Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Post-Retirement Benefit Costs

The following tables present a summary of post-retirement benefit costs by component.

Components of Post-Retirement Benefit Costs

	Three Months ended March 31,
	Pension Benefits						Other Benefits
	2013			2012			2013		2012
Service cost	$	3,765		$	2,691		$	85	$	124
Interest cost		4,264			4,152			260		257
Expected return on assets		(4,356	)		(4,120	)		0		0
Prior service cost		571			516			0		0
Net actuarial (gain)/loss		4,063			2,966			0		0
Net periodic benefit cost	$	8,307		$	6,205		$	345	$	381

Schedule of Defined-Benefit Plans Disclosures

The following chart presents assets at fair value for the defined-benefit pension plans at March 31, 2013 and the prior-year end.

Pension Assets by Component

(Dollar amounts in thousands)

	March 31, 2013				December 31, 2012
	Amount		%		Amount		%
Corporate debt	$	163,462		57.2	$	169,817		61.2
Other fixed maturities		308		0.1		327		0.1
Equity securities		101,092		35.4		89,833		32.4
Short-term investments		5,081		1.8		2,218		0.8
Guaranteed annuity contract		13,243		4.6		13,277		4.8
Other		2,580		0.9		2,169		0.7
Total	$	285,766		100.0	$	277,641		100.0