Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2013

Pension and Other Postretirement Benefit Expense [Abstract]

Other Postretirement Benefit Costs Table Text Block [Table Text Block]

The following table details the components of other postretirement benefit costs (credits):

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In thousands)
Service cost	$	538		$	539		$	1,094		$	1,088
Interest cost	415			520			846			1,011
Curtailments	—			(1,837		)	—			(1,837		)
Amortization of prior service credits	(2,730		)	(2,876		)	(5,480		)	(5,871		)
Amortization of other actuarial losses (gains)	(75		)	(171		)	2			(261		)
Net benefit credit	$	(1,852	)	$	(3,825	)	$	(3,538	)	$	(5,870	)

Pension Benefit Costs

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(In thousands)
Service cost	$	6,790		$	7,310		$	14,490		$	14,906
Interest cost	3,876			4,092			7,802			8,072
Curtailments	—			324			—			324
Expected return on plan assets	(6,036		)	(5,477		)	(11,842		)	(11,015		)
Amortization of prior service costs (credits)	57			(37		)	(101		)	(73		)
Amortization of other actuarial losses	4,264			4,200			8,814			7,771
Net benefit cost	$	8,951		$	10,412		$	19,163		$	19,985