Note 20 - Stockholder' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

	Actual				Minimum For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provision
(In thousands)	Amount		Ratio (%)		Amount		Ratio (%)		Amount		Ratio (%)
As of December 31, 2016
Total Risk-Based Capital Ratio
Simmons First National Corporation	$	912,948		15.1	$	483,681		8.0	$	N/A
Simmons Bank		830,921		13.8		481,693		8.0		602,117		10.0
Tier 1 Risk-Based Capital Ratio
Simmons First National Corporation		872,707		14.5		361,120		6.0		N/A
Simmons Bank		790,673		13.2		359,397		6.0		479,196		8.0
Common Equity Tier 1 Capital Ratio
Simmons First National Corporation		812,310		13.5		270,770		4.5		N/A
Simmons Bank		790,673		13.2		269,548		4.5		389,347		6.5
Tier 1 Leverage Ratio
Simmons First National Corporation		872,707		11.0		317,348		4.0		N/A
Simmons Bank		790,673		10.0		316,269		4.0		395,337		5.0
As of December 31, 2015
Total Risk-Based Capital Ratio
Simmons First National Corporation	$	843,227		16.7	$	403,941		8.0	$	N/A
Simmons Bank		734,170		14.6		402,285		8.0		502,856		10.0
Tier 1 Risk-Based Capital Ratio
Simmons First National Corporation		808,159		16.0		303,060		6.0		N/A
Simmons Bank		699,102		13.9		301,771		6.0		402,361		8.0
Common Equity Tier 1 Capital Ratio
Simmons First National Corporation		716,737		14.2		227,135		4.5		N/A
Simmons Bank		699,102		13.9		226,328		4.5		326,918		6.5
Tier 1 Leverage Ratio
Simmons First National Corporation		808,159		11.2		288,628		4.0		N/A
Simmons Bank		699,102		9.7		288,289		4.0		360,362		5.0