Defined Benefit and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2012

Defined Benefit and Other Postretirement Benefits [Abstract]

Net periodic benefit Cost

The following table presents information regarding the plan's net periodic benefit cost for the periods presented ($ in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Net periodic benefit cost
Service cost	$	134		$	124		$	413		$	398
Interest cost		947			1,115			2,837			3,345
Expected return on plan assets		(1,438	)		(1,470	)		(4,238	)		(4,412	)
Recognized net actuarial loss		1,303			1,026			3,921			3,100
Net periodic benefit cost	$	946		$	795		$	2,933		$	2,431

Trustmark maintains a nonqualified supplemental retirement plan covering directors who elected to defer fees, key executive officers and senior officers.  The plan provides for defined death benefits and/or retirement benefits based on a participant's covered salary.  Trustmark has acquired life insurance contracts on the participants covered under the plan, which may be used to fund future payments under the plan.  The measurement date for the plan is December 31. The following table presents information regarding the plan's net periodic benefit cost for the periods presented ($ in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Net periodic benefit cost
Service cost	$	170	$	147	$	510	$	441
Interest cost		517		569		1,550		1,707
Amortization of prior service cost		63		59		188		177
Recognized net actuarial loss		215		124		645		372
Net periodic benefit cost	$	965	$	899	$	2,893	$	2,697