Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Dec. 31, 2020

USD ($)

Pay vs Performance Disclosure [Table]

Pay vs Performance [Table Text Block]

Pay vs. Performance

									Value of Initial Fixed $100 Investment Based On:						Company Selected
Year	Summary Compensation Table (SCT) Total for CEO$(1)		Compensation Actually Paid to CEO(2)(3)		SCT Total for Non-PEO NEO($)		Compensation Actually Paid to Non-PEO NEO($)(2)		FBMS TSR		Peer Group TSR(3)		Net Income($)		Measure Pre-Tax Pre- Provision Income(4)
(a)		(b)		(c)		(d)		(e)		(f)		(g)		(h)		(i)
2022		3,079,429	$	2,508,196		1,226,198	$	994,977		100.35		115.38		62,919,000		88,203,000
2021		1,677,507	$	1,957,287		770,988	$	901,304		118.37		137.82		64,167,000		80,257,000
2020		1,586,035	$	1,380,158		538,543	$	454,636		93.25		96.44		54,505,000		82,109,000
Year 4		(required in 2024)
Year 5		(required in 2025)

1) The principal executive officer (the”PEO”) for each of 2022, 2021, and 2020 is Mr. Cole. We only have one non-PEO named executive Officer (the “non-PEO NEO”) for each applicable year, Ms. Lowery.

2) Reconciliation of adjustments made to Summary Compensation Table total compensation to calculate CAP for the PEO and CAP for the non-PEO NEO:

	CEO									Non-PEO NEO
	2022			2021			2020			2022			2021			2020
SCT		3,079,429			1,677,507			1,586,035			1,226,198			770,988			538,543
Stock  awards reported in SCT		(1,487,425	)		(240,435	)		(284,750	)		(510,705	)		(122,067	)		(108,728	)
Change in pension value reported in SCT		(605,789	)		(551,602	)		(500,755	)		(269,882	)		(246,613	)		(45,844	)
“Service Cost” attributable to current years’ service		492,214			492,214			492,214			251,079			251,079			35,745
Year-end fair value of unvested restricted stock awards granted in current year		1,292,724			251,030			316,242			400,125			127,446			106,351
Dividends paid on unvested shares and stock options (SOs)		24,725			13,191			8,461			7,946			4,029			3,840
Year over year change in fair value of outstanding and unvested restricted stock		(287,682	)		315,382			(237,290	)		(109,784	)		116,442			(75,271	)
CAP		2,508,196			1,957,287			1,380,158			994,977			901,304			454,636

3) The peer group that we used for purposes of this disclosure is the NASDAQ OMX Bank Index, the same index used for our performance graph disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022.

4) Calculated as pre-tax, pre-provision income adjusted for one-time, non-operating items.

Company Selected Measure Name

Pre-Tax Pre- Provision Income

Named Executive Officers, Footnote [Text Block]

1) The principal executive officer (the”PEO”) for each of 2022, 2021, and 2020 is Mr. Cole. We only have one non-PEO named executive Officer (the “non-PEO NEO”) for each applicable year, Ms. Lowery.

Peer Group Issuers, Footnote [Text Block]

3) The peer group that we used for purposes of this disclosure is the NASDAQ OMX Bank Index, the same index used for our performance graph disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022.

PEO Total Compensation Amount

$ 3,079,429

$ 1,677,507

$ 1,586,035

PEO Actually Paid Compensation Amount

$ 2,508,196

1,957,287

1,380,158

Adjustment To PEO Compensation, Footnote [Text Block]

2) Reconciliation of adjustments made to Summary Compensation Table total compensation to calculate CAP for the PEO and CAP for the non-PEO NEO:

	CEO									Non-PEO NEO
	2022			2021			2020			2022			2021			2020
SCT		3,079,429			1,677,507			1,586,035			1,226,198			770,988			538,543
Stock  awards reported in SCT		(1,487,425	)		(240,435	)		(284,750	)		(510,705	)		(122,067	)		(108,728	)
Change in pension value reported in SCT		(605,789	)		(551,602	)		(500,755	)		(269,882	)		(246,613	)		(45,844	)
“Service Cost” attributable to current years’ service		492,214			492,214			492,214			251,079			251,079			35,745
Year-end fair value of unvested restricted stock awards granted in current year		1,292,724			251,030			316,242			400,125			127,446			106,351
Dividends paid on unvested shares and stock options (SOs)		24,725			13,191			8,461			7,946			4,029			3,840
Year over year change in fair value of outstanding and unvested restricted stock		(287,682	)		315,382			(237,290	)		(109,784	)		116,442			(75,271	)
CAP		2,508,196			1,957,287			1,380,158			994,977			901,304			454,636

