Benefit Plans (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2014 and 2013:

	Three Months Ended    March 31,
	2014			2013
	(in thousands)
Service cost	$	—		$	1,987
Interest cost	1,731			1,657
Expected return on plan assets	(3,242		)	(2,559		)
Amortization of prior service cost	—			202
Amortization of actuarial loss	62			794
Total net periodic pension (income) expense	$	(1,449	)	$	2,081