On January 1, 2020, the Company adopted FASB ASU 2016-13, Financial Instruments - Credit Losses, which significantly changed the loan and allowance for credit loss accounting disclosures. The following loan and allowance for credit loss accounting disclosures are presented in accordance with ASC Topic 326.


(Dollars in thousands)	June 30, 2021		December 31, 2020
Residential real estate	$	734,838	802,508
Commercial real estate	6,584,322		6,315,895
Other commercial	2,932,419		3,054,817
Home equity	648,800		636,405
Other consumer	337,669		313,071
Loans receivable	11,238,048		11,122,696
Allowance for credit losses	(151,448)		(158,243)
Loans receivable, net	$	11,086,600	10,964,453
Net deferred origination (fees) costs included in loans receivable	$	(35,391)	(26,709)
Net purchase accounting (discounts) premiums included in loans receivable	$	(13,774)	(17,091)
Accrued interest receivable on loans	$	47,184	53,538

Substantially all of the Company’s loans receivable are with borrowers in the Company’s geographic market areas. Although the Company has a diversified loan portfolio, a substantial portion of borrowers’ ability to service their obligations is dependent upon the economic performance in the Company’s market areas.


	Three Months ended June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Balance at beginning of period	$	156,446	9,018	95,251	39,385	8,068	4,724


Provision for credit losses	(5,723)		884	1,269	(8,319)	(278)	721
Charge-offs	(1,700)		—	(41)	(351)	—	(1,308)
Recoveries	2,425		241	118	1,268	47	751
Balance at end of period	$	151,448	10,143	96,597	31,983	7,837	4,888


	Three Months ended June 30, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Balance at beginning of period	$	150,190	9,315	70,848	56,409	7,934	5,684


Provision for credit losses	13,552		662	18,309	(6,974)	2,174	(619)
Charge-offs	(2,668)		(1)	(150)	(1,088)	(193)	(1,236)
Recoveries	1,435		10	97	491	47	790
Balance at end of period	$	162,509	9,986	89,104	48,838	9,962	4,619


	Six Months ended June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Balance at beginning of period	$	158,243	9,604	86,999	49,133	8,182	4,325


Provision for credit losses	(5,234)		302	8,732	(15,584)	(367)	1,683
Charge-offs	(5,946)		(38)	(41)	(3,113)	(45)	(2,709)
Recoveries	4,385		275	907	1,547	67	1,589
Balance at end of period	$	151,448	10,143	96,597	31,983	7,837	4,888


	Six Months ended June 30, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Balance at beginning of period	$	124,490	10,111	69,496	36,129	4,937	3,817
Impact of adopting CECL	3,720		3,584	10,533	(13,759)	3,400	(38)
Acquisitions	49		—	49	—		—
Provision for credit losses	36,296		(3,707)	8,876	27,159	1,666	2,302
Charge-offs	(5,235)		(21)	(180)	(1,873)	(194)	(2,967)
Recoveries	3,189		19	330	1,182	153	1,505
Balance at end of period	$	162,509	9,986	89,104	48,838	9,962	4,619

During the six months ended June 30, 2021, the ACL decreased primarily as a result of an improvement in the quantitative factors including the economic forecasts along with adjustments to qualitative factors.

The sizeable charge-offs in the other consumer loan segment is driven by deposit overdraft charge-offs which typically experience high charge-off rates and the amounts were comparable to historical trends. The other segments experience routine charge-offs and recoveries, with occasional large credit relationships charge-offs and recoveries that cause fluctuations from prior periods. During the six months ended June 30, 2021, there have been no significant changes to the types of collateral securing collateral-dependent loans.


	June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Accruing loans 30-59 days past due	$	8,677	—	3,230	1,940	1,808	1,699
Accruing loans 60-89 days past due	3,399		233	518	2,299	163	186
Accruing loans 90 days or more past due	4,220		338	2,349	1,234	155	144
Non-accrual loans with no ACL	46,843		2,888	10,648	30,164	2,617	526
Non-accrual loans with ACL	1,207		295	462	343	50	57
Total past due and non-accrual loans	64,346		3,754	17,207	35,980	4,793	2,612
Current loans receivable	11,173,702		731,084	6,567,115	2,896,439	644,007	335,057
Total loans receivable	$	11,238,048	734,838	6,584,322	2,932,419	648,800	337,669


