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Derivatives (Tables)
 12 Months Ended
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]  
Fair Values of Derivative Instruments
The following table provides the fair values of our derivative financial instruments for the periods presented:
 
 
Asset Derivatives:
(dollars in thousands)
 
December 31, 2014
 
December 31, 2013
Derivatives designated as hedging
instruments under FASB ASC 815:
 
Balance Sheet Location
 
Fair Value
 
Balance Sheet Location
 
Fair Value
Natural gas contracts
 
Prepaid and other current assets
 
$
—

 
Prepaid and other current assets
 
$
394

Natural gas contracts
 
Other assets
 
—

 
Other assets
 
19

Total designated
 
 
 
—

 
 
 
413

Derivatives not designated as hedging
instruments under FASB ASC 815:
 
 
 
 
 
 
 
 

Currency contracts
 
Prepaid and other current assets
 
403

 
Prepaid and other current assets
 
—

Total undesignated
 
 
 
403

 
 
 
—

Total
 
 
 
$
403

 
 
 
$
413

 
 
Liability Derivatives:
(dollars in thousands)
 
December 31, 2014
 
December 31, 2013
Derivatives designated as hedging
instruments under FASB ASC 815:
 
Balance Sheet Location
 
Fair Value
 
Balance Sheet Location
 
Fair Value
Natural gas contracts
 
Derivative liability - current
 
$
1,222

 
Derivative liability - current
 
$
—

Natural gas contracts
 
Other long-term liabilities
 
103

 
Other long-term liabilities
 
—

Interest rate contract
 
Other long-term liabilities
 
—

 
Other long-term liabilities
 
1,866

Total designated
 
 
 
1,325

 
 
 
1,866

Derivatives not designated as hedging
instruments under FASB ASC 815:
 
 
 
 
 
 
 
 
Natural gas contracts
 
Derivative liability - current
 
1,431

 
Derivative liability - current
 
—

Natural gas contracts
 
Other long-term liabilities
 
112

 
Other long-term liabilities
 
—

Interest rate contract
 
Other long-term liabilities
 
—

 
Other long-term liabilities
 
207

Total undesignated
 
 
 
1,543

 
 
 
207

Total
 
 
 
$
2,868

 
 
 
$
2,073
Summary of the Effective Portion of Derivative Gain (Loss) Recognized in Other Comprehensive Income (Loss)
The following table provides a summary of the effective portion of derivative gain (loss) recognized in other comprehensive income (loss):
Year ended December 31,
(dollars in thousands)
 
2014
 
2013
 
2012
Derivatives in Cash Flow Hedging relationships:
 
 
 
 
 
 
Natural gas contracts
 
$
(1,392
)
 
$
777

 
$
(1,439
)
Total
 
$
(1,392
)
 
$
777

 
$
(1,439
)
Reclassification out of Accumulated Other Comprehensive Loss
The following table provides a summary of the effective portion of derivative gain (loss) reclassified from accumulated other comprehensive loss to the Consolidated Statements of Operations:
Year ended December 31,
(dollars in thousands)
 
Location:
 
2014
 
2013
 
2012
Natural gas contracts
 
Cost of sales
 
$
573

 
$
(57
)
 
$
(4,707
)
Total impact on net income (loss)
 
 
 
$
573

 
$
(57
)
 
$
(4,707
)
Summary of Derivatives Not Designated as Hedging Instruments Recognized in the Statements of Operations
Gains (losses) for derivatives that were not designated as hedging instruments are recorded in current earnings as follows:
Year ended December 31,
(dollars in thousands)
 
Location:
 
2014
 
2013
 
2012
Currency contracts
 
Other income (expense)
 
$
403

 
$
(41
)
 
$
(24
)
Total
 
 
 
$
403

 
$
(41
)
 
$
(24
)
Interest Rate Agreements  
Derivative Instruments, Gain (Loss) [Line Items]  
Summary of the Gain (Loss) Recognized in the Statements of Operations
The following table provides a summary of the gain (loss) recognized in the Consolidated Statements of Operations from the de-designated portion of our New Rate Agreement:
Year ended December 31,
(dollars in thousands)
 
2014
 
2013
 
2012
Interest rate swap
 
$
140

 
$
(208
)
 
$
—

Related long-term debt
 
(589
)
 
—

 
—

Net impact
 
$
(449
)
 
$
(208
)
 
$
—


The following table provides a summary of the gain (loss) recognized in the Consolidated Statements of Operations from the designated portion of our rate Agreements:
Year ended December 31,
(dollars in thousands)
 
2014
 
2013
 
2012
Interest rate swap
 
$
497

 
$
1,732

 
$
147

Related long-term debt
 
(735
)
 
(2,164
)
 
3,635

Net impact
 
$
(238
)
 
$
(432
)
 
$
3,782



The gain or loss on the hedged long-term debt netted with the offsetting gain or loss on the related designated and de-designated interest rate swaps were recorded on the Consolidated Statements of Operations as follows:
Year ended December 31,
(dollars in thousands)
 
2014
 
2013
 
2012
Loss on redemption of debt
 
$
(757
)
 
$
—

 
$
3,502

Other income (expense)
 
70

 
(640
)
 
280

Net impact
 
$
(687
)
 
$
(640
)
 
$
3,782
Natural Gas Contracts  
Derivative Instruments, Gain (Loss) [Line Items]  
Summary of the Gain (Loss) Recognized in the Statements of Operations
The following table provides a summary of the gain (loss) recognized in other income (expense) in the Consolidated Statements of Operations from our natural gas contracts:
Year ended December 31,
(dollars in thousands)
 
2014
 
2013
 
2012
Designated contracts with ineffectiveness
 
$
—

 
$
(276
)
 
$
—

De-designated contracts
 
(1,236
)
 
—

 
—

Contracts where hedge accounting was not elected
 
(81
)
 
—

 
—

Total
 
$
(1,317
)
 
$
(276
)
 
$
—