Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI (Tables)

3 Months Ended

Mar. 31, 2021

Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]

Loan Portfolio Held for Investment

At March 31, 2021 and December 31, 2020, LHFI consisted of the following ($ in thousands):

	March 31, 2021		December 31, 2020
Loans secured by real estate:
Construction, land development and other land	$	542,902	$	514,056
Other secured by 1-4 family residential properties		509,732		524,732
Secured by nonfarm, nonresidential properties		2,799,195		2,709,026
Other real estate secured		1,135,005		1,065,964
Other loans secured by real estate:
Other construction		799,186		794,983
Secured by 1-4 family residential properties		1,233,050		1,216,400
Commercial and industrial loans		1,323,277		1,309,078
Consumer loans		155,356		164,386
State and other political subdivision loans		1,036,694		1,000,776
Other commercial loans		449,307		525,123
LHFI		9,983,704		9,824,524
Less ACL		109,191		117,306
Net LHFI	$	9,874,513	$	9,707,218

Schedule of Amortized Cost Basis of Loans on Nonaccrual Status

The following tables provide the amortized cost basis of loans on nonaccrual status and loans past due 90 days or more still accruing interest at March 31, 2021 and December 31, 2020 ($ in thousands):

	March 31, 2021
	Nonaccrual With No ACL		Total Nonaccrual		Loans Past Due 90 Days or More Still Accruing
Loans secured by real estate:
Construction, land development and other land	$	5,885	$	6,109	$	—
Other secured by 1-4 family residential properties		1,629		3,964		7
Secured by nonfarm, nonresidential properties		12,617		15,695		—
Other real estate secured		58		183		—
Other loans secured by real estate:
Other construction		—		—		—
Secured by 1-4 family residential properties		—		15,036		2,368
Commercial and industrial loans		1,176		12,776		—
Consumer loans		—		71		218
State and other political subdivision loans		—		3,914		—
Other commercial loans		—		5,766		—
Total	$	21,365	$	63,514	$	2,593

	December 31, 2020
	Nonaccrual With No ACL		Total Nonaccrual		Loans Past Due 90 Days or More Still Accruing
Loans secured by real estate:
Construction, land development and other land	$	5,756	$	5,985	$	—
Other secured by 1-4 family residential properties		1,895		4,487		79
Secured by nonfarm, nonresidential properties		12,037		15,197		—
Other real estate secured		60		185		—
Other loans secured by real estate:
Other construction		—		—		—
Secured by 1-4 family residential properties		—		11,807		1,257
Commercial and industrial loans		12,665		15,618		—
Consumer loans		—		86		240
State and other political subdivision loans		—		3,970		—
Other commercial loans		—		5,793		—
Total	$	32,413	$	63,128	$	1,576

Aging Analysis of Past Due LHFI by Loan Type

The following tables provide an aging analysis of the amortized cost basis of past due LHFI at March 31, 2021 and December 31, 2020 ($ in thousands):

	March 31, 2021
	Past Due
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Current Loans		Total LHFI
Loans secured by real estate:
Construction, land development and other land	$	679	$	76	$	5,718	$	6,473	$	536,429	$	542,902
Other secured by 1-4 family residential properties		1,385		1,144		754		3,283		506,449		509,732
Secured by nonfarm, nonresidential properties		1,145		24		1,015		2,184		2,797,011		2,799,195
Other real estate secured		99		—		125		224		1,134,781		1,135,005
Other loans secured by real estate:
Other construction		—		—		—		—		799,186		799,186
Secured by 1-4 family residential properties		1,929		1,720		8,457		12,106		1,220,944		1,233,050
Commercial and industrial loans		1,681		3,068		1,825		6,574		1,316,703		1,323,277
Consumer loans		825		91		218		1,134		154,222		155,356
State and other political subdivision loans		87		—		177		264		1,036,430		1,036,694
Other commercial loans		133		68		5,311		5,512		443,795		449,307
Total	$	7,963	$	6,191	$	23,600	$	37,754	$	9,945,950	$	9,983,704

