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Employee benefit plans (Tables)

9 Months Ended

Sep. 30, 2014

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of net benefit costs

Components of net periodic benefit cost for the Company's pension and other postretirement benefit plans were as follows:

							Other
							Postretirement
	Pension Benefits						Benefits
Three Months Ended September 30,	2014			2013			2014			2013
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	32		$	39		$	379		$	419
Interest cost	4,420			4,062			919			804
Expected return on assets	(5,304		)	(4,979		)	(1,154		)	(1,086		)
Amortization of prior service cost (credit)	18			18			(348		)	(364		)
Amortization of net actuarial loss	1,217			1,793			162			327
Net periodic benefit cost (credit), including amount capitalized	383			933			(42		)	100
Less amount capitalized	27			157			(65		)	47
Net periodic benefit cost	$	356		$	776		$	23		$	53

							Other
							Postretirement
	Pension Benefits						Benefits
Nine Months Ended September 30,	2014			2013			2014			2013
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	96		$	116		$	1,138		$	1,257
Interest cost	13,265			12,186			2,701			2,411
Expected return on assets	(15,913		)	(14,937		)	(3,463		)	(3,258		)
Amortization of prior service cost (credit)	54			54			(1,044		)	(1,092		)
Amortization of net actuarial loss	3,651			5,373			486			1,405
Net periodic benefit cost (credit), including amount capitalized	1,153			2,792			(182		)	723
Less amount capitalized	195			425			(55		)	137
Net periodic benefit cost (credit)	$	958		$	2,367		$	(127	)	$	586

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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=35743120&loc=d3e1928-114920

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