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Pension and postretirement benefits (Tables)

9 Months Ended

Sep. 30, 2018

Pension Plans, Defined Benefit [Member]

Schedule Of Net Benefit Costs Table Text Block

		Pension Plan				Benefit Restoration Plans
		Quarters ended September 30,				Quarters ended September 30,
(In thousands)		2018		2017		2018		2017
Other operating expenses:
Interest cost	$	6,029	$	6,120	$	344	$	352
Expected return on plan assets		(9,551)		(10,186)		(509)		(502)
Amortization of net loss		4,716		5,053		349		411
Total net periodic pension cost (benefit)	$	1,194	$	987	$	184	$	261

		Pension Plans				Benefit Restoration Plans
		Nine months ended September 30,				Nine months ended September 30,
(In thousands)		2018		2017		2018		2017
Other operating expenses:
Interest cost	$	18,086	$	18,359	$	1,033	$	1,057
Expected return on plan assets		(28,653)		(30,557)		(1,527)		(1,508)
Amortization of net loss		14,147		15,160		1,048		1,233
Total net periodic pension cost (benefit)	$	3,580	$	2,962	$	554	$	782

Other Postretirement Benefit Plans Defined Benefit [Member]

Schedule Of Net Benefit Costs Table Text Block

		Postretirement Benefit Plan
		Quarters ended September 30,				Nine months ended September 30,
(In thousands)		2018		2017		2018		2017
Personnel Costs:
Service cost	$	257	$	256	$	771	$	769
Other operating expenses:
Interest cost		1,390		1,426		4,171		4,277
Amortization of prior service cost		(868)		(950)		(2,603)		(2,850)
Amortization of net loss		321		142		962		426
Total postretirement cost	$	1,100	$	874	$	3,301	$	2,622

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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