Pension and postretirement benefits (Tables)

3 Months Ended

Mar. 31, 2012

Pension Plans, Defined Benefit [Member]

Schedule Of Net Benefit Costs Table Text Block

		Pension Plan				Benefit Restoration Plans
		Quarters ended March 31,				Quarters ended March 31,
(In thousands)		2012		2011		2012		2011
Interest cost	$	7,495	$	7,785	$	393	$	395
Expected return on plan assets		(9,810)		(10,840)		(526)		(451)
Amortization of net loss		5,426		2,828		323		148
Total net periodic pension cost (benefit)	$	3,111	$	(227)	$	190	$	92

Other Postretirement Benefit Plans Defined Benefit [Member]

Schedule Of Net Benefit Costs Table Text Block

		Quarters ended March 31,
(In thousands)		2012		2011
Service cost	$	548	$	504
Interest cost		1,950		2,136
Amortization of prior service cost		(50)		(240)
Amortization of net loss		540		267
Total postretirement cost	$	2,988	$	2,667