Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest Income
Interest and fees on LHFS & LHFI		$ 94,523	$ 113,285	$ 297,227	$ 331,820
Interest and fees on PPP loans		6,729		11,773
Interest and fees on acquired loans	[1]		2,309		6,235
Interest on securities:
Taxable		12,542	13,184	38,252	41,765
Tax exempt		238	383	848	1,329
Interest on federal funds sold and securities purchased under reverse repurchase agreements		1	23	1	239
Other interest income		331	1,044	1,310	4,467
Total Interest Income		114,364	130,228	349,411	385,855
Interest Expense
Interest on deposits		7,437	20,385	31,124	61,455
Interest on federal funds purchased and securities sold under repurchase agreements		32	547	699	916
Other interest expense		688	830	2,429	2,486
Total Interest Expense		8,157	21,762	34,252	64,857
Net Interest Income		106,207	108,466	315,159	320,998
Provision for credit losses (PCL)	[1]	1,760	3,039	40,526	7,136
Provision for loan losses, acquired loans	[1]		(140)		44
Net Interest Income After PCL		104,447	105,567	274,633	313,818
Noninterest Income
Service charges on deposit accounts		7,577	11,065	24,006	31,709
Bank card and other fees		8,843	8,349	21,915	23,544
Mortgage banking, net		36,439	8,171	97,667	21,908
Insurance commissions		11,562	11,072	34,980	33,032
Wealth management		7,679	7,691	23,787	22,916
Other, net		1,601	1,989	6,121	6,358
Total Noninterest Income		73,701	48,337	208,476	139,467
Noninterest Expense
Salaries and employee benefits		67,342	62,495	202,597	185,398
Services and fees		20,992	18,838	61,489	53,815
Net occupancy - premises		7,000	6,831	19,873	19,688
Equipment expense		5,828	5,971	17,064	17,853
Other real estate expense, net		1,203	531	2,768	2,415
Credit loss expense related to off-balance sheet credit exposures	[1]	(3,004)		10,021
Other expense		14,598	12,187	42,616	39,806
Total Noninterest Expense		113,959	106,853	356,428	318,975
Income Before Income Taxes		64,189	47,051	126,681	134,310
Income taxes		9,749	6,016	17,873	17,796
Net Income		$ 54,440	$ 41,035	$ 108,808	$ 116,514
Earnings Per Share
Basic		$ 0.86	$ 0.64	$ 1.71	$ 1.80
Diluted		$ 0.86	$ 0.64	$ 1.71	$ 1.80

[1] Effective January 1, 2020, Trustmark adopted FASB ASU 2016-13 using the modified retrospective approach.  Therefore, prior period balances are presented under legacy GAAP and may not be comparable to current period presentation.