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Loans and Allowance for Credit Losses (Tables)
 12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Schedule of Composition of Loan Portfolio by Loan Class
The following table illustrates the composition of the Corporation’s loan portfolio by loan class for the periods indicated:
December 31, 2021December 31, 2020
Commercial and industrial loans$2,714,565 $2,776,699 
Agricultural land, production and other loans to farmers246,442 281,884 
Real estate loans:
Construction523,066 484,723 
Commercial real estate, non-owner occupied2,135,459 2,220,949 
Commercial real estate, owner occupied986,720 958,501 
Residential1,159,127 1,234,741 
Home equity523,754 508,259 
Individuals' loans for household and other personal expenditures146,092 129,479 
Public finance and other commercial loans806,636 647,939 
Loans$9,241,861 $9,243,174 
Schedule of Credit Quality of Loan Portfolio by Loan Class
The following tables summarize the risk grading of the Corporation’s loan portfolio by loan class and by year of origination for the years indicated. Consumer loans are not risk graded. For the purposes of this disclosure, the consumer loans are classified in the following manner: loans that are less than 30 days past due are Pass, loans 30-89 days past due are Special Mention and loans greater than 89 days past due are Substandard. The entire balance of a loan is considered delinquent if the minimum payment contractually required to be made is not received by the specified due date. Loans that evidenced deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected are included in the applicable categories below. Commercial and industrial loan balances as of December 31, 2021 with an origination year of 2021 and 2020 include PPP loans of $100.3 million and $6.3 million, respectively.


