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Allowance for Credit Losses and Unfunded Commitments and Letters of Credit
 12 Months Ended
Dec. 31, 2021
Allowance For Credit Losses And Unfunded Loan Commitments And Letters Of Credit  
Allowance For Credit Losses And Allowance for Unfunded Commitments And Letters Of Credit Text Block [Text Block] Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit
The ACL is determined through quarterly assessments of the present value of expected future cash flows within the loan portfolio, which is deducted from the loan’s amortized cost basis to determine the expected credit losses of the loan portfolio. We estimate the ACL using relevant and reliable available information, which is derived from both internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Additions to and recaptures from the ACL are charged to current period earnings through the provision for credit losses. Loan amounts that are determined to be uncollectible are charged directly against the ACL and netted against amounts recovered on previously charged-off loans.
For the purpose of calculating portfolio level reserves, we have segmented our loan portfolio into two portfolio segments (Commercial and Consumer). The Commercial and Consumer portfolio segments are then further broken down into loan classes by risk characteristics. The risk characteristics include regulatory call codes, type of industry, risk ratings and collateral type.
The ACL is comprised of reserves measured on a collective (pool) basis using a quantitative DCF model for all loan classes with similar risk characteristics and then qualitatively adjusted for large loan concentrations, policy exceptions granted and other factors. The quantitative DCF model utilizes anticipated period cash flows determined on a loan-level basis. The anticipated cash flows take into account contractual principal and interest payments, anticipated segment level prepayments, probability of defaults and historical loss given defaults. The majority of our loan classes utilize regression models to calculate probability of defaults, in which macroeconomic factors are correlated to historical quarterly defaults. The Commercial segment multi-factor models utilize a mix of 15 macroeconomic factors, including the four most commonly used factors: Real GDP, National Unemployment Rate, Disposable Personal Income and Private Inventories. The Consumer segment multi-factor models utilize a mix of three macroeconomic factors: National Unemployment Rate, Home Price Index and Disposable Income. The Company utilizes an 18 month reasonable and supportable forecast for the macroeconomic factors, after which the probability of default reverts to its historical mean using a straight-line basis constructed on each macroeconomic factor’s absolute historical quarterly change.
Loans are individually measured for credit losses if they do not share similar risk characteristics of other loans within their respective pools. Individually measured loans are primarily nonaccrual and collateral dependent with balances equal to or greater than $500,000 and for which the borrower is experiencing financial difficulty such that full satisfaction of the contractual terms of the loan are in question. Commercial real estate loans are secured by commercial real estate, including owner occupied and non-owner occupied commercial real estate, as well as multifamily residential real estate. Commercial business loans are primarily secured by non-real estate collateral, including equipment and other non-real estate fixed assets, inventory, receivables and cash. Agricultural loans are secured by farmland and other agricultural real estate, as well as equipment, inventory, such as crops and livestock, non-real estate fixed assets and cash. Construction loans are secured by one-to-four family residential real estate and commercial real estate in varying stages of development. One-to-four family residential real estate loans are secured by one-to-four family residential properties. Other consumer loans are secured by personal property. For collateral dependent loans, the Company calculates the allowance as the difference between the amortized cost of the loan and the fair market value of the collateral. The fair market value of the collateral is determined by either the discounted expected future cash flows from the operation of the collateral or the appraised value of the collateral, less costs to sell. If the fair value of the collateral is greater than the amortized cost of the loan, no reserve is recorded.
The Company also records an allowance for credit losses on unfunded loan commitments and letters of credit. We estimate expected credit losses on unfunded commitments in which we are exposed to credit risk, unless we have the option to unconditionally cancel the obligation. Expected credit losses are calculated based on the likelihood that funding will occur and an estimate of what will be funded by analyzing the most recent four-quarter utilization rates, current utilization and our quantitative ACL rate. The allowance for unfunded commitments and letters of credit is included in “Other Liabilities” on the Consolidated Balance Sheets, with changes to the balance being charged to noninterest expense.
We do not measure an allowance for credit losses on accrued interest receivable balances because these balances are written-off in a timely manner as a reduction to interest income when loans are placed on nonaccrual status.
