Components of accumulated other comprehensive loss (Tables)

9 Months Ended

Sep. 30, 2017

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

Accumulated balances for each component of AOCI

	September 30, 2017			December 31, 2016
Defined benefit plan liabilities	$	(122,705	)	$	(125,917	)
Unrealized loss on financial instruments	2,720			2,860
Other comprehensive loss before income tax effect	(119,985		)	(123,057		)
Income tax effect (1)	8,020			9,164
Accumulated other comprehensive loss	$	(111,965	)	$	(113,893	)

(1) The allocation of the income tax effect to the components of other comprehensive loss is as follows:

	September 30, 2017			December 31, 2016
Defined benefit plan liabilities	$	8,564		$	9,736
Unrealized loss on financial instruments	(544		)	(572		)

The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCL"):

	Defined benefit plan and other postretirement liabilities			Unrealized gain (loss) on financial instruments			Total, net of tax
Balance, July 1, 2017	$	(115,225	)	$	2,213		$	(113,012	)
Net amount reclassified to net income	1,084			(37		)	1,047
Balance, September 30, 2017	$	(114,141	)	$	2,176		$	(111,965	)
Balance, July 1, 2016	$	(108,944	)	$	(2,059	)	$	(111,003	)
Net amount reclassified to net loss	862			(38		)	824
Balance, September 30, 2016	$	(108,082	)	$	(2,097	)	$	(110,179	)
Balance, December 31, 2016	$	(116,181	)	$	2,288		$	(113,893	)
Net amount reclassified to net loss	2,040			(112		)	1,928
Balance, September 30, 2017	$	(114,141	)	$	2,176		$	(111,965	)
Balance, December 31, 2015	$	(110,667	)	$	(1,983	)	$	(112,650	)
Net amount reclassified to net loss	2,585			(114		)	2,471
Balance, September 30, 2016	$	(108,082	)	$	(2,097	)	$	(110,179	)

Reclassification out of AOCI

Reclassifications out of AOCL were included in the consolidated statements of operations as follows:

		For the three months ended September 30,						For the nine months ended September 30,
AOCL Components	Location	2017			2016			2017			2016
Defined benefit plan and other postretirement liabilities	Cost of goods sold	$	983		$	777		$	821		$	2,332
	Selling, general and administrative expenses	109			125			1,086			375
	Other operating expense, net	383			350			1,306			1,050
	Income tax effect	(391		)	(390		)	(1,173		)	(1,172		)
	Net of tax	$	1,084		$	862		$	2,040		$	2,585
Unrealized loss on financial instruments	Cost of goods sold	$	(46	)	$	(46	)	$	(140	)	$	(139	)
	Income tax effect	9			8			28			25
	Net of tax	$	(37	)	$	(38	)	$	(112	)	$	(114	)