	December 31, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Accruing loans 30-59 days past due	$	17,123	6,058	3,854	4,039	2,130	1,042
Accruing loans 60-89 days past due	5,598		584	2,299	809	756	1,150
Accruing loans 90 days or more past due	1,725		934	231	293	135	132
Non-accrual loans with no ACL	29,532		3,129	14,030	9,231	2,664	478
Non-accrual loans with ACL	2,432		274	1,787	278	49	44
Total past due and non-accrual loans	56,410		10,979	22,201	14,650	5,734	2,846
Current loans receivable	11,066,286		791,529	6,293,694	3,040,167	630,671	310,225
Total loans receivable	$	11,122,696	802,508	6,315,895	3,054,817	636,405	313,071

The Company had $447,000 and $517,000 of interest reversed on non-accrual loans during the six months ended June 30, 2021 and June 30, 2020, respectively. The prior year modifications that were made under the CARES Act, along with related regulatory guidance, are included in current loan receivables.

A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. The collateral on the loans is a significant portion of what secures the collateral-dependent loans and significant changes to the fair value of the collateral can impact the ACL. During 2021, there were no significant change to collateral which secures the collateral-dependent loans, whether due to general deterioration or other reasons. The following table presents the amortized cost basis of collateral-dependent loans by collateral type:


	June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Business assets	$	27,208	—	30	27,178	—	—
Residential real estate	6,727		3,126	807	137	2,480	177
Other real estate	24,830		651	21,313	2,340	187	339
Other	20,345		—	—	19,976	—	369
Total	$	79,110	3,777	22,150	49,631	2,667	885


	December 31, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
Business assets	$	4,325	—	37	4,288	—	—
Residential real estate	7,148		3,338	1,043	198	2,513	56
Other real estate	16,127		64	14,738	1,086	200	39
Other	36,855		—	—	36,469	—	386
Total	$	64,455	3,402	15,818	42,041	2,713	481

A restructured loan is considered a TDR if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented:


	Three Months ended June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
TDRs that occurred during the period
Number of loans	3		—	1	2	—	—
Pre-modification recorded balance	$	615	—	99	516	—	—
Post-modification recorded balance	$	615	—	99	516	—	—
TDRs that subsequently defaulted
Number of loans	—		—	—	—	—	—
Recorded balance	$	—	—	—	—	—	—


	Three Months ended June 30, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
TDRs that occurred during the period
Number of loans	8		1	3	3	1	—
Pre-modification recorded balance	$	1,672	210	1,263	160	39	—
Post-modification recorded balance	$	1,672	210	1,263	160	39	—
TDRs that subsequently defaulted
Number of loans	—		—	—	—	—	—
Recorded balance	$	—	—	—	—	—	—


	Six Months ended June 30, 2021
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
TDRs that occurred during the period
Number of loans	10		1	5	3	—	1
Pre-modification recorded balance	$	2,368	210	1,473	554	—	131
Post-modification recorded balance	$	2,368	210	1,473	554	—	131
TDRs that subsequently defaulted
Number of loans	—		—	—	—	—	—
Recorded balance	$	—	—	—	—	—	—


	Six Months ended June 30, 2020
(Dollars in thousands)	Total		Residential Real Estate	Commercial Real Estate	Other Commercial	Home Equity	Other Consumer
TDRs that occurred during the period
Number of loans	13		1	6	5	1	—
Pre-modification recorded balance	$	8,940	210	8,120	571	39	—
Post-modification recorded balance	$	8,940	210	8,120	571	39	—
TDRs that subsequently defaulted
Number of loans	1		—	1	—	—	—
Recorded balance	$	106	—	106	—	—	—

The modifications for the loans designated as TDRs during the six months ended June 30, 2021 and 2020 included one or a combination of the following: an extension of the maturity date, a reduction of the interest rate or a reduction in the principal amount.

In addition to the loans designated as TDRs during the period provided in the preceding tables, the Company had TDRs with pre-modification loan balances of $1,600,000 and $904,000 for the six months ended June 30, 2021 and 2020, respectively, for which OREO was received in full or partial satisfaction of the loans. The majority of such TDRs were in other commercial for the six months ended June 30, 2021 and commercial real estate for the six months ended June 30, 2020. At June 30, 2021 and December 31, 2020, the Company had $209,000 and $548,000, respectively, of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process. At June 30, 2021 and December 31, 2020, the Company had $88,000 and $273,000, respectively, of OREO secured by residential real estate properties.

