Stock and Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Plan Activity

The following table summarizes Trustmark’s performance award activity for the periods presented:

	Years Ended December 31,
	2019					2018					2017
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
				Grant-Date					Grant-Date					Grant-Date
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Nonvested shares, beginning of year		177,695		$	27.10		213,516		$	25.37		237,136		$	26.27
Granted		50,862			33.44		51,174			31.88		58,406			33.31
Released from restriction		(61,347	)		20.18		(55,351	)		25.32		(67,279	)		34.78
Forfeited		(17,296	)		20.18		(31,644	)		26.26		(14,747	)		28.42
Nonvested shares, end of year		149,914		$	32.88		177,695		$	27.10		213,516		$	25.37

The following table summarizes Trustmark’s time-vested award activity for the periods presented:

	Years Ended December 31,
	2019					2018					2017
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
				Grant-Date					Grant-Date					Grant-Date
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Nonvested shares, beginning of year		321,870		$	28.48		320,357		$	25.40		322,056		$	22.65
Granted		113,673			33.42		118,325			31.96		105,524			33.79
Released from restriction		(124,598	)		21.64		(107,180	)		23.02		(101,289	)		25.35
Forfeited		(10,939	)		32.73		(9,632	)		29.30		(5,934	)		26.52
Nonvested shares, end of year		300,006		$	33.04		321,870		$	28.48		320,357		$	25.40

Compensation Expense for Awards Under Stock Plan

The following table presents information regarding compensation expense for awards under the Stock Plan for the periods presented ($ in thousands):

							At December 31, 2019
	Recognized Compensation Expense						Unrecognized		Weighted Average
	for Years Ended December 31,						Compensation		Life of Unrecognized
	2019		2018		2017		Expense		Compensation Expense
Performance awards	$	1,524	$	861	$	1,387	$	1,914		1.59
Time-vested awards		3,263		3,009		2,922		3,726		1.73
Total	$	4,787	$	3,870	$	4,309	$	5,640