Derivatives (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Assets and Liabilities at Fair Value [Table Text Block]

The following table provides the fair values of our derivative financial instruments for the periods presented:

	Asset Derivatives:
(dollars in thousands)	March 31, 2013			December 31, 2012
Derivatives designated as hedging instruments under FASB ASC 815:	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Interest rate contract	Derivative asset	$	—	Derivative asset	$	298
Natural gas contracts	Prepaid and other current assets	793			—
Total designated		793			298
Derivatives not designated as hedging instruments under FASB ASC 815:
Currency contracts	Prepaid and other current assets	292		Prepaid and other current assets	41
Total undesignated		292			41
Total		$	1,085		$	339
	Liability Derivatives:
(dollars in thousands)	March 31, 2013			December 31, 2012
Derivatives designated as hedging instruments under FASB ASC 815:	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Natural gas contracts		$	—	Derivative liability	$	420
Interest rate contract	Other long-term liabilities	58			—
Total designated		58			420
Total		$	58		$	420

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

The following table provides a summary of the effective portion of derivative gain (loss) reclassified from accumulated other comprehensive loss to the Condensed Consolidated Statements of Operations:

		Three months ended March 31,
(dollars in thousands)		2013			2012
Derivative:	Location:
Natural gas contracts	Cost of sales	$	(246	)	$	(1,460	)
Total impact on net income (loss)		$	(246	)	$	(1,460	)

The following table provides a summary of the gain (loss) recognized on the Condensed Consolidated Statements of Operations:

	Three months ended March 31,
(dollars in thousands)	2013			2012
Interest rate swap	$	(356	)	$	13
Related long-term debt	134			406
Net impact	$	(222	)	$	419

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

The following table provides a summary of the effective portion of derivative gain (loss) recognized in other comprehensive income (loss):

	Three months ended March 31,
(dollars in thousands)	2013		2012
Derivatives in Cash Flow Hedging relationships:
Natural gas contracts	$	967	$	(2,104	)
Total	$	967	$	(2,104	)

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

Gains (losses) for derivatives that were not designated as hedging instