Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Interest Income
Interest and fees on LHFS & LHFI	$ 440,156	$ 395,969		$ 344,625
Interest and fees on acquired loans	8,373	17,115		24,478
Interest on securities:
Taxable	54,649	66,082		76,192
Tax exempt	1,711	2,236		3,001
Interest on federal funds sold and securities purchased under reverse repurchase agreements	240	14		33
Other interest income	5,363	4,196		1,466
Total Interest Income	510,492	485,612		449,795
Interest Expense
Interest on deposits	79,171	53,936		22,717
Interest on federal funds purchased and securities sold under repurchase agreements	1,420	4,788		4,152
Other interest expense	3,312	7,468		15,376
Total Interest Expense	83,903	66,192		42,245
Net Interest Income	426,589	419,420		407,550
Provision for loan losses, LHFI	10,797	17,993		15,094
Provision for loan losses, acquired loans	42	(1,005)		(7,395)
Net Interest Income After Provision for Loan Losses	415,750	402,432		399,851
Noninterest Income
Service charges on deposit accounts	42,603	43,702	[1]	44,003	[1],[2]
Bank card and other fees	31,736	28,905	[1]	28,286	[1],[2]
Mortgage banking, net	29,822	34,674	[1]	29,902	[1],[2]
Insurance commissions	42,396	40,481	[1]	38,168	[1],[2]
Wealth management	30,679	30,338	[1]	30,340	[1],[2]
Other, net	9,809	6,736	[1]	13,949	[1],[2]
Securities gains (losses), net	0	0		15	[1],[2]
Total Noninterest Income	187,045	184,836	[1]	184,663	[1],[2]
Noninterest Expense
Salaries and employee benefits	247,717	238,033		229,265
Defined benefit plan termination				17,644
Services and fees	73,315	66,382		60,893
Net occupancy - premises	26,149	26,703		25,767
Equipment expense	23,733	24,830		24,453
Other real estate expense	3,906	2,002		3,672
FDIC assessment expense	6,444	9,429		11,010
Other expense	47,738	48,036		57,465
Total Noninterest Expense	429,002	415,415		430,169
Income Before Income Taxes	173,793	171,853		154,345
Income taxes	23,333	22,269		48,715
Net Income	$ 150,460	$ 149,584		$ 105,630
Earnings Per Share
Basic	$ 2.33	$ 2.22		$ 1.56
Diluted	$ 2.32	$ 2.21		$ 1.56

[1] During the first quarter of 2019, Trustmark revised the composition of its operating segments by moving the Private Banking Group from the General Banking Segment to the Wealth Management Segment as a result of a change in supervision of this group for segment reporting purposes.  The prior period amounts presented include reclassifications to conform to the current period presentation.

[2] Trustmark elected the modified retrospective approach of adoption; therefore, prior period balances are presented under legacy GAAP and may not be comparable to current year presentation.