Term Loans (amortized cost basis by origination year)
20212020201920182017PriorRevolving loans amortized cost basisRevolving loans converted to termTotal
Commercial and industrial loans
Pass$1,019,757 $362,372 $144,520 $65,165 $21,575 $30,420 $990,335 $— $2,634,144 
Special Mention10,559 11,088 190 730 1,930 1,825 15,026 — 41,348 
Substandard2,811 2,127 7,432 2,932 431 747 22,593 — 39,073 
Total Commercial and industrial loans1,033,127 375,587 152,142 68,827 23,936 32,992 1,027,954 — 2,714,565 
Agricultural land, production and other loans to farmers
Pass50,251 45,164 22,195 7,689 6,153 36,074 74,871 — 242,397 
Special Mention— 1,543 — — — 252 264 — 2,059 
Substandard524 506 108 371 — 27 450 — 1,986 
Total Agricultural land, production and other loans to farmers50,775 47,213 22,303 8,060 6,153 36,353 75,585 — 246,442 
Real estate loans:
Construction
Pass215,167 200,169 63,589 979 1,762 2,453 17,201 — 501,320 
Special Mention20,737 270 — — — 46 — — 21,053 
Substandard— 693 — — — — — — 693 
Total Construction235,904 201,132 63,589 979 1,762 2,499 17,201 — 523,066 
Commercial real estate, non-owner occupied
Pass589,296 688,406 227,332 111,971 103,400 126,837 26,779 — 1,874,021 
Special Mention68,279 149,480 — — — 1,723 — — 219,482 
Substandard19,314 14,912 178 1,118 6,156 278 — — 41,956 
Total Commercial real estate, non-owner occupied676,889 852,798 227,510 113,089 109,556 128,838 26,779 — 2,135,459 
Commercial real estate, owner occupied
Pass299,186 392,383 92,338 43,252 46,044 48,571 33,998 — 955,772 
Special Mention5,665 5,953 738 1,532 902 1,301 149 — 16,240 
Substandard7,025 5,763 — 53 113 1,754 — — 14,708 
Total Commercial real estate, owner occupied311,876 404,099 93,076 44,837 47,059 51,626 34,147 — 986,720 
Residential
Pass349,726 353,691 103,028 69,745 55,240 210,669 2,955 73 1,145,127 
Special Mention1,034 1,394 1,456 306 172 2,106 — — 6,468 
Substandard1,004 1,575 335 1,248 108 3,257 — 5 7,532 
Total Residential351,764 356,660 104,819 71,299 55,520 216,032 2,955 78 1,159,127 
Home equity
Pass63,845 17,556 1,977 2,127 1,250 3,432 427,437 194 517,818 
Special Mention— 85 48 — — 24 3,451 — 3,608 
Substandard520 — — 8 91 70 1,639 — 2,328 
Total Home Equity64,365 17,641 2,025 2,135 1,341 3,526 432,527 194 523,754 
Individuals' loans for household and other personal expenditures
Pass67,749 23,452 11,893 11,197 2,008 4,928 24,406 — 145,633 
Special Mention79 85 50 33 20 58 134 — 459 
Substandard— — — — — — — — — 
Total Individuals' loans for household and other personal expenditures67,828 23,537 11,943 11,230 2,028 4,986 24,540 — 146,092 
Public finance and other commercial loans
Pass231,319 178,316 100,679 39,098 105,964 128,942 22,318 — 806,636 
Total Public finance and other commercial loans231,319 178,316 100,679 39,098 105,964 128,942 22,318 — 806,636 
Loans$3,023,847 $2,456,983 $778,086 $359,554 $353,319 $605,794 $1,664,006 $272 $9,241,861 
December 31, 2020
Commercial
Pass		Commercial
Special
Mention		Commercial SubstandardCommercial
Doubtful		Commercial LossConsumer PerformingConsumer
Non-Performing		Total
Commercial and industrial loans$2,562,077 $117,503 $97,119 $— $— $— $— $2,776,699 
Agricultural land, production and other loans to farmers243,991 26,835 9,885 — — 1,173 — 281,884 
Real estate loans:
Construction446,846 10,445 5,549 — — 21,763 120 484,723 
Commercial real estate, non-owner occupied1,979,827 160,304 80,818 — — — — 2,220,949 
Commercial real estate, owner occupied907,566 17,641 33,294 — — — — 958,501 
Residential199,338 2,261 7,058 — — 1,020,687 5,397 1,234,741 
Home equity12,714 — 989 — — 492,999 1,557 508,259 
Individuals' loans for household and other personal expenditures— — — — — 129,440 39 129,479 
Public finance and other commercial loans647,939 — — — — — — 647,939 
Loans$7,000,298 $334,989 $234,712 $— $— $1,666,062 $7,113 $9,243,174 
The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses:
December 31, 2021
Commercial Real EstateResidential Real EstateOtherTotalAllowance on Collateral Dependent Loans
Commercial and industrial loans$— $— $8,075 $8,075 $2,672 
Agricultural land, production and other loans to farmers524 — 251 775 — 
Real estate loans:
Construction— 685 — 685 82 
Commercial real estate, non-owner occupied23,652 — — 23,652 5,510 
Commercial real estate, owner occupied1,044 — — 1,044 — 
Residential— 4,906 — 4,906 305 
Home equity— 394 — 394 64 
Loans$25,220 $5,985 $8,326 $39,531 $8,633 
Schedule of Past Due Aging of Loan Portfolio by Loan Class The tables below show a past due aging of the Corporation’s loan portfolio, by loan class, for the years indicated:
December 31, 2021
Current30-59 Days
Past Due		60-89 Days
Past Due		90 Days or More Past DueTotalLoans > 90 Days or More Past Due
And Accruing
Commercial and industrial loans$2,708,539 $2,602 $2,437 $987 $2,714,565 $675 
Agricultural land, production and other loans to farmers246,380 36 — 26 246,442 — 
Real estate loans:
Construction522,349 717 — — 523,066 — 
Commercial real estate, non-owner occupied2,124,853 3,327 — 7,279 2,135,459 — 
Commercial real estate, owner occupied985,785 643 — 292 986,720 — 
Residential1,148,294 3,979 4,255 2,599 1,159,127 — 
Home equity518,643 3,327 281 1,503 523,754 288 
Individuals' loans for household and other personal expenditures145,634 375 83 — 146,092 — 
Public finance and other commercial loans806,636 — — — 806,636 — 
Loans$9,207,113 $15,006 $7,056 $12,686 $9,241,861 $963 


