,434,258 
Non-owner occupied commercial real estate charge-offs$— $— $— $— $— $— $— $— 
As of June 30, 2024Amortized Cost Basis of Term Loans by Year of Origination
202420232022202120202019 and PriorRevolvingTotal
Real estate construction
Pass$64,091 $323,350 $404,646 $104,823 $7,544 $10,269 $7,324 $922,047 
Watch — 917 20,576 44,063 71 24,656 — 90,283 
Substandard3,116 9,375 57,650 88 — 81 86 70,396 
Real estate construction total$67,207 $333,642 $482,872 $148,974 $7,615 $35,006 $7,410 $1,082,726 
Real estate construction charge-offs$— $— $— $— $— $— $— $— 
Agricultural and agricultural real estate
Pass$50,760 $113,573 $178,283 $98,886 $49,712 $58,360 $204,938 $754,512 
Watch755 3,095 1,291 420 152 73 6,648 12,434 
Substandard526 181 19,399 2,040 1,582 12,284 — 36,012 
Agricultural and agricultural real estate total$52,041 $116,849 $198,973 $101,346 $51,446 $70,717 $211,586 $802,958 
Agricultural and agricultural real estate charge-offs$— $— $52 $— $8 $167 $648 $875 
Residential real estate
Pass$26,824 $61,048 $155,494 $214,982 $64,465 $173,439 $19,687 $715,939 
Watch2 534 998 1,452 1,829 3,537 250 8,602 
Substandard— 727 140 3,222 366 4,405 — 8,860 
Residential real estate total $26,826 $62,309 $156,632 $219,656 $66,660 $181,381 $19,937 $733,401 
Residential real estate charge-offs$— $— $— $— $— $— $— $— 
Consumer
Pass$18,993 $36,800 $50,951 $29,240 $3,133 $6,709 $301,963 $447,789 
Watch49 901 94 203 17 802 2,546 4,612 
Substandard334 51 317 372 108 1,377 939 3,498 
Consumer total$19,376 $37,752 $51,362 $29,815 $3,258 $8,888 $305,448 $455,899 
Consumer charge-offs$10 $51 $92 $62 $13 $49 $1,721 $1,998 
Total Pass$641,750 $1,896,034 $2,566,916 $1,824,676 $661,487 $1,409,680 $1,661,918 $10,662,461 
Total Watch21,393 105,773 136,393 80,661 9,919 144,675 90,499 589,313 
Total Substandard 4,288 39,866 126,506 20,896 26,306 86,592 52,081 356,535 
Total Loans$667,431 $2,041,673 $2,829,815 $1,926,233 $697,712 $1,640,947 $1,804,498 $11,608,309 
Total charge-offs$10 $59 $1,358 $846 $3,552 $308 $5,348 $11,481 

The following table shows the risk category of loans by loan category and year of origination as of December 31, 2023, in thousands.
As of December 31, 2023Amortized Cost Basis of Term Loans by Year of Origination
202320222021202020192018 and PriorRevolvingTotal
Commercial and industrial
Pass$608,030 $779,218 $333,900 $187,406 $78,455 $327,775 $1,159,397 $3,474,181 
Watch 20,694 19,788 257 3,631 2,398 2,953 28,749 78,470 
Substandard 20,171 12,658 2,636 5,447 18,535 7,489 32,460 99,396 
Commercial and industrial total$648,895 $811,664 $336,793 $196,484 $99,388 $338,217 $1,220,606 $3,652,047 
Commercial and industrial charge-offs$245 $794 $680 $1,425 $563 $1,949 $2,966 $8,622 
PPP
Pass$— $— $2,591 $50 $— $— $— $2,641 
Watch— — 89 — — — — 89 
Substandard— — 47 — — — — 47 
PPP total $— $— $2,727 $50 $— $— $— $2,777 
PPP charge-offs$— $— $— $— $— $— $— $— 
As of December 31, 2023Amortized Cost Basis of Term Loans by Year of Origination
202320222021202020192018 and PriorRevolvingTotal
Owner occupied commercial real estate
Pass$443,683 $547,898 $799,978 $225,257 $225,405 $224,608 $41,072 $2,507,901 
Watch8,052 25,947 13,114 2,662 8,115 7,553 — 65,443 
Substandard31,904 10,489 2,268 11,609 6,390 2,171 — 64,831 
Owner occupied commercial real estate total$483,639 $584,334 $815,360 $239,528 $239,910 $234,332 $41,072 $2,638,175 
Owner occupied commercial real estate charge-offs$— $802 $— $5 $— $63 $— $870 
Non-owner occupied commercial real estate
Pass$480,683 $656,824 $423,420 $203,330 $262,541 $251,499 $26,978 $2,305,275 
Watch71,400 34,651 8,237 3,834 27,345 57,083 — 202,550 
Substandard5,043 952 1,391 — 4,238 34,262 — 45,886 
Non-owner occupied commercial real estate total$557,126 $692,427 $433,048 $207,164 $294,124 $342,844 $26,978 $2,553,711 
Non-owner occupied commercial real estate charge-offs$— $52 $— $29 $399 $147 $— $627 
Real estate construction
Pass$283,519 $468,646 $176,604 $9,889 $11,048 $3,405 $6,486 $959,597 
Watch 629 33,220 9,418 72 — 65 — 43,404 
Substandard— 8,522 — 107 — — 86 8,715 
Real estate construction total$284,148 $510,388 $186,022 $10,068 $11,048 $3,470 $6,572 $1,011,716 
Real estate construction charge-offs$284 $— $— $32 $— $— $— $316 
Agricultural and agricultural real estate
Pass$152,665 $208,375 $114,798 $67,006 $28,247 $43,663 $260,941 $875,695 
Watch2,245 16,257 293 622 70 349 427 20,263 
Substandard12 7,616 1,649 4 855 12,591 499 23,226 
Agricultural and agricultural real estate total$154,922 $232,248 $116,740 $67,632 $29,172 $56,603 $261,867 $919,184 
Agricultural and agricultural real estate charge-offs$— $— $— $9 $— $1 $5,309 $5,319 
Residential real estate
Pass$71,470 $177,564 $241,362 $73,029 $42,526 $155,899 $19,534 $781,384 
Watch171 973 945 659 158 4,845 — 7,751 
Substandard741 150 3,400 464 290 3,649 — 8,694 
Residential real estate total $72,382 $178,687 $245,707 $74,152 $42,974 $164,393 $19,534 $797,829 
Residential real estate charge-offs$— $59 $124 $— $— $— $— $183 
Consumer
Pass$45,595 $62,900 $35,459 $7,731 $3,663 $6,109 $324,218 $485,675 
Watch730 84 694 21 41 644 2,060 4,274 
Substandard80 308 401 75 159 1,769 465 3,257 
Consumer total$46,405 $63,292 $36,554 $7,827 $3,863 $8,522 $326,743 $493,206 
Consumer charge-offs$2 $246 $154 $27 $19 $112 $3,117 $3,677 
Total Pass$2,085,645 $2,901,425 $2,128,112 $773,698 $651,885 $1,012,958 $1,838,626 $11,392,349 
Total Watch103,921 130,920 33,047 11,501 38,127 73,492 31,236 422,244 
Total Substandard 57,951 40,695 11,792 17,706 30,467 61,931 33,510 254,052 
Total Loans$2,247,517 $3,073,040 $2,172,951 $802,905 $720,479 $1,148,381 $1,903,372 $12,068,645 
Total charge-offs$531 $1,953 $958 $1,527 $981 $2,272 $11,392 $19,614