Pension Plans and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

Components of net periodic benefit cost included in net income are as follows:

	Pension Benefits												Other Benefits
	Three Months Ended						Six Months Ended						Three Months Ended						Six Months Ended
	June 30,						June 30,						June 30,						June 30,
	2014			2013			2014			2013			2014			2013			2014			2013
	(In thousands)
Service cost	$	9,651		$	11,542		$	19,297		$	23,120		$	216		$	248		$	432		$	496
Interest cost		30,361			27,838			60,688			55,626			977			993			1,946			1,898
Expected return on plan assets		(37,389	)		(36,611	)		(74,766	)		(73,281	)		(575	)		(537	)		(1,150	)		(1,075	)
Amortization of prior service cost (credit)		635			792			1,269			1,584			(40	)		(82	)		(80	)		(73	)
Net periodic benefit cost	$	3,258		$	3,561		$	6,488		$	7,049		$	578		$	622		$	1,148		$	1,246