Pension Plan (Tables)

3 Months Ended

Mar. 31, 2013

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, 2013 and 2012:

	Three Months Ended March 31,
	2013			2012
	(in thousands)
Service cost	$	1,987		$	1,964
Interest cost		1,657			1,598
Expected return on plan assets		(2,559	)		(2,233	)
Amortization of prior service cost		202			177
Amortization of actuarial loss		794			582
Total net periodic pension expense		2,081			2,088
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Amortization of prior service cost		(202	)		(177	)
Amortization of actuarial loss		(794	)		(582	)
		(996	)		(759	)
Total amount recognized in net periodic benefit cost and other comprehensive income (before tax)	$	1,085		$	1,329