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Accumulated Other Comprehensive Income (Loss)
 9 Months Ended
Sep. 30, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive income (loss) (AOCI), net of tax, is as follows:
Three months ended September 30, 2018
(dollars in thousands)
 
Foreign Currency Translation
 
Derivative Instruments
 
Pension and Other Post-retirement Benefits
 
Accumulated Other
Comprehensive Loss
Balance on June 30, 2018
 
$
(19,242
)
 
$
2,018

 
$
(85,706
)
 
$
(102,930
)
 
 
 
 
 
 
 
 
 
Amounts recognized into AOCI
 
(2,707
)
 
(819
)
 
—

 
(3,526
)
Currency impact
 
—

 
—

 
(356
)
 
(356
)
Amounts reclassified from AOCI
 
—

 
(183
)
(1) 
1,586

(2) 
1,403

Tax effect
 
—

 
268

 
(356
)
 
(88
)
Other comprehensive income (loss), net of tax
 
(2,707
)

(734
)

874


(2,567
)
Balance on September 30, 2018
 
$
(21,949
)
 
$
1,284

 
$
(84,832
)
 
$
(105,497
)
 
 
 
 
 
 
 
 
 
Nine months ended September 30, 2018
(dollars in thousands)
 
Foreign Currency Translation
 
Derivative Instruments
 
Pension and Other Post-retirement Benefits
 
Accumulated Other
Comprehensive Loss
Balance on December 31, 2017
 
$
(16,183
)
 
$
351

 
$
(89,340
)
 
$
(105,172
)
 
 
 
 
 
 
 
 
 
Cumulative-effect adjustment for the adoption of ASU 2017-12
 
—

 
(275
)
 
—

 
(275
)
 
 
 
 
 
 
 
 
 
Amounts recognized into AOCI
 
(5,766
)
 
1,248

 
1,527

 
(2,991
)
Currency impact
 
—

 
—

 
(316
)
 
(316
)
Amounts reclassified from AOCI
 
—

 
154

(1) 
4,756

(2) 
4,910

Tax effect
 
—

 
(194
)
 
(1,459
)
 
(1,653
)
Other comprehensive income (loss), net of tax
 
(5,766
)
 
1,208

 
4,508

 
(50
)
Balance on September 30, 2018
 
$
(21,949
)
 
$
1,284

 
$
(84,832
)
 
$
(105,497
)

Three months ended September 30, 2017
(dollars in thousands)
 
Foreign Currency Translation
 
Derivative Instruments
 
Pension and Other Post-retirement Benefits
 
Accumulated Other
Comprehensive Loss
Balance on June 30, 2017
 
$
(20,831
)
 
$
(913
)
 
$
(93,404
)
 
$
(115,148
)
 
 
 
 
 
 
 
 
 
Amounts recognized into AOCI
 
3,477

 
93

 
—

 
3,570

Currency impact
 
—

 
—

 
110

 
110

Amounts reclassified from AOCI
 
—

 
434

(1) 
1,341

(2) 
1,775

Tax effect
 
(827
)
 
70

 
(29
)
 
(786
)
Other comprehensive income (loss), net of tax
 
2,650


597


1,422


4,669

Balance on September 30, 2017
 
$
(18,181
)
 
$
(316
)
 
$
(91,982
)
 
$
(110,479
)
 
 
 
 
 
 
 
 
 
Nine months ended September 30, 2017
(dollars in thousands)
 
Foreign Currency Translation
 
Derivative Instruments
 
Pension and Other Post-retirement Benefits
 
Accumulated Other
Comprehensive Loss
Balance on December 31, 2016
 
$
(27,828
)
 
$
(515
)
 
$
(96,854
)
 
$
(125,197
)
 
 
 
 
 
 
 
 
 
Amounts recognized into AOCI
 
10,474

 
(1,031
)
 
4,801

 
14,244

Currency impact
 
—

 
—

 
(628
)
 
(628
)
Amounts reclassified from AOCI
 
—

 
1,334

(1) 
4,011

(2) 
5,345

Tax effect
 
(827
)
 
(104
)
 
(3,312
)
 
(4,243
)
Other comprehensive income (loss), net of tax
 
9,647

 
199

 
4,872

 
14,718

Balance on September 30, 2017
 
$
(18,181
)
 
$
(316
)
 
$
(91,982
)
 
$
(110,479
)
___________________________
(1) 
We reclassified natural gas contracts through cost of sales and the interest rate swaps through interest expense on the Condensed Consolidated Statements of Operations. See note 8 for additional information.
(2) 
We reclassified the net pension and non-pension post-retirement benefits amortization and settlement charges through other income (expense) on the Condensed Consolidated Statements of Operations. See note 6 for additional information.