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Pension and other postretirement benefits (Tables)

3 Months Ended

Mar. 29, 2015

Compensation and Retirement Disclosure [Abstract]

Net Benefit Cost of Pension and Postretirement Benefit Plans

Net benefit cost of pension and postretirement benefit plans consisted of the following:

	Pension Three Months Ended								Other Postretirement Benefits Three Months Ended
	March 29, 2015				March 30, 2014				March 29, 2015				March 30, 2014
	(Dollars in thousands)
Service cost	$	471			$	450			$	107			$	138
Interest cost	4,486				4,483				512				597
Expected return on plan assets	(6,425		)		(6,260		)		—				—
Net amortization and deferral	1,530				1,071				77				26
Net benefit expense (income)	$	62			$	(256	)		$	696			$	761

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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=58740216&loc=d3e1928-114920

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