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Components of accumulated other comprehensive loss
 3 Months Ended
Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of accumulated other comprehensive loss
Components of accumulated other comprehensive loss
 
March 31, 2016
December 31, 2015
Defined benefit plan liabilities
$
(120,658
)
$
(121,910
)
Unrealized loss on financial instruments
(1,481
)
(1,435
)
Other comprehensive loss before income tax effect
(122,139
)
(123,345
)
Income tax effect (1)
10,312

10,695

Accumulated other comprehensive loss
$
(111,827
)
$
(112,650
)

(1)
The allocation of the income tax effect to the components of other comprehensive income is as follows:
 
March 31, 2016
December 31, 2015
Defined benefit plan liabilities
$
10,852

$
11,243

Unrealized loss on financial instruments
(540
)
(548
)



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 loss on financial instruments
Total, net of tax
Balance, December 31, 2015
$
(110,667
)
$
(1,983
)
$
(112,650
)
Net amount reclassified to net loss
861

(38
)
823

Balance, March 31, 2016
$
(109,806
)
$
(2,021
)
$
(111,827
)
 
 
 
 
Balance, December 31, 2014
$
(115,852
)
$
(1,830
)
$
(117,682
)
Net amount reclassified to net income
117

(39
)
78

Balance, March 31, 2015
$
(115,735
)
$
(1,869
)
$
(117,604
)





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

 
 
For the three months ended March 31
AOCL Components
Location
2016
2015
Defined benefit plan and other postretirement liabilities
Cost of goods sold
$
777

$
325

 
Selling, general and administrative expenses
125

183

 
Other operating expense, net
350

—

 
Income tax expense
(391
)
(391
)
 
Net of tax
$
861

$
117

 
 
 
 
Unrealized loss on financial instruments
Cost of goods sold
$
(46
)
$
(47
)
 
Income tax benefit
8

8

 
Net of tax
$
(38
)
$
(39
)