Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Schedule of Actual Capital Amounts and Ratios

The Company’s and the subsidiary bank’ actual capital amounts and ratios are presented in the following table.

	Actual			Minimum For Capital Adequacy Purposes			To Be Well Capitalized Under Prompt Corrective Action Provision
(In thousands)	Amount		Ratio (%)	Amount		Ratio (%)	Amount	Ratio (%)
December 31, 2021
Total Risk-Based Capital Ratio
Simmons First National Corporation	$	2,603,142	16.7	$	1,247,014	8.0	N/A
Simmons Bank	2,389,704		15.4	1,241,405		8.0	1,551,756	10.0
Tier 1 Risk-Based Capital Ratio
Simmons First National Corporation	2,147,158		13.8	933,547		6.0	N/A
Simmons Bank	2,317,855		15.0	927,142		6.0	1,236,189	8.0
Common Equity Tier 1 Capital Ratio
Simmons First National Corporation	2,147,158		13.8	700,160		4.5	N/A
Simmons Bank	2,317,855		15.0	695,357		4.5	1,004,404	6.5
Tier 1 Leverage Ratio
Simmons First National Corporation	2,147,158		9.1	943,806		4.0	N/A
Simmons Bank	2,317,855		9.8	946,063		4.0	1,182,579	5.0
December 31, 2020
Total Risk-Based Capital Ratio
Simmons First National Corporation	$	2,356,982	16.8	$	1,122,372	8.0	N/A
Simmons Bank	2,136,253		15.3	1,116,995		8.0	1,396,244	10.0
Tier 1 Risk-Based Capital Ratio
Simmons First National Corporation	1,884,562		13.4	843,834		6.0	N/A
Simmons Bank	2,046,711		14.6	841,114		6.0	1,121,485	8.0
Common Equity Tier 1 Capital Ratio
Simmons First National Corporation	1,883,795		13.4	632,618		4.5	N/A
Simmons Bank	2,046,711		14.6	630,836		4.5	911,207	6.5
Tier 1 Leverage Ratio
Simmons First National Corporation	1,884,562		9.1	828,379		4.0	N/A
Simmons Bank	2,046,711		9.9	826,954		4.0	1,033,692	5.0