Non-PEO NEO Average Total Compensation Amount

$ 1,226,198

770,988

538,543

Non-PEO NEO Average Compensation Actually Paid Amount

$ 994,977

901,304

454,636

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

2) Reconciliation of adjustments made to Summary Compensation Table total compensation to calculate CAP for the PEO and CAP for the non-PEO NEO:

	CEO									Non-PEO NEO
	2022			2021			2020			2022			2021			2020
SCT		3,079,429			1,677,507			1,586,035			1,226,198			770,988			538,543
Stock  awards reported in SCT		(1,487,425	)		(240,435	)		(284,750	)		(510,705	)		(122,067	)		(108,728	)
Change in pension value reported in SCT		(605,789	)		(551,602	)		(500,755	)		(269,882	)		(246,613	)		(45,844	)
“Service Cost” attributable to current years’ service		492,214			492,214			492,214			251,079			251,079			35,745
Year-end fair value of unvested restricted stock awards granted in current year		1,292,724			251,030			316,242			400,125			127,446			106,351
Dividends paid on unvested shares and stock options (SOs)		24,725			13,191			8,461			7,946			4,029			3,840
Year over year change in fair value of outstanding and unvested restricted stock		(287,682	)		315,382			(237,290	)		(109,784	)		116,442			(75,271	)
CAP		2,508,196			1,957,287			1,380,158			994,977			901,304			454,636

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

CEO and Non-PEO NEO compensation actually paid as compared to company TSR:  As the reconciliation of adjustments made to SCT to arrive at CAP show, the adjusted equity values are positive for 2021 and negative for 2022.  This reflects the fact that year end stock price from year-end 2020 to year-end 2021 increased and year-end stock price from 2021 to year-end 2022 decreased, which correlates with cumulative TSR increases from 2020 to 2021 and decreases from 2021 to 2022.

Total Shareholder Return Vs Peer Group [Text Block]

Company TSR to peer group TSR:  As shown in the chart below, FBMS' total shareholder return is slightly below the OMX Banks-Index peer group for 2020, 2021, and 2022.  This is due primarily to the Banks asset growth over the past three years.

 

Tabular List [Table Text Block]

Required Tabular disclosure of Most Important Measures to Determine 2022 CAP

Other Company Selected Performance Measures

Pre-Tax Income Loan Growth

Deposit Growth

Total Asset Growth

Credit Quality

Total Shareholder Return Amount

$ 100.35

118.37

93.25

Peer Group Total Shareholder Return Amount

115.38

137.82

96.44

Net Income (Loss)

$ 62,919,000

$ 64,167,000

$ 54,505,000

Company Selected Measure Amount

88,203,000

80,257,000

82,109,000

PEO Name

Mr. Cole

Measure [Axis]: 1

Pay vs Performance Disclosure [Table]

Measure Name

Pre-Tax Income Loan Growth

Non-GAAP Measure Description [Text Block]

4) Calculated as pre-tax, pre-provision income adjusted for one-time, non-operating items.

Measure [Axis]: 2

Pay vs Performance Disclosure [Table]

Compensation Actually Paid vs. Other Measure [Text Block]

CEO and Non-PEO NEO compensation actually paid to company pre-tax income,:  The total compensation actually paid to each executive correlates to the Bank's achievement of profitability and strategic goals through the annual and long-term incentive plans that were approved by the compensation committee for these executive officers.  The decrease in compensation actually paid from the amounts disclosed in the summary compensation table is due to decreases in stock price in 2022 and 2020, which is attributable to overall market changes rather than executive officer performance.  

Measure Name

Deposit Growth

Measure [Axis]: 3

Pay vs Performance Disclosure [Table]

Measure Name

Total Asset Growth

Measure [Axis]: 4

Pay vs Performance Disclosure [Table]

Measure Name

Credit Quality

Mr Cole [Member] | Stock awards reported in SCT

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (1,487,425)

$ (240,435)

$ (284,750)

Mr Cole [Member] | Change in pension value reported in SCT

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(605,789)

(551,602)

(500,755)

Mr Cole [Member] | “Service Cost” attributable to current years’ service

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

492,214

492,214

492,214

Mr Cole [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

1,292,724

251,030

316,242

Mr Cole [Member] | Dividends paid on unvested shares and stock options (SOs)

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

24,725

13,191

8,461

Mr Cole [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(287,682)

315,382

(237,290)

Non-PEO NEO [Member] | Stock awards reported in SCT

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(510,705)

(122,067)

(108,728)

Non-PEO NEO [Member] | Change in pension value reported in SCT

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(269,882)

(246,613)

(45,844)

Non-PEO NEO [Member] | “Service Cost” attributable to current years’ service

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

251,079

251,079

35,745

Non-PEO NEO [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

400,125

127,446

106,351

Non-PEO NEO [Member] | Dividends paid on unvested shares and stock options (SOs)

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

7,946

4,029

3,840

Non-PEO NEO [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (109,784)

$ 116,442

$ (75,271)