Defined Benefit and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Defined Benefit and Other Postretirement Benefits [Abstract]

Net periodic benefit Cost

Capital Accumulation Plan

The following tables present information regarding the plan's benefit obligation, plan assets, funded status of the plan, amounts recognized in accumulated other comprehensive income (loss), net periodic benefit cost and other statistical disclosures ($ in thousands):

	Years Ended December 31,
	2011			2010			2009
Net periodic benefit cost
Service cost	$	522		$	550		$	392
Interest cost		4,460			4,777			4,837
Expected return on plan assets		(5,882	)		(5,926	)		(6,036	)
Amortization of prior service credits		-			-			(127	)
Curtailment gain		-			-			(1,887	)
Recognized net actuarial loss		4,127			3,397			2,872
Net periodic benefit cost	$	3,227		$	2,798		$	51
Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes
Net loss (gain)	$	9,707		$	(4,035	)	$	(3,032	)
Amortization of prior service credits		-			-			2,015
Total recognized in other comprehensive income (loss)	$	9,707		$	(4,035	)	$	(1,017	)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$	12,934		$	(1,237	)	$	(966	)
Weighted-average assumptions as of end of year
Discount rate for benefit obligation		4.00	%		5.05	%		5.50	%
Discount rate for net periodic benefit cost		5.05	%		5.50	%		6.00	%
Expected long-term return on plan assets		8.00	%		8.00	%		8.00	%
Rate of compensation increase		3.00	%		4.00	%		4.00	%

Supplemental Retirement Plan

	Years Ended December 31,
	2011			2010			2009
Net periodic benefit cost
Service cost	$	589		$	756		$	913
Interest cost		2,276			2,242			2,209
Amortization of prior service cost		236			152			150
Recognized net actuarial loss		495			355			237
Net periodic benefit cost	$	3,596		$	3,505		$	3,509
Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss), before taxes
Net loss	$	5,336		$	2,272		$	2,115
Prior service cost		1,192			28			20
Amortization of prior service cost		(236	)		(152	)		(150	)
Total recognized in other comprehensive income (loss)	$	6,292		$	2,148		$	1,985
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$	9,888		$	5,653		$	5,494
Weighted-average assumptions as of end of year
Discount rate for benefit obligation		4.00	%		5.05	%		5.50	%
Discount rate for net periodic benefit cost		5.05	%		5.50	%		6.00	%

Plan benefit obligation, plan assets and funded status of the plan

Capital Accumulation Plan

The following tables present information regarding the plan's benefit obligation, plan assets, funded status of the plan, amounts recognized in accumulated other comprehensive income (loss), net periodic benefit cost and other statistical disclosures ($ in thousands):

	December 31,
	2011			2010
Change in benefit obligation
Benefit obligation, beginning of year	$	94,136		$	91,709
Service cost		522			550
Interest cost		4,460			4,777
Actuarial loss		7,620			3,766
Benefits paid		(6,182	)		(6,666	)
Benefit obligation, end of year	$	100,556		$	94,136
Change in plan assets
Fair value of plan assets, beginning of year	$	77,764		$	72,175
Actual return on plan assets		(331	)		10,330
Employer contributions		1,053			1,925
Benefit payments		(6,182	)		(6,666	)
Fair value of plan assets, end of year	$	72,304		$	77,764
Funded status at end of year - net liability	$	(28,252	)	$	(16,372	)
Amounts recognized in accumulated other comprehensive income (loss)
Net loss - amount recognized	$	49,040		$	39,333

Supplemental Retirement Plan

	December 31,
	2011			2010
Change in benefit obligation
Benefit obligation, beginning of year	$	45,433		$	41,598
Service cost		589			756
Interest cost		2,276			2,242
Actuarial loss		5,831			2,627
Benefits paid		(2,676	)		(1,818	)
Prior service cost due to amendment		1,193			28
Benefit obligation, end of year	$	52,646		$	45,433
Change in plan assets
Fair value of plan assets, beginning of year	$	-		$	-
Employer contributions		2,676			1,818
Benefit payments		(2,676	)		(1,818	)
Fair value of plan assets, end of year	$	-		$	-
Funded status at end of year - net liability	$	(52,646	)	$	(45,433	)
Amounts recognized in accumulated other comprehensive income (loss)
Net loss	$	17,226		$	11,890
Prior service cost		2,412			1,455
Amounts recognized	$	19,638		$	13,345

Weighted-average asset allocation

Trustmark's capital accumulation plan weighted-average asset allocations at December 31, 2011 and 2010, by asset category are as follows:

	2011			2010
Money market fund		3.0	%		1.7	%
Fixed income mutual funds		19.9	%		18.4	%
Equity mutual funds		70.4	%		73.7	%
Equity securities		6.3	%		5.4	%
Fixed income hedge fund		0.4	%		0.8	%
Total		100.0	%		100.0	%

Plan assets measured at fair value

The following table sets forth by level, within the fair value hierarchy, the plan's assets measured at fair value at December 31, 2011 and 2010 ($ in thousands):

	December 31, 2011
	Total		Level 1		Level 2		Level 3
Money market fund	$	2,189	$	-	$	2,189	$	-
Fixed income mutual funds		14,422		14,422		-		-
Equity mutual funds		50,886		50,886		-		-
Equity securities		4,506		4,506		-		-
Fixed income hedge fund		301		-		-		301
Total assets at fair value	$	72,304	$	69,814	$	2,189	$	301
	December 31, 2010
	Total		Level 1		Level 2		Level 3
Money market fund	$	1,297	$	-	$	1,297	$	-
Fixed income mutual funds		14,341		14,341		-		-
Equity mutual funds		57,334		57,334		-		-
Equity securities		4,195		4,195		-		-
Fixed income hedge fund		597		-		-		597
Total assets at fair value	$	77,764	$	75,870	$	1,297	$	597

Changes in fair value of plan level three assets

The following table sets forth a summary of changes in fair value of the plan's Level 3 assets for the years ended December 31, 2011 and 2010 ($ in thousands):

	Fixed Income Hedge Fund
Balance, January 1, 2010	$	4,930
Sales, net		(5,016	)
Net gains included in plan		678
Change in fair value		5
Balance, December 31, 2010		597
Sales, net		(373	)
Net losses included in plan		(8	)
Change in fair value		85
Balance, December 31, 2011	$	301

Estimated future benefit payments and other disclosures

Estimated Future Benefit Payments and Other Disclosures

The following plan benefit payments, which reflect expected future service, are expected to be paid ($ in thousands):

Year	Amount
2012	$	12,209
2013		7,593
2014		7,700
2015		6,706
2016		6,554
2017-2021		30,205

Estimated Supplemental Retirement Plan Payments and Other Disclosures

The following supplemental retirement plan benefit payments are expected to be paid in the following years ($ in thousands):

Year	Amount
2012	$	2,357
2013		2,613
2014		2,771
2015		2,951
2016		3,122
2017 - 2021		17,665