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Loans and Allowance (Tables)
3 Months Ended
Mar. 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:
March 31, 2021December 31, 2020
Commercial and industrial loans$2,876,212 $2,776,699 
Agricultural land, production and other loans to farmers245,631 281,884 
Real estate loans:
Construction541,224 484,723 
Commercial real estate, non-owner occupied2,178,832 2,220,949 
Commercial real estate, owner occupied950,038 958,501 
Residential1,239,925 1,234,741 
Home equity482,229 508,259 
Individuals' loans for household and other personal expenditures126,387 129,479 
Public finance and other commercial loans677,750 647,939 
Loans$9,318,228 $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. Outstanding loan balances as of March 31, 2021 with an origination year of 2021 and 2020 include PPP loans of $293.1 million and $448.6 million, respectively.

Term Loans (amortized cost basis by origination year)
20212020201920182017PriorRevolving loans amortized cost basisTotal
Commercial and industrial loans
Pass$451,747 $1,101,622 $265,685 $121,416 $47,101 $64,093 $634,146 $2,685,810 
Special Mention7,735 50,704 1,421 7,435 2,306 2,326 29,255 101,182 
Substandard1,891 4,946 6,319 606 469 1,394 73,595 89,220 
Total Commercial and industrial loans$461,373 $1,157,272 $273,425 $129,457 $49,876 $67,813 $736,996 $2,876,212 
Agricultural land, production and other loans to farmers
Pass22,570 58,620 26,146 11,864 8,821 49,646 45,626 223,293 
Special Mention151 621 186 2,151 — 3,347 8,824 15,280 
Substandard— 4,116 64 125 717 877 1,159 7,058 
Total Agricultural land, production and other loans to farmers$22,721 $63,357 $26,396 $14,140 $9,538 $53,870 $55,609 $245,631 
Real estate loans:
Construction
Pass60,800 208,852 165,903 68,816 3,104 1,945 17,184 526,604 
Special Mention— 10,118 — 63 — — 30 10,211 
Substandard4,391 — — — — 18 — 4,409 
Total Construction$65,191 $218,970 $165,903 $68,879 $3,104 $1,963 $17,214 $541,224 
Commercial real estate, non-owner occupied
Pass93,726 933,226 275,343 225,971 141,947 196,284 25,454 1,891,951 
Special Mention9,544 169,291 13,242 990 — 112 1,250 194,429 
Substandard238 38,545 24,741 11,585 7,840 9,503 — 92,452 
Total Commercial real estate, non-owner occupied$103,508 $1,141,062 $313,326 $238,546 $149,787 $205,899 $26,704 $2,178,832 
Commercial real estate, owner occupied
Pass51,710 481,355 122,017 57,531 60,587 89,802 39,729 902,731 
Special Mention45 10,174 2,606 1,646 2,242 1,178 149 18,040 
Substandard5,079 19,107 154 2,179 723 1,979 — 29,221 
Loss46 — — — — — — 46 
Total Commercial real estate, owner occupied$56,880 $510,636 $124,777 $61,356 $63,552 $92,959 $39,878 $950,038 
Residential
Pass171,109 398,112 148,457 101,627 88,700 314,130 3,873 1,226,008 
Special Mention349 982 — 588 82 1,313 93 3,407 
Substandard485 3,152 518 1,355 372 4,628 — 10,510 
Total Residential$171,943 $402,246 $148,975 $103,570 $89,154 $320,071 $3,966 $1,239,925 
Home equity
Pass2,673 20,032 2,577 2,930 1,786 5,085 442,166 477,249 
Special Mention— 91 — — — 59 2,588 2,738 
Substandard403 151 — 13 129 195 1,351 2,242 
Total Home Equity$3,076 $20,274 $2,577 $2,943 $1,915 $5,339 $446,105 $482,229 
Individuals' loans for household and other personal expenditures
Pass16,786 38,678 24,201 18,482 4,383 7,550 15,996 126,076 
Special Mention— 68 75 35 33 223 
Substandard— 87 — — — — 88 
Total Individuals' loans for household and other personal expenditures$16,786 $38,747 $24,363 $18,517 $4,391 $7,583 $16,000 $126,387 
Public finance and other commercial loans
Pass21,613 191,808 128,844 39,837 130,856 151,403 13,389 677,750 
Total Public finance and other commercial loans$21,613 $191,808 $128,844 $39,837 $130,856 $151,403 $13,389 $677,750 
Loans$923,091 $3,744,372 $1,208,586 $677,245 $502,173 $906,900 $1,355,861 $9,318,228 
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 production financing 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 1666062$7,113 $9,243,174 
Schedule of changes in allowance for loan losses
The following tables summarize changes in the allowance for credit losses by loan segment for the three months ended March 31, 2021:

Three Months Ended March 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 losses(932)(1,701)1,095 — — 1,538 — 
Recoveries on loans188 164 — — — 342 694 
Loans charged off(673)(3,313)(2)— — (327)(4,315)
Balances, March 31, 2021$65,722 $70,861 $20,182 $— $— $44,317 $201,082 


