Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Pension Plans

Defined Benefit Plan Disclosure

Schedule of Net Benefit Costs

The components of net pension expense for the Company’s two defined benefit non-contributory pension plans and certain nonqualified supplemental pension plans were:

	Three months ended March 31,
(in thousands)	2012			2011
Components of net periodic benefit cost:
Service cost	$	2,632		$	2,293
Interest cost	2,700			2,740
Expected long-term return on assets	(3,563		)	(3,868		)
Actuarial loss	2,099			1,609
Prior service cost amortization	129			124
Net periodic expense	$	3,997		$	2,898

Postretirement Benefit Plans

Defined Benefit Plan Disclosure

Schedule of Net Benefit Costs

The components of net periodic postretirement benefit expense for the Company’s postretirement benefit plans were:

	Three months ended March 31,
(in thousands)	2012			2011
Components of net periodic benefit cost:
Service cost	$	463		$	442
Interest cost	1,062			1,111
Expected long-term return on assets	(1,109		)	(1,104		)
Actuarial loss	9			—
Transition amortization	479			479
Net periodic expense	$	904		$	928