Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

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)	2013			2012
Components of net periodic benefit cost:
Service cost	$	3,602		$	2,632
Interest cost	2,718			2,700
Expected long-term return on assets	(3,713		)	(3,563		)
Actuarial loss	3,690			2,099
Prior service cost amortization	122			129
Settlement charge	144			—
Net periodic expense	$	6,563		$	3,997

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)	2013			2012
Components of net periodic benefit cost:
Service cost	$	444		$	463
Interest cost	869			1,062
Expected long-term return on assets	(1,242		)	(1,109		)
Actuarial loss	—			9
Transition amortization	324			479
Net periodic expense	$	395		$	904