Pension Benefits (Tables)

6 Months Ended

Jun. 30, 2015

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 June 30,						For the Six Months Ended June 30,
	2015			2014			2015			2014
	(in thousands)
Service cost	$	2,390		$	1,595		$	3,974		$	3,168
Interest cost	700			688			1,248			1,095
Expected return on plan assets that reduces periodic pension costs	(597		)	(604		)	(1,091		)	(989		)
Amortization of prior service costs	5			5			9			9
Amortization of net actuarial loss	571			38			743			344
Net periodic benefit cost	$	3,069		$	1,722		$	4,883		$	3,627