Other comprehensive income

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Other comprehensive income

Other comprehensive income

Reclassification adjustments– Information regarding amounts reclassified from accumulated other comprehensive loss to net income was as follows:

Accumulated other comprehensive loss components	Amounts reclassified from accumulated other comprehensive loss												Affected line item in consolidated statements of comprehensive income
	Quarter Ended September 30,						Nine Months Ended September 30,
(in thousands)	2016			2015			2016			2015
Amortization of postretirement benefit plan items:
Prior service credit	$	355		$	355		1,066			1,066			(1)
Net actuarial loss	(949		)	(780		)	(2,848		)	(2,340		)	(1)
Total amortization	(594		)	(425		)	(1,782		)	(1,274		)	(1)
Tax benefit	181			113			544			339			(1)
Total reclassifications, net of tax	$	(413	)	$	(312	)	$	(1,238	)	$	(935	)

⁽¹⁾ Amortization of postretirement benefit plan items is included in the computation of net periodic benefit income. Additional details can be found in Note 10.

Accumulated other comprehensive loss– Changes in the components of accumulated other comprehensive loss during the nine months ended September 30, 2016 were as follows:

(in thousands)	Postretirement benefit plans, net of tax			Net unrealized loss on marketable securities, net of tax(1)			Currency translation adjustment			Accumulated other comprehensive loss
Balance, December 31, 2015	$	(38,822	)	$	(114	)	$	(16,267	)	$	(55,203	)
Other comprehensive income before reclassifications	—			40			3,866			3,906
Amounts reclassified from accumulated other comprehensive loss	1,238			—			—			1,238
Net current-period other comprehensive income	1,238			40			3,866			5,144
Balance, September 30, 2016	$	(37,584	)	$	(74	)	$	(12,401	)	$	(50,059	)

⁽¹⁾ Other comprehensive income before reclassifications is net of income tax expense of $14.