Pension Benefits (Tables)

3 Months Ended

Mar. 31, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of the net periodic benefit cost for both the Qualified and the Nonqualified Pension Plan

The following table presents the components of the net periodic benefit cost for the Pension Plans:

	For the Three Months Ended March 31,
	2013			2012
	(in thousands)
Service cost	$	1,232		$	950
Interest cost	345			296
Expected return on plan assets that reduces periodic pension costs	(286		)	(220		)
Amortization of prior service costs	4			—
Amortization of net actuarial loss	197			101
Net periodic benefit cost	$	1,492		$	1,127