December 31, 2020
Current30-59 Days
Past Due		60-89 Days
Past Due		90 Days or More Past DueTotalLoans > 90 Days or More Past Due
And Accruing
Commercial and industrial loans$2,761,473 $5,866 $6,571 $2,789 $2,776,699 $594 
Agricultural land, production and other loans to farmers280,615 146 226 897 281,884 — 
Real estate loans:
Construction484,706 — 17 — 484,723 — 
Commercial real estate, non-owner occupied2,184,681 2,525 2,109 31,634 2,220,949 — 
Commercial real estate, owner occupied951,561 4,854 180 1,906 958,501 — 
Residential1,226,779 3,269 1,429 3,264 1,234,741 133 
Home equity503,596 2,644 559 1,460 508,259 19 
Individuals' loans for household and other personal expenditures129,049 334 96 — 129,479 — 
Public finance and other commercial loans647,939 — — — 647,939 — 
Loans$9,170,399 $19,638 $11,187 $41,950 $9,243,174 $746 
Schedule of Non-Accrual Loans by Loan class
The following table summarizes the Corporation’s non-accrual loans by loan class for the periods indicated:

December 31, 2021December 31, 2020
Non-Accrual LoansNon-Accrual Loans with no Allowance for Credit LossesNon-Accrual Loans
Commercial and industrial loans$7,598 $263 $2,329 
Agricultural land, production and other loans to farmers631 5241,012 
Real estate loans:
Construction685 — 123 
Commercial real estate, non-owner occupied23,029 6,13346,316 
Commercial real estate, owner occupied411 — 3,040 
Residential9,153 2,1606,517 
Home equity1,552 — 2,095 
Individuals' loans for household and other personal expenditures3 — 39 
Loans$43,062 $9,080 $61,471 
Schedule of Troubled Debt Restructuring
The following tables summarize troubled debt restructures in the Corporation's loan portfolio that occurred during the twelve months ended December 31, 2021 and 2020, respectively.

Twelve Months Ended December 31, 2021
Pre- Modification Recorded BalanceTerm ModificationRate ModificationCombinationPost - Modification Recorded BalanceNumber of Loans
Commercial and industrial loans$348 $348 $— $— $348 2
Real estate loans:
Construction16 — 16— 161
Commercial real estate, non owner occupied12,922 12,976 — — 12,976 1
Commercial real estate, owner occupied5129 — 21502
Residential6914491261186939
Total$14,028 $13,802 $142 $139 $14,083 15 


Twelve Months Ended December 31, 2020
Pre- Modification Recorded BalanceTerm ModificationRate ModificationCombinationPost - Modification Recorded BalanceNumber of Loans
Commercial and industrial loans$654 $654 $— $— $654 3
Agricultural land, production and other loans to farmers458458— — 4581
Real estate loans:
Construction113— — 1231231
Commercial real estate, owner occupied107107— — 1071
Residential2,730 2,393 1632242,780 38
Home Equity33223795— 3323
Individuals' loans for household and other personal expenditures1919— — 192
Total$4,413 $3,868 $258 $347 $4,473 49 
The following tables summarize troubled debt restructures that occurred during the twelve months ended December 31, 2021 and 2020, that subsequently defaulted during the period indicated and remained in default at period end. For purposes of this schedule, a loan is considered in default if it is 30-days or more past due.
Twelve Months Ended December 31, 2021
Number of LoansRecorded Balance
Real estate loans:
Residential5 $475 
Total5 $475 
Twelve Months Ended December 31, 2020
Number of LoansRecorded Balance
Commercial and industrial loans2 $585 
Real estate loans:
Residential8 610 
Home equity1 93 
Total11 $1,288 
Schedule of Changes in Allowance for Loan Losses
The following tables summarize changes in the allowance for credit losses by loan segment for the twelve months ended December 31, 2021:

