Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Pension Expense Related to Qualified and Non-Qualified Plans

The following table sets forth the components of net periodic pension expense related to the qualified and non-qualified plans for the three and nine months ended September 30, 2014 and 2013:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in thousands)
Service cost	$	—		$	1,530		$	—		$	5,573
Interest cost	1,731			1,640			5,194			5,005
Expected return on plan assets	(3,242		)	(3,334		)	(9,727		)	(9,076		)
Amortization of prior service cost	—			229			—			672
Amortization of net loss	63			357			187			1,962
Curtailment loss	—			—			—			750
Total net periodic pension (income) expense	$	(1,448	)	$	422		$	(4,346	)	$	4,886