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 three months ended March 31, 2020:
Three Months Ended March 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 losses5,701 9,194 1,924 2,933 19,752 
Recoveries on loans443 118 42 70 673 
Loans charged off(615)(183)(249)(208)(1,255)
Balances, March 31, 2020$38,431 $37,907 $5,752 $17,364 $99,454 
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:
March 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$2,870,436 $4,545 $19 $1,212 $2,876,212 $— 
Agricultural land, production and other loans to farmers244,403 114 — 1,114 245,631 — 
Real estate loans:
Construction540,648 560 — 16 541,224 — 
Commercial real estate, non-owner occupied2,094,103 45,942 434 38,353 2,178,832 — 
Commercial real estate, owner occupied946,423 792 1,096 1,727 950,038 1,032 
Residential1,234,473 1,582 377 3,493 1,239,925 — 
Home equity477,927 1,906 1,010 1,386 482,229 60 
Individuals' loans for household and other personal expenditures126,075 181 42 89 126,387 
Public finance and other commercial loans677,750 — — — 677,750 — 
Loans$9,212,238 $55,622 $2,978 $47,390 $9,318,228 $1,093 


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:

March 31, 2021December 31, 2020
Non-Accrual LoansNon-Accrual Loans with no Allowance for Credit LossesNon-Accrual Loans
Commercial and industrial loans$1,671 $786 $2,329 
Agricultural land, production and other loans to farmers1,220 561 1,012 
Real estate loans:
Construction18 — 123 
Commercial real estate, non-owner occupied44,143 1,853 46,316 
Commercial real estate, owner occupied1,760 1,513 3,040 
Residential6,336 835 6,517 
Home equity2,650 — 2,095 
Individuals' loans for household and other personal expenditures125 — 39 
Loans$57,923 $5,548 $61,471 
Schedule of amortized cost basis of collateral dependent loans
The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses:
March 31, 2021
Commercial Real EstateResidential Real EstateOtherTotal Allowance on Collateral Dependent Loans
Commercial and industrial loans$— $— $2,202 $2,202 $— 
Agricultural land, production and other loans to farmers780 — — 780 — 
Real estate loans:
Commercial real estate, non-owner occupied45,188 — — 45,188 5,561 
Commercial real estate, owner occupied3,539 — — 3,539 — 
Residential— 3,113 — 3,113 356 
Home equity— 452 — 452 77 
Individuals' loans for household and other personal expenditures— — — 
Loans$49,507 $3,565 $2,204 $55,276 $5,994 
Schedules of troubled debt restructurings
The following tables summarize troubled debt restructures in the Corporation's loan portfolio that occurred during the three months ended March 31, 2021. No troubled debt restructures in the Corporation's loan portfolio occurred in the three months ended March 31, 2020.

Three Months Ended March 31, 2021
Pre- Modification Recorded BalanceTerm ModificationRate ModificationCombinationPost - Modification Recorded BalanceNumber of Loans
Commercial and industrial $348 $348 $— $— $348 2
Real estate loans:
Residential6253831261186277
Total$973 $731 $126 $118 $975 9
The following tables summarize troubled debt restructures that occurred during the twelve months ended March 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.
Three Months Ended March 31, 2021
Number of LoansRecorded Balance
Real estate loans:  
Residential$197 
Home equity91 
Individuals' loans for household and other personal expenditures
Total$290 


Three Months Ended March 31, 2020
Number of LoansRecorded Balance
Real estate loans:  
Residential$22 
Total$22 
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 the periods indicated.
 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 $$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, related allowance under the incurred loss model and interest income recognized while impaired by loan class as of 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 occupied 2,125 1,310 — 
Residential957 816 — 
Individuals' loans for household and other personal expenditures— 
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 
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 


 Three Months Ended March 31, 2020
 Average
Recorded Investment
Interest
Income Recognized
Impaired loans with no related allowance:  
Commercial and industrial loans$905 $— 
Real estate Loans:
Construction1,015 — 
Commercial and farmland6,852 37 
Residential59 
Individuals' loans for household and other personal expenditures— 
Total$8,834 $38 
Impaired loans with related allowance:
Real estate Loans:
Commercial and farmland$2,400 $— 
Residential2,180 19 
Home equity393 
Total$4,973 $22 
Total Impaired Loans$13,807 $60 
Schedule of financial instruments with off-balance sheet risk
Financial instruments with off-balance sheet risk were as follows:
March 31, 2021December 31, 2020
Amounts of commitments:
Loan commitments to extend credit$3,657,931 $3,443,514 
Standby letters of credit$33,610 $29,555 
Schedule of allowance for credit losses, off-balance sheet
The following table details activity in the allowance for credit losses on off-balance sheet commitments:
Three Months Ended
March 31, 2021
Balances, December 31, 2020$— 
Impact of adopting ASC 32620,500 
Provision for credit losses— 
Balances, March 31, 2021$20,500