Twelve Months Ended December 31, 2021
CommercialCommercial Real EstateConstructionConsumerResidentialConsumer & ResidentialTotal
Allowance for credit losses
Balances, December 31, 2020$47,115 $51,070 $— $9,648 $22,815 $— $130,648 
Credit risk reclassifications— (10,284)10,284 (9,648)(22,815)32,463 — 
Balances, December 31, 2020 after reclassifications47,115 40,786 10,284 — — 32,463 130,648 
Impact of adopting ASC 32620,024 34,925 8,805 — — 10,301 74,055 
Balances, January 1, 2021 Post-ASC 326 adoption67,139 75,711 19,089 — — 42,764 204,703 
Provision for credit losses7,921 (11,093)1,122 — — 2,050 — 
Recoveries on loans724 580 1 — — 1,273 2,578 
Loans charged off(5,849)(4,533)(6)— — (1,496)(11,884)
Balances, December 31, 2021$69,935 $60,665 $20,206 $— $— $44,591 $195,397 
Allowance for Loan Losses under prior GAAP ("Incurred Loss Model")

Prior to the adoption of ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments on January 1, 2021, the Corporation maintained an allowance for loan losses in accordance with the incurred loss model as disclosed in the Corporation's 2020 Annual Report on Form 10-K.

The following tables summarize changes in the allowance for loan losses by loan segment for the twelve months ended December 31, 2020 and 2019:
Twelve Months Ended December 31, 2020
CommercialCommercial
Real Estate		ConsumerResidentialTotal
Allowance for loan losses:
Balances, December 31, 2019$32,902 $28,778 $4,035 $14,569 $80,284 
Provision for losses21,930 22,174 5,996 8,573 58,673 
Recoveries on loans819 431 260 666 2,176 
Loans charged off(8,536)(313)(643)(993)(10,485)
Balances, December 31, 2020$47,115 $51,070 $9,648 $22,815 $130,648 


Twelve Months Ended December 31, 2019
CommercialCommercial Real EstateConsumerResidentialTotal
Allowance for loan losses:
Balances, December 31, 2018$32,657 $29,609 $3,964 $14,322 $80,552 
Provision for losses733 1,555 239 273 2,800 
Recoveries on loans1,244 1,289 401 619 3,553 
Loans charged off(1,732)(3,675)(569)(645)(6,621)
Balances, December 31, 2019$32,902 $28,778 $4,035 $14,569 $80,284 
Schedule of Allowance for Credit Losses and Loan Portfolio by Loan Segment The table below shows the Corporation’s allowance for loan losses under the incurred loss model and loan portfolio by loan segment as of December 31, 2020.
December 31, 2020
CommercialCommercial
Real Estate		ConsumerResidentialTotal
Allowance Balances:
Individually evaluated for impairment$223 $12,246 $— $432 $12,901 
Collectively evaluated for impairment46,892 38,824 9,648 22,383 117,747 
Total Allowance for Loan Losses$47,115 $51,070 $9,648 $22,815 $130,648 
Loan Balances:
Individually evaluated for impairment$1,258 $51,605 $2 $3,291 $56,156 
Collectively evaluated for impairment3,505,863 3,805,808 129,477 1,739,709 9,180,857 
Loans acquired with deteriorated credit quality577 5,584 — — 6,161 
Loans$3,507,698 $3,862,997 $129,479 $1,743,000 $9,243,174 
Schedule of Composition of Impaired Loans by Loan Class
The following tables show the composition of the Corporation’s impaired loans and related allowance by loan class under the incurred loss model and the interest income recognized for the periods indicated:
December 31, 2020
Unpaid
Principal
Balance		Recorded
Investment		Related
Allowance
Impaired loans with no related allowance:
Commercial and industrial loans$1,059 $991 $— 
Real estate Loans:
Commercial real estate, non-owner occupied4,958 4,694 — 
Commercial real estate, owner occupied2,125 1,310 — 
Residential957 816 — 
Individuals' loans for household and other personal expenditures2 2 — 
Total$9,101 $7,813 $— 
Impaired loans with related allowance:
Commercial and industrial loans$268 $268 $223 
Agricultural land, production and other loans to farmers640 562 3 
Real estate Loans:
Commercial real estate, non-owner occupied44,016 43,715 11,686 
Commercial real estate, owner occupied2,061 1,323 557 
Residential2,041 2,014 352 
Home equity487 461 80 
Total$49,513 $48,343 $12,901 
Total Impaired Loans$58,614 $56,156 $12,901 


