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Components of Accumulated other comprehensive loss (Tables)
 3 Months Ended
Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Accumulated Other Comprehensive Loss
 
March 31, 2014
December 31, 2013
Defined benefit plan liabilities
$
(91,318
)
$
(92,177
)
Equity in investee other comprehensive income (1)
(12,650
)
(12,650
)
Unrealized loss on financial instruments
(1,111
)
(1,064
)
Other comprehensive loss before income tax effect
(105,079
)
(105,891
)
Income tax effect (2)
13,346

14,059

Accumulated other comprehensive loss
$
(91,733
)
$
(91,832
)
(1)
The amount includes our equity in the other comprehensive income of Mt. Holly.
(2)The allocation of the income tax effect to the components of other comprehensive income is as follows:
 
March 31, 2014
December 31, 2013
Defined benefit plan liabilities
$
13,552

$
14,256

Equity in investee other comprehensive income
401

418

Unrealized loss on financial instruments
(607
)
(615
)
Accumulated balances for each component of AOCI
The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCI"):
 
Defined benefit plan and other postretirement liabilities
Equity in investee other comprehensive income
Unrealized loss on financial instruments
Total, net of tax
Balance, December 31, 2012
$
(137,441
)
$
(12,224
)
$
(1,527
)
$
(151,192
)
Other comprehensive income (loss) before reclassifications
—

(17
)
—

(17
)
Net amount reclassified to net loss
950

—

(38
)
912

Balance, March 31, 2013
$
(136,491
)
$
(12,241
)
$
(1,565
)
$
(150,297
)
 
 
 
 
 
Balance, December 31, 2013
$
(77,921
)
$
(12,232
)
$
(1,679
)
$
(91,832
)
Other comprehensive income (loss) before reclassifications
—

(17
)
—

(17
)
Net amount reclassified to net loss
155

—

(39
)
116

Balance, March 31, 2014
$
(77,766
)
$
(12,249
)
$
(1,718
)
$
(91,733
)
Reclassification out of AOCI
Reclassifications out of AOCI were included in the consolidated statements of operations as follows:
 
 
For the three months ended March 31,
AOCI Components
Location
2014
2013
Defined benefit plan and other postretirement liabilities
Cost of goods sold
$
590

$
1,084

 
Selling, general and administrative expenses
268

240

 
Income tax expense
(703
)
(374
)
 
Net of tax
$
155

$
950

 
 
 
 
Equity in investee other comprehensive income
Cost of goods sold
$
—

$
—

 
Income tax expense
(17
)
(17
)
 
Net of tax
$
(17
)
$
(17
)
 
 
 
 
Unrealized loss on financial instruments
Cost of goods sold
$
(47
)
$
(46
)
 
Income tax expense
8

8

 
Net of tax
$
(39
)
$
(38
)