Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 9,166,000	$ 8,941,000	$ 8,911,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,551,000	1,664,000	1,681,000
Provision for (reduction of) allowance for credit losses	(272,000)	80,000	(5,663,000)
Write-down of other real estate	0	155,000	299,000
Loss (gain) on sales of other real estate	97,000	(87,000)	(284,000)
Amortization of intangible asset	62,000	21,000	0
(Accretion) amortization of available for sale securities	(237,000)	(12,000)	412,000
(Accretion) amortization of held to maturity securities	(2,091,000)	71,000	442,000
Loss (gain) on liquidation, sales and calls of securities	0	0	45,000
Gain on sale or disposition of bank premises and equipment	(30,000)	0	0
Increase in cash surrender value of life insurance	(486,000)	(445,000)	(434,000)
Change in accrued interest receivable	(246,000)	(433,000)	(741,000)
Change in deferred tax expense (benefit)	756,000	(2,446,000)	0
Change in other assets	343,000	215,000	344,000
Change in employee and director benefit plan liabilities and other liabilities	438,000	184,000	(428,000)
Net cash provided by operating activities	9,051,000	7,908,000	4,584,000
Cash flows from investing activities:
Proceeds from maturities, liquidation, sales and calls of available for sale securities	54,123,000	89,879,000	54,627,000
Purchases of available for sale securities	(35,153,000)	(108,832,000)	(259,231,000)
Proceeds from maturities of held to maturity securities	209,307,000	23,751,000	4,937,000
Purchases of held to maturity securities	(162,970,000)	(108,831,000)	(39,899,000)
Purchase of Federal Home Loan Bank Stock	(159,000)	(22,000)	(4,000)
Proceeds from sales of other real estate	1,114,000	1,564,000	1,583,000
Loans, net change	(1,272,000)	1,231,000	43,793,000
Proceeds from sale of bank premises and equipment	46,000	0	0
Investment in cash surrender value of life insurance	(121,000)	(173,000)	(107,000)
Net cash provided by (used in) investing activities	62,378,000	(104,227,000)	(196,245,000)
Cash flows from financing activities:
Demand and savings deposits, net change	(86,067,000)	122,778,000	132,450,000
Time deposits, net change	(11,223,000)	(41,836,000)	21,890,000
Cash dividends paid	(2,473,000)	(889,000)	(769,000)
Stock repurchase	(208,000)	0	(3,381,000)
Borrowings from Federal Home Loan Bank	769,350,000	567,750,000	79,523,000
Repayments to Federal Home Loan Bank	(750,850,000)	(568,639,000)	(79,603,000)
Net cash (used in) provided by financing activities	(81,471,000)	79,164,000	150,110,000
Net (decrease) increase in cash and cash equivalents	(10,042,000)	(17,155,000)	(41,551,000)
Cash and cash equivalents, beginning of year	32,836,000	49,991,000	91,542,000
Cash and cash equivalents, end of year	22,794,000	32,836,000	49,991,000
Supplemental disclosures of noncash investing activities
Loans transferred to ORE	952,000	0	14,000
Trustmark Trust Department Book of Business [Member]
Cash flows from investing activities:
Payments to Acquire Property, Plant, and Equipment	0	(621,000)	0
Bank Premises and Equipment [Member]
Cash flows from investing activities:
Payments to Acquire Property, Plant, and Equipment	$ (2,537,000)	$ (2,173,000)	$ (1,944,000)