December 31, 2019
Unpaid Principal
Balance		Recorded
Investment		Related
Allowance
Impaired loans with no related allowance:
Commercial and industrial loans$320 $320 $— 
Agricultural land, production and other loans to farmers752 381 — 
Real estate loans:
Construction1,206 970 — 
Commercial real estate, non-owner occupied6,202 5,299 — 
Commercial real estate, owner occupied1,382 306 — 
Residential93 76 — 
Total$9,955 $7,352 $— 
Impaired loans with related allowance:
Agricultural land, production and other loans to farmers588 585 107 
Real estate loans:
Commercial real estate, owner occupied2,060 1,324 124 
Residential2,070 2,044 383 
Home equity41740075
Individuals' loans for household and other personal expenditures4 4 — 
Total$5,139 $4,357 $689 
Total Impaired Loans$15,094 $11,709 $689 
Twelve Months Ended December 31, 2020
Average
Recorded Investment		Interest
Income Recognized
Impaired loans with no related allowance:
Commercial and industrial loans$991 $— 
Real estate Loans:
Commercial real estate, non-owner occupied4,850 145 
Commercial real estate, owner occupied 1,429 — 
Residential840 3 
Individuals' loans for household and other personal expenditures3 — 
Total$8,113 $148 
Impaired loans with related allowance:
Commercial and industrial loans$267 $— 
Agricultural land, production and other loans to farmers589 — 
Real estate Loans:
Commercial real estate, non-owner occupied 44,119 — 
Commercial real estate, owner occupied 1,447 — 
Residential2,108 70 
Home equity473 14 
Total$49,003 $84 
Total Impaired Loans$57,116 $232 


Twelve Months Ended December 31, 2019
Average Recorded InvestmentInterest Income Recognized
Impaired loans with no related allowance:
Commercial and industrial loans$320 $— 
Agricultural land, production and other loans to farmers542 — 
Real estate loans:
Construction1,229 — 
Commercial real estate, non-owner occupied5,399 156 
Commercial real estate, owner occupied357 — 
Residential77 3 
Total$7,924 $159 
Impaired loans with related allowance:
Agricultural land, production and other loans to farmers585 — 
Real estate loans:
Commercial real estate, owner occupied1,324 — 
Residential2,083 63 
Home equity409 12 
Individuals' loans for household and other personal expenditures4 — 
Total$4,405 $75 
Total Impaired Loans$12,329 $234 
Schedule of Financial Instruments with Off-balance Sheet Risk
Financial instruments with off-balance sheet risk were as follows:
December 31, 2021December 31, 2020
Amounts of commitments:
Loan commitments to extend credit$3,917,215 $3,443,514 
Standby letters of credit$34,613 $29,555 
Schedule of Allowance for Credit Losses, Off-balance Sheet
The following table details activity in the allowance for credit losses on off-balance sheet commitments:
Twelve Months Ended December 31, 2021
Balances, January 1, 2021$20,500 
Provision for credit losses— 
Balances, December 31, 2021$20,500