The Company also modified loans under the CARES Act, along with related regulatory guidance, that were not classified as TDRs. In addition, the state of Montana created the Montana Loan Deferment Program for only Montana-based business that utilized Cares Act funds to provide interest payments upfront on behalf of participating borrowers. The Montana Loan Deferment Program provided modifications for customers under the CARES Act that were not classified as TDRs.

The Company categorizes commercial real estate and other commercial loans into risk categories based on relevant information about the ability of borrowers to service their obligations. The following tables present the amortized cost in commercial real estate and other commercial loans based on the Company’s internal risk rating. The date of a modification, renewal or extension of a loan is considered for the year of origination if the terms of the loan are as favorable to the Company as the terms are for a comparable loan to other borrowers with similar credit risk.


	June 30, 2021
(Dollars in thousands)	Total		Pass	Special Mention	Substandard	Doubtful/ Loss
Commercial real estate loans
Term loans by origination year
2021 (year-to-date)	$	1,021,389	1,020,590	—	799	—
2020	1,345,598		1,341,472	—	4,126	—
2019	960,097		948,682	—	11,415	—
2018	797,895		757,454	—	40,441	—
2017	585,881		556,345	—	29,536	—
Prior	1,741,920		1,691,966	—	49,868	86
Revolving loans	131,542		128,806	—	2,735	1

Total	$	6,584,322	6,445,315	—	138,920	87
Other commercial loans 1
Term loans by origination year
2021 (year-to-date)	$	766,841	765,356	—	1,485	—
2020	613,476		591,994	—	21,481	1
2019	266,759		258,482	—	8,274	3
2018	201,000		194,842	—	6,157	1
2017	226,830		225,041	—	1,786	3
Prior	357,769		341,707	—	15,511	551
Revolving loans	499,744		471,791	—	27,936	17

Total	$	2,932,419	2,849,213	—	82,630	576


	December 31, 2020
(Dollars in thousands)	Total		Pass	Special Mention	Substandard	Doubtful/ Loss
Commercial real estate loans
Term loans by origination year
2020	$	1,496,094	1,490,947	—	5,147	—
2019	1,077,461		1,069,503	—	7,958	—
2018	914,506		874,673	—	39,833	—
2017	723,448		696,371	—	27,077	—
2016	496,275		481,392	—	14,883	—
Prior	1,488,281		1,450,596	—	37,574	111
Revolving loans	119,830		116,548	—	3,282	—

Total	$	6,315,895	6,180,030	—	135,754	111
Other commercial loans 1
Term loans by origination year
2020	$	1,366,664	1,341,316	19,564	5,784	—
2019	304,430		284,981	12,582	6,864	3
2018	241,222		234,988	—	6,233	1
2017	269,857		264,651	—	5,114	92
2016	179,225		177,164	—	2,056	5
Prior	218,306		206,431	—	11,329	546
Revolving loans	475,113		467,929	54	7,112	18

Total	$	3,054,817	2,977,460	32,200	44,492	665

For residential real estate, home equity and other consumer loan segments, the Company evaluates credit quality primarily on the aging status of the loan. The following tables present the amortized cost in residential real estate, home equity and other consumer loans based on payment performance:


	June 30, 2021
(Dollars in thousands)	Total		Performing	30-89 Days Past Due	Non-Accrual and 90 Days or More Past Due
Residential real estate loans
Term loans by origination year
2021 (year-to-date)	$	121,489	121,489	—	—
2020	205,741		205,741	—	—
2019	101,077		101,077	—	—
2018	67,729		67,445	52	232
2017	58,675		58,495	—	180
Prior	177,776		174,486	181	3,109
Revolving loans	2,351		2,351	—	—

Total	$	734,838	731,084	233	3,521
Home equity loans
Term loans by origination year
2021 (year-to-date)	$	47	47	—	—
2020	69		69	—	—
2019	607		573	—	34
2018	1,093		1,093	—	—
2017	852		827	—	25
Prior	11,616		11,068	24	524
Revolving loans	634,516		630,330	1,947	2,239

Total	$	648,800	644,007	1,971	2,822
Other consumer loans
Term loans by origination year
2021 (year-to-date)	$	98,287	98,258	29	—
2020	100,652		100,363	247	42
2019	48,832		48,485	104	243
2018	27,480		27,170	99	211
2017	11,159		11,115	37	7
Prior	22,098		20,568	1,308	222
Revolving loans	29,161		29,098	61	2

Total	$	337,669	335,057	1,885	727