	December 31, 2020
	Past Due
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Current Loans		Total LHFI
Loans secured by real estate:
Construction, land development and other land	$	339	$	34	$	161	$	534	$	513,522	$	514,056
Other secured by 1-4 family residential properties		1,505		523		896		2,924		521,808		524,732
Secured by nonfarm, nonresidential properties		920		—		972		1,892		2,707,134		2,709,026
Other real estate secured		103		101		107		311		1,065,653		1,065,964
Other loans secured by real estate:
Other construction		—		—		—		—		794,983		794,983
Secured by 1-4 family residential properties		3,291		1,289		5,110		9,690		1,206,710		1,216,400
Commercial and industrial loans		271		196		1,543		2,010		1,307,068		1,309,078
Consumer loans		926		190		240		1,356		163,030		164,386
State and other political subdivision loans		117		—		177		294		1,000,482		1,000,776
Other commercial loans		2,143		2,971		346		5,460		519,663		525,123
Total	$	9,615	$	5,304	$	9,552	$	24,471	$	9,800,053	$	9,824,524

Impact of Modifications Classified as Troubled Debt Restructurings

The following table illustrates the impact of modifications classified as TDRs for the periods presented ($ in thousands):

	Three Months Ended March 31,
	2021						2020
	Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment		Number of Contracts		Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
Loans secured by real estate:
Other secured by 1-4 family residential    properties		2	$	126	$	126		5	$	501	$	501
Commercial and industrial loans		1		14		14		2		1,582		1,582
Consumer loans		—		—		—		4		20		20
Total		3	$	140	$	140		11	$	2,103	$	2,103

Troubled Debt Restructuring Subsequently Defaulted

The table below includes the balances at default for TDRs modified within the last 12 months for which there was a payment default during the periods presented ($ in thousands):

	Three Months Ended March 31,
	2021				2020
	Number of Contracts		Recorded Investment		Number of Contracts		Recorded Investment
Loans secured by real estate:
Other secured by 1-4 family residential properties		3	$	156		3	$	446
Secured by nonfarm, nonresidential properties		1		139		—		—
Commercial and industrial loans		—		—		3		194
Total		4	$	295		6	$	640

Troubled Debt Restructuring Related to Loans Held for Investment by Loan Type

The following tables detail LHFI classified as TDRs by loan class at March 31, 2021 and 2020 ($ in thousands):

	March 31, 2021
	Accruing		Nonaccrual		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	11	$	11
Other secured by 1-4 family residential properties		42		3,644		3,686
Secured by nonfarm, nonresidential properties		—		3,846		3,846
Commercial and industrial loans		1,500		10,073		11,573
Consumer loans		—		15		15
State and other political subdivision loans		—		3,737		3,737
Other commercial loans		—		81		81
Total TDRs	$	1,542	$	21,407	$	22,949

	March 31, 2020
	Accruing		Nonaccrual		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	14	$	14
Other secured by 1-4 family residential properties		—		3,672		3,672
Secured by nonfarm, nonresidential properties		—		2,899		2,899
Commercial and industrial loans		2,640		17,103		19,743
Consumer loans		17		23		40
Other commercial loans		—		125		125
Total TDRs	$	2,657	$	23,836	$	26,493

Schedule of Amortized Cost Basis of Collateral-Dependent Loans

The following table presents the amortized cost basis of collateral-dependent loans by class of loans and collateral type as of March 31, 2021 ($ in thousands):

	March 31, 2021
	Real Estate		Equipment and Machinery		Inventory and Receivables		Vehicles		Miscellaneous		Total
Loans secured by real estate:
Construction, land development and    other land	$	5,885	$	—	$	—	$	—	$	—	$	5,885
Other secured by 1-4 family    residential properties		216		—		—		—		—		216
Secured by nonfarm, nonresidential    properties		12,617		—		—		—		—		12,617
Other real estate secured		58		—		—		—		—		58
Other loans secured by real estate:
Other construction		—		—		—		—		—		—
Secured by 1-4 family residential    properties		1,413		—		—		—		—		1,413
Commercial and industrial loans		44		115		2,322		101		8,401		10,983
Consumer loans		—		—		—		—		—		—
State and other political subdivision loans		3,914		—		—		—		—		3,914
Other commercial loans		601		—		1,958		—		3,051		5,610
Total	$	24,748	$	115	$	4,280	$	101	$	11,452	$	40,696

Carrying Amount of Loans by Credit Quality Indicator

The tables below present the amortized cost basis of loans by credit quality indicator and class of loans based on analyses performed at March 31, 2021 and December 31, 2020 ($ in thousands):

	Term Loans by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans		Total
As of March 31, 2021	Commercial LHFI
Loans secured by real estate:
Construction, land development    and other land:
Pass - RR 1 through RR 6	$	100,508	$	238,877	$	49,940	$	22,200	$	2,204	$	5,961	$	25,907	$	445,597
Special Mention - RR 7		—		—		—		—		—		—		—		—
Substandard - RR 8		5,151		168		4,502		1,146		12		112		—		11,091
Doubtful - RR 9		—		—		—		—		—		42		—		42
Total		105,659		239,045		54,442		23,346		2,216		6,115		25,907		456,730
Other secured by 1-4 family residential    properties:
Pass - RR 1 through RR 6	$	10,814	$	32,767	$	17,563	$	13,996	$	8,222	$	11,582	$	5,982	$	100,926
Special Mention - RR 7		—		248		—		49		—		—		—		297
Substandard - RR 8		130		933		8		647		328		691		—		2,737
Doubtful - RR 9		—		27		—		—		—		—		—		27
Total		10,944		33,975		17,571		14,692		8,550		12,273		5,982		103,987
Secured by nonfarm, nonresidential    properties:
Pass - RR 1 through RR 6	$	136,053	$	661,490	$	541,511	$	483,464	$	266,124	$	452,175	$	89,019	$	2,629,836
Special Mention - RR 7		10,557		12,149		1,326		1,697		4,678		24,842		—		55,249
Substandard - RR 8		11,691		6,688		24,079		4,503		3,145		62,512		764		113,382
Doubtful - RR 9		50		—		156		—		—		512		—		718
Total		158,351		680,327		567,072		489,664		273,947		540,041		89,783		2,799,185
Other real estate secured:
Pass - RR 1 through RR 6	$	94,481	$	92,208	$	436,162	$	365,387	$	33,631	$	80,300	$	12,529	$	1,114,698
Special Mention - RR 7		—		—		—		—		—		825		—		825
Substandard - RR 8		8,758		10,105		14		18		—		180		—		19,075
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		103,239		102,313		436,176		365,405		33,631		81,305		12,529		1,134,598

	Term Loans by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans		Total
As of March 31, 2021	Commercial LHFI
Other loans secured by real estate:
Other construction:
Pass - RR 1 through RR 6	$	91,578	$	305,897	$	360,277	$	28,411	$	—	$	2,851	$	9,176	$	798,190
Special Mention - RR 7		—		—		—		—		—		—		—		—
Substandard - RR 8		—		996		—		—		—		—		—		996
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		91,578		306,893		360,277		28,411		—		2,851		9,176		799,186
Commercial and industrial loans:
Pass - RR 1 through RR 6	$	185,654	$	322,347	$	146,801	$	64,024	$	64,540	$	93,115	$	376,945	$	1,253,426
Special Mention - RR 7		—		789		—		—		—		—		—		789
Substandard - RR 8		4,406		11,622		1,891		9,055		3,632		3,423		34,662		68,691
Doubtful - RR 9		2		146		70		118		—		35		—		371
Total		190,062		334,904		148,762		73,197		68,172		96,573		411,607		1,323,277
State and other political subdivision    loans:
Pass - RR 1 through RR 6	$	66,925	$	215,718	$	84,495	$	39,564	$	112,486	$	507,878	$	1,338	$	1,028,404
Special Mention - RR 7		—		—		—		—		—		4,018		—		4,018
Substandard - RR 8		—		—		—		—		200		4,072		—		4,272
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		66,925		215,718		84,495		39,564		112,686		515,968		1,338		1,036,694
Other commercial loans:
Pass - RR 1 through RR 6	$	29,029	$	80,676	$	70,698	$	18,808	$	10,339	$	56,084	$	151,115	$	416,749
Special Mention - RR 7		—		—		—		—		—		—		—		—
Substandard - RR 8		—		7,417		2,094		663		—		504		21,856		32,534
Doubtful - RR 9		1		—		—		—		—		23		—		24
Total		29,030		88,093		72,792		19,471		10,339		56,611		172,971		449,307
Total commercial LHFI	$	755,788	$	2,001,268	$	1,741,587	$	1,053,750	$	509,541	$	1,311,737	$	729,293	$	8,102,964

	Term Loans by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans		Total
As of March 31, 2021	Consumer LHFI
Loans secured by real estate:
Construction, land development and    other land:
Current	$	7,514	$	47,747	$	17,777	$	6,904	$	1,924	$	3,677	$	—	$	85,543
Past due 30-89 days		—		351		—		19		76		86		—		532
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		97		—		97
Total		7,514		48,098		17,777		6,923		2,000		3,860		—		86,172
Other secured by 1-4 family residential    properties:
Current	$	5,564	$	19,368	$	8,340	$	10,773	$	4,054	$	11,890	$	340,945	$	400,934
Past due 30-89 days		—		54		477		1		—		491		544		1,567
Past due 90 days or more		—		—		—		—		—		—		7		7
Nonaccrual		2		67		46		12		421		364		2,325		3,237
Total		5,566		19,489		8,863		10,786		4,475		12,745		343,821		405,745
Secured by nonfarm, nonresidential    properties:
Current	$	—	$	—	$	—	$	—	$	3	$	7	$	—	$	10
Past due 30-89 days		—		—		—		—		—		—		—		—
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		—		—		—
Total		—		—		—		—		3		7		—		10
Other real estate secured:
Current	$	—	$	104	$	—	$	9	$	35	$	259	$	—	$	407
Past due 30-89 days		—		—		—		—		—		—		—		—
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		—		—		—
Total		—		104		—		9		35		259		—		407

	Term Loans by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans		Total
As of March 31, 2021	Consumer LHFI
Other loans secured by real estate:
Secured by 1-4 family residential    properties
Current	$	131,515	$	278,826	$	186,350	$	153,008	$	82,211	$	380,460	$	—	$	1,212,370
Past due 30-89 days		—		170		42		118		163		2,785		—		3,278
Past due 90 days or more		—		354		142		380		338		1,153		—		2,367
Nonaccrual		—		645		1,746		2,577		1,062		9,005		—		15,035
Total		131,515		279,995		188,280		156,083		83,774		393,403		—		1,233,050
Consumer loans:
Current	$	20,081	$	49,428	$	19,813	$	10,330	$	3,010	$	1,219	$	50,283	$	154,164
Past due 30-89 days		168		302		93		43		6		10		281		903
Past due 90 days or more		22		—		8		1		—		—		188		219
Nonaccrual		—		19		4		24		12		2		9		70
Total		20,271		49,749		19,918		10,398		3,028		1,231		50,761		155,356
Total consumer LHFI	$	164,866	$	397,435	$	234,838	$	184,199	$	93,315	$	411,505	$	394,582	$	1,880,740
Total LHFI	$	920,654	$	2,398,703	$	1,976,425	$	1,237,949	$	602,856	$	1,723,242	$	1,123,875	$	9,983,704

	Term Loans by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans		Total
As of December 31, 2020	Commercial LHFI
Loans secured by real estate:
Construction, land development    and other land:
Pass - RR 1 through RR 6	$	287,218	$	62,078	$	26,401	$	4,487	$	3,274	$	3,564	$	28,548	$	415,570
Special Mention - RR 7		—		—		—		—		—		—		—		—
Substandard - RR 8		5,419		4,363		1,226		12		494		22		101		11,637
Doubtful - RR 9		—		—		—		—		—		42		—		42
Total		292,637		66,441		27,627		4,499		3,768		3,628		28,649		427,249
Other secured by 1-4 family residential    properties:
Pass - RR 1 through RR 6	$	35,139	$	19,596	$	15,399	$	9,605	$	10,273	$	4,786	$	8,486	$	103,284
Special Mention - RR 7		255		—		50		—		—		—		—		305
Substandard - RR 8		1,155		8		914		341		302		337		3,950		7,007
Doubtful - RR 9		29		—		—		—		—		—		—		29
Total		36,578		19,604		16,363		9,946		10,575		5,123		12,436		110,625
Secured by nonfarm, nonresidential    properties:
Pass - RR 1 through RR 6	$	697,439	$	496,476	$	442,264	$	293,072	$	254,747	$	251,219	$	96,098	$	2,531,315
Special Mention - RR 7		13,452		6,139		2,956		4,466		4,957		20,545		—		52,515
Substandard - RR 8		19,119		20,572		4,516		12,956		38,956		25,438		2,779		124,336
Doubtful - RR 9		52		163		—		—		217		306		—		738
Total		730,062		523,350		449,736		310,494		298,877		297,508		98,877		2,708,904
Other real estate secured:
Pass - RR 1 through RR 6	$	146,803	$	376,765	$	347,472	$	48,626	$	89,824	$	23,680	$	12,116	$	1,045,286
Special Mention - RR 7		—		—		—		—		—		841		—		841
Substandard - RR 8		18,649		14		18		—		556		122		—		19,359
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		165,452		376,779		347,490		48,626		90,380		24,643		12,116		1,065,486

	Term Loans by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans		Total
As of December 31, 2020	Commercial LHFI
Other loans secured by real estate:
Other construction
Pass - RR 1 through RR 6	$	262,544	$	425,936	$	81,476	$	14,074	$	2,464	$	—	$	7,735	$	794,229
Special Mention - RR 7		—		—		—		—		—		—		—		—
Substandard - RR 8		754		—		—		—		—		—		—		754
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		263,298		425,936		81,476		14,074		2,464		—		7,735		794,983
Commercial and industrial loans:
Pass - RR 1 through RR 6	$	444,304	$	165,163	$	77,611	$	77,985	$	59,131	$	43,214	$	372,486	$	1,239,894
Special Mention - RR 7		677		45		—		—		—		—		240		962
Substandard - RR 8		12,090		1,814		9,737		3,735		2,160		5,024		33,380		67,940
Doubtful - RR 9		151		95		—		—		32		4		—		282
Total		457,222		167,117		87,348		81,720		61,323		48,242		406,106		1,309,078
State and other political subdivision loans:
Pass - RR 1 through RR 6	$	250,363	$	79,595	$	41,334	$	113,817	$	132,634	$	372,831	$	1,446	$	992,020
Special Mention - RR 7		—		—		—		—		—		4,018		—		4,018
Substandard - RR 8		—		—		—		247		—		4,491		—		4,738
Doubtful - RR 9		—		—		—		—		—		—		—		—
Total		250,363		79,595		41,334		114,064		132,634		381,340		1,446		1,000,776
Other commercial loans:
Pass - RR 1 through RR 6	$	101,230	$	70,990	$	20,769	$	9,723	$	33,481	$	30,715	$	225,533	$	492,441
Special Mention - RR 7		7,500		—		—		—		—		—		11,333		18,833
Substandard - RR 8		381		2,099		683		6		707		—		9,948		13,824
Doubtful - RR 9		2		—		—		—		—		23		—		25
Total		109,113		73,089		21,452		9,729		34,188		30,738		246,814		525,123
Total commercial LHFI	$	2,304,725	$	1,731,911	$	1,072,826	$	593,152	$	634,209	$	791,222	$	814,179	$	7,942,224

	Term Loans by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans		Total
As of December 31, 2020	Consumer LHFI
Loans secured by real estate:
Construction, land development and    other land:
Current	$	47,336	$	24,174	$	8,496	$	2,036	$	1,447	$	2,868	$	—	$	86,357
Past due 30-89 days		—		318		20		—		1		12		—		351
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		99		—		99
Total		47,336		24,492		8,516		2,036		1,448		2,979		—		86,807
Other secured by 1-4 family residential    properties:
Current	$	20,864	$	10,253	$	12,037	$	4,177	$	2,082	$	11,124	$	348,830	$	409,367
Past due 30-89 days		93		12		—		13		—		133		1,058		1,309
Past due 90 days or more		—		—		—		—		—		30		22		52
Nonaccrual		6		44		121		428		—		382		2,398		3,379
Total		20,963		10,309		12,158		4,618		2,082		11,669		352,308		414,107
Secured by nonfarm, nonresidential    properties:
Current	$	109	$	—	$	—	$	4	$	—	$	9	$	—	$	122
Past due 30-89 days		—		—		—		—		—		—		—		—
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		—		—		—
Total		109		—		—		4		—		9		—		122
Other real estate secured:
Current	$	107	$	—	$	38	$	37	$	96	$	200	$	—	$	478
Past due 30-89 days		—		—		—		—		—		—		—		—
Past due 90 days or more		—		—		—		—		—		—		—		—
Nonaccrual		—		—		—		—		—		—		—		—
Total		107		—		38		37		96		200		—		478

	Term Loans by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans		Total
As of December 31, 2020	Consumer LHFI
Other loans secured by real estate:
Secured by 1-4 family residential    properties
Current	$	289,521	$	214,056	$	173,324	$	92,564	$	109,031	$	321,250	$	—	$	1,199,746
Past due 30-89 days		499		93		753		366		1,080		799		—		3,590
Past due 90 days or more		159		214		208		127		—		549		—		1,257
Nonaccrual		283		711		2,024		682		239		7,868		—		11,807
Total		290,462		215,074		176,309		93,739		110,350		330,466		—		1,216,400
Consumer loans:
Current	$	65,370	$	25,303	$	13,140	$	3,893	$	1,257	$	345	$	53,669	$	162,977
Past due 30-89 days		524		158		67		19		7		3		305		1,083
Past due 90 days or more		77		—		4		—		—		—		159		240
Nonaccrual		12		4		55		13		2		—		—		86
Total		65,983		25,465		13,266		3,925		1,266		348		54,133		164,386
Total consumer LHFI	$	424,960	$	275,340	$	210,287	$	104,359	$	115,242	$	345,671	$	406,441	$	1,882,300
Total LHFI	$	2,729,685	$	2,007,251	$	1,283,113	$	697,511	$	749,451	$	1,136,893	$	1,220,620	$	9,824,524

Summary of Trustmark's Portfolio Segments, Loan Classes, Loan Pools and the ACL Methodology and Loss Drivers

The following table provides a description of each of Trustmark’s portfolio segments, loan classes, loan pools and the ACL methodology and loss drivers:

Portfolio Segment	Loan Class	Loan Pool	Methodology	Loss Drivers
Loans secured by real estate	Construction, land    development and other land	1-4 family residential    construction	DCF	Prime Rate, National GDP
		Lots and development	DCF	Prime Rate, Southern Unemployment
		Unimproved land	DCF	Prime Rate, Southern Unemployment
		All other consumer	DCF	Southern Unemployment
	Other secured by 1-4    family residential    properties	Consumer 1-4 family - 1st liens	DCF	Prime Rate, Southern Unemployment
		All other consumer	DCF	Southern Unemployment
		Nonresidential owner-occupied	DCF	Southern Unemployment, National GDP
	Secured by nonfarm,    nonresidential properties	Nonowner-occupied -    hotel/motel	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonowner-occupied - office	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonowner-occupied- Retail	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonowner-occupied - senior    living/nursing homes	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonowner-occupied -    all other	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonresidential owner-occupied	DCF	Southern Unemployment, National GDP
	Other real estate secured	Nonresidential nonowner    -occupied - apartments	DCF	Southern Vacancy Rate, Southern Unemployment
		Nonresidential owner-occupied	DCF	Southern Unemployment, National GDP
		Nonowner-occupied -    all other	DCF	Southern Vacancy Rate, Southern Unemployment
Other loans secured by    real estate	Other construction	Other construction	WARM	Prime Rate, National Unemployment
	Secured by 1-4 family    residential properties	Trustmark mortgage	WARM	Southern Unemployment
Commercial and    industrial loans	Commercial and    industrial loans	Commercial and industrial -    non-working capital	DCF	Trustmark historical data
		Commercial and industrial -    working capital	DCF	Trustmark historical data
		Credit cards	WARM	Trustmark call report data
Consumer loans	Consumer loans	Credit cards	WARM	Trustmark call report data
		Overdrafts	Loss Rate	Trustmark historical data
		All other consumer	DCF	Southern Unemployment
State and other political    subdivision loans	State and other political    subdivision loans	Obligations of state and    political subdivisions	DCF	Moody's Bond Default Study
Other commercial loans	Other commercial loans	Other loans	DCF	Prime Rate, Southern Unemployment
		Commercial and industrial -    non-working capital	DCF	Trustmark historical data
		Commercial and industrial -    working capital	DCF	Trustmark historical data

Change in Allowance for Loan Losses

The following tables disaggregate the ACL and the amortized cost basis of the loans by the measurement methodology used at March 31, 2021 and December 31, 2020 ($ in thousands):

	March 31, 2021
	ACL						LHFI
	Individually Evaluated for Credit Loss		Collectively Evaluated for Credit Loss		Total ACL		Individually Evaluated for Credit Loss		Collectively Evaluated for Credit Loss		Total LHFI
Loans secured by real estate:
Construction, land development and other land	$	—	$	5,058	$	5,058	$	5,885		537,017	$	542,902
Other secured by 1-4 family residential properties		—		8,667		8,667		216		509,516		509,732
Secured by nonfarm, nonresidential properties		—		46,438		46,438		12,617		2,786,578		2,799,195
Other real estate secured		—		5,770		5,770		58		1,134,947		1,135,005
Other loans secured by real estate:
Other construction		—		5,124		5,124		—		799,186		799,186
Secured by 1-4 family residential properties		—		3,753		3,753		1,413		1,231,637		1,233,050
Commercial and industrial loans		5,721		14,445		20,166		10,983		1,312,294		1,323,277
Consumer loans		—		4,750		4,750		—		155,356		155,356
State and other political subdivision loans		1,644		1,371		3,015		3,914		1,032,780		1,036,694
Other commercial loans		2,094		4,356		6,450		5,610		443,697		449,307
Total	$	9,459	$	99,732	$	109,191	$	40,696	$	9,943,008	$	9,983,704

	December 31, 2020
	ACL						LHFI
	Individually Evaluated		Collectively Evaluated		Total		Individually Evaluated		Collectively Evaluated		Total
Loans secured by real estate:
Construction, land development and other land	$	—	$	6,854	$	6,854	$	5,756	$	508,300	$	514,056
Other secured by 1-4 family residential properties		—		9,928		9,928		454		524,278		524,732
Secured by nonfarm, nonresidential properties		—		48,523		48,523		12,037		2,696,989		2,709,026
Other real estate secured		—		7,382		7,382		60		1,065,904		1,065,964
Other loans secured by real estate:
Other construction		—		8,158		8,158		—		794,983		794,983
Secured by 1-4 family residential properties		—		5,143		5,143		1,441		1,214,959		1,216,400
Commercial and industrial loans		579		14,272		14,851		14,076		1,295,002		1,309,078
Consumer loans		—		5,838		5,838		—		164,386		164,386
State and other political subdivision loans		1,700		1,490		3,190		3,970		996,806		1,000,776
Other commercial loans		2,100		5,339		7,439		5,615		519,508		525,123
Total	$	4,379	$	112,927	$	117,306	$	43,409	$	9,781,115	$	9,824,524

