Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit (Income) Cost for the Pension Plans

Net periodic benefit (income) cost for the pension plans included the following components for the three months ended March 31:

	2014			2013
	(in thousands)
Service cost	$	1,909		$	4,976
Interest cost		25,502			22,407
Expected return on plan assets		(36,197	)		(33,518	)
Amortization of prior service credit		(464	)		(1,894	)
Amortization of actuarial loss		6,595			21,112
Net periodic benefit (income) cost	$	(2,655	)	$	13,083