The following tables show a detailed analysis of the ACL for the years ended December 31, 2021, 2020 and 2019:

Beginning BalanceInitial ACL recorded for PCD loans acquired during the periodCharge-offsRecoveriesProvision
(Recapture)		Ending Balance
Year Ended December 31, 2021(in thousands)
Commercial loans:
Commercial real estate
$68,934 $2,225 $(1,044)$633 $(9,494)$61,254 
Commercial business
45,250 30 (6,364)4,862 10,934 54,712 
Agriculture
9,052 38 (322)355 (975)8,148 
Construction
7,636 35 — 593 (2,867)5,397 
Consumer loans:
One-to-four family residential real estate
16,875 286 (170)907 6,225 24,123 
Other consumer
1,393 2 (1,163)735 977 1,944 
Total$149,140 $2,616 $(9,063)$8,085 $4,800 $155,578 

Beginning BalanceImpact of Adopting ASC 326Charge-offsRecoveriesProvision
(Recapture)		Ending Balance
Year Ended December 31, 2020(in thousands)
Commercial loans:
Commercial real estate
$20,340 $7,533 $(1,419)$131 $42,349 $68,934 
Commercial business
30,292 762 (12,396)3,438 23,154 45,250 
Agriculture
15,835 (9,325)(6,427)172 8,797 9,052 
Construction
8,571 (1,750)— 709 106 7,636 
Consumer loans:
One-to-four family residential real estate
7,435 4,237 (84)2,083 3,204 16,875 
Other consumer
883 778 (766)399 99 1,393 
Unallocated612 (603)— — (9)— 
Total$83,968 $1,632 $(21,092)$6,932 $77,700 $149,140 

 Beginning BalanceCharge-offsRecoveriesProvision
(Recapture)		Ending Balance
Year Ended December 31, 2019(in thousands)
Commercial loans:
Commercial real estate
$14,864 $(2,160)$3,377 $4,259 $20,340 
Commercial business
34,658 (11,290)3,066 3,858 30,292 
Agriculture
9,589 (245)299 6,192 15,835 
Construction
14,395 (242)3,641 (9,223)8,571 
Consumer loans:
One-to-four family residential real estate
8,024 (1,196)1,773 (1,166)7,435 
Other consumer
786 (82)165 14 883 
Unallocated1,053 — — (441)612 
Total$83,369 $(15,215)$12,321 $3,493 $83,968 
The $6.4 million increase in the ACL at December 31, 2021 compared to the ACL at December 31, 2020 was primarily due to the increase in the loan portfolio from the Bank of Commerce acquisition as well as loan originations, partially offset by improvement in the overall portfolio credit quality and an improved economic forecast. A primary driver used to establish the December 31, 2021 ACL included a significantly improved forecast of the national unemployment rate throughout the forecast period as compared to prior year, as well as healthy forecasts for disposable personal income and real GDP. The models used for calculating the ACL are sensitive to changes in these and other economic factors, which could result in volatility as these assumptions change over time. The ACL at December 31, 2021 does not include a reserve for the PPP loans as these loans are fully guaranteed by the SBA.
Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows:
Years Ended December 31,
202120202019
(in thousands)
Beginning balance$8,300 $3,430 $4,330 
Impact of Adopting ASC 326— 1,570 — 
Net changes in the allowance for unfunded commitments and letters of credit
200 3,300 (900)
Ending balance$8,500 $8,300 $3,430 
Credit Quality Indicators
The extension of credit in the form of loans or other credit products to consumer and commercial clients is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review, approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower.
We evaluate the credit quality of our loan portfolio using regulatory risk ratings, which are based on relevant information about the borrower’s financial condition, including current financial condition, historical payment experience, credit documentation and current economic trends. Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of the loss on the loan increases. All loans risk rated special mention or worse with amortized costs exceeding $100,000 are reviewed at least quarterly with more frequent review for specific loans.
Pass rated loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reviewed to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating or accrual status may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectible and when identified, are charged-off.
The following is an analysis of the credit quality of our loan portfolio as of December 31, 2021 and 2020:
Revolving Loans Amortized Cost BasisRevolving Loans Converted to Term Loans Amortized Cost Basis
Term Loans
Amortized Cost Basis by Origination Year
20212020201920182017PriorTotal (1)
December 31, 2021(in thousands)
Commercial loans:
Commercial real estate
Pass$1,068,493 $760,545 $650,593 $492,348 $515,233 $1,180,115 $74,754 $3,644 $4,745,725 
Special mention2,252 — 19,016 6,196 163 27,270 — 2,199 57,096 
Substandard4,119 5,897 45,769 9,112 29,917 82,599 1,029 — 178,442 
Total commercial real estate$1,074,864 $766,442 $715,378 $507,656 $545,313 $1,289,984 $75,783 $5,843 $4,981,263 
Commercial business
Pass$891,957 $426,004 $280,823 $217,605 $144,363 $232,356 $1,028,616 $35,411 $3,257,135 
Special mention621 135 6,097 747 105 51 34,256 236 42,248 
Substandard4,329 4,610 18,393 28,066 20,568 27,462 18,796 1,661 123,885 
Total commercial business$896,907 $430,749 $305,313 $246,418 $165,036 $259,869 $1,081,668 $37,308 $3,423,268 
Agriculture
Pass$147,561 $87,964 $74,658 $29,739 $46,058 $79,693 $266,573 $5,448 $737,694 
Special mention162 — 445 — — — 565 — 1,172 
Substandard— 7,717 9,148 1,616 5,532 1,833 29,125 1,878 56,849 
Total agriculture$147,723 $95,681 $84,251 $31,355 $51,590 $81,526 $296,263 $7,326 $795,715 
Construction
Pass$228,661 $53,880 $35,795 $3,183 $3,285 $2,189 $55,765 $— $382,758 
Substandard— — 1,748 — — 249 — — 1,997 
Total construction$228,661 $53,880 $37,543 $3,183 $3,285 $2,438 $55,765 $— $384,755 
Consumer loans:
One-to-four family residential real estate 
Pass$390,153 $140,799 $56,520 $51,549 $32,447 $111,307 $222,747 $1,347 $1,006,869 
Substandard85 470 183 562 234 4,736 485 284 7,039 
Total one-to-four family residential real estate$390,238 $141,269 $56,703 $52,111 $32,681 $116,043 $223,232 $1,631 $1,013,908 
Other consumer
Pass$7,045 $2,711 $1,950 $13,489 $560 $1,277 $15,853 $97 $42,982 
Substandard— — — — 1 13 23 9 46 
Total consumer$7,045 $2,711 $1,950 $13,489 $561 $1,290 $15,876 $106 $43,028 
Total$2,745,438 $1,490,732 $1,201,138 $854,212 $798,466 $1,751,150 $1,748,587 $52,214 $10,641,937 
Less:
Allowance for credit losses155,578 
Loans, net$10,486,359 
_________
(1) Loans that are on short-term deferments are treated as Pass loans and will not be reported as past due provided that they are performing in accordance with the modified terms.
Revolving Loans Amortized Cost BasisRevolving Loans Converted to Term Loans Amortized Cost Basis
Term Loans
Amortized Cost Basis by Origination Year
20202019201820172016PriorTotal
December 31, 2020(in thousands)
Commercial loans:
Commercial real estate
Pass$674,444 $645,328 $478,881 $502,112 $408,972 $946,980 $52,049 $11,332 $3,720,098 
Special mention3,348 39,374 21,285 30,232 46,197 50,115 5 2,139 192,695 
Substandard2,916 24,860 13,571 15,652 43,735 41,138 3,389 4,259 149,520 
Total commercial real estate$680,708 $709,562 $513,737 $547,996 $498,904 $1,038,233 $55,443 $17,730 $4,062,313 
Commercial business
Pass$1,087,400 $366,435 $324,360 $199,010 $218,313 $214,677 $1,000,725 $11,540 $3,422,460 
Special mention3,002 26,361 8,471 24,582 7,004 10,650 22,426 — 102,496 
Substandard3,625 7,376 11,061 5,905 6,396 3,743 32,134 2,772 73,012 
Total commercial business$1,094,027 $400,172 $343,892 $229,497 $231,713 $229,070 $1,055,285 $14,312 $3,597,968 
Agriculture
Pass$142,163 $90,612 $44,434 $58,366 $58,893 $59,396 $244,135 $9,299 $707,298 
Special mention— 90 285 33 — — 85 13 506 
Substandard5,193 12,480 5,868 4,258 284 3,502 38,780 1,458 71,823 
Total agriculture$147,356 $103,182 $50,587 $62,657 $59,177 $62,898 $283,000 $10,770 $779,627 
Construction
Pass$134,693 $66,974 $10,066 $3,498 $763 $1,805 $29,323 $3,753 $250,875 
Substandard— 17,732 — — — 56 — — 17,788 
Total construction$134,693 $84,706 $10,066 $3,498 $763 $1,861 $29,323 $3,753 $268,663 
Consumer loans:
One-to-four family residential real estate
Pass$161,021 $77,756 $62,696 $29,737 $20,889 $78,098 $243,325 $3,655 $677,177 
Special mention— — 332 — — 195 — — 527 
Substandard— 849 227 1,166 344 1,968 1,005 307 5,866 
Total one-to-four family residential real estate$161,021 $78,605 $63,255 $30,903 $21,233 $80,261 $244,330 $3,962 $683,570 
Other consumer
Pass$5,548 $3,109 $3,886 $989 $244 $1,060 $19,911 $474 $35,221 
Substandard30 — — 5 — 170 53 40 298 
Total consumer$5,578 $3,109 $3,886 $994 $244 $1,230 $19,964 $514 $35,519 
Total$2,223,383 $1,379,336 $985,423 $875,545 $812,034 $1,413,553 $1,687,345 $51,041 $9,427,660 
Less:
Allowance for credit losses149,140 
Loans, net$9,278,520