Changes in the ACL were as follows for the periods presented ($ in thousands):

	Three Months Ended March 31,
	2021			2020
Balance at beginning of period	$	117,306		$	84,277
FASB ASU 2016-13 adoption adjustments:
LHFI		—			(3,039	)
Allowance for loan losses, acquired loans transfer		—			815
Acquired loans ACL adjustment		—			1,007
Loans charged-off		(1,245	)		(5,545	)
Recoveries		3,631			2,468
Net (charge-offs) recoveries		2,386			(3,077	)
PCL		(10,501	)		20,581
Balance at end of period	$	109,191		$	100,564

The following tables detail changes in the ACL by loan class for the periods presented ($ in thousands):

	Three Months Ended March 31, 2021
	Balance at Beginning of Period		Charge-offs			Recoveries		PCL			Balance at End of Period
Loans secured by real estate:
Construction, land development and other land	$	6,854	$	—		$	766	$	(2,562	)	$	5,058
Other secured by 1-4 family residential properties		9,928		(26	)		71		(1,306	)		8,667
Secured by nonfarm, nonresidential properties		48,523		—			30		(2,115	)		46,438
Other real estate secured		7,382		—			6		(1,618	)		5,770
Other loans secured by real estate:
Other construction		8,158		—			1		(3,035	)		5,124
Secured by 1-4 family residential properties		5,143		—			100		(1,490	)		3,753
Commercial and industrial loans		14,851		(23	)		1,287		4,051			20,166
Consumer loans		5,838		(442	)		362		(1,008	)		4,750
State and other political subdivision loans		3,190		—			—		(175	)		3,015
Other commercial loans		7,439		(754	)		1,008		(1,243	)		6,450
Total	$	117,306	$	(1,245	)	$	3,631	$	(10,501	)	$	109,191

The decreases in the PCL for the three months ended March 31, 2021 were primarily due to improvements in the macroeconomic forecasting variables used in the ACL modeling, such as National and Southern Unemployment, National GDP, Prime Rate and South Vacancy Rate.

The PCL for the commercial and industrial loan portfolio increased $4.1 million during the three months ended March 31, 2021 primarily due to loans being specifically reserved.

	Three Months Ended March 31, 2020
	Balance at Beginning of Period		FASB ASU 2016-13 Adoption Adjustment			Charge-offs			Recoveries		PCL			Balance at End of Period
Loans secured by real estate:
Construction, land development and other land	$	6,371	$	(188	)	$	—		$	94	$	2,802		$	9,079
Other secured by 1-4 family residential properties		5,888		4,188			(64	)		63		1,636			11,711
Secured by nonfarm, nonresidential properties		26,158		(8,179	)		(2,448	)		61		12,535			28,127
Other real estate secured		4,024		(765	)		(8	)		6		2,016			5,273
Other loans secured by real estate:
Other construction		1,889		3,202			—			19		2,601			7,711
Secured by 1-4 family residential properties		3,044		2,891			(19	)		93		2,033			8,042
Commercial and industrial loans		25,992		(8,964	)		(982	)		542		(2,024	)		14,564
Consumer loans		3,379		2,059			(690	)		473		1,375			6,596
State and other political subdivision loans		2,229		2,455			—			—		(1,243	)		3,441
Other commercial loans		5,303		2,084			(1,334	)		1,117		(1,150	)		6,020
Total	$	84,277	$	(1,217	)	$	(5,545	)	$	2,468	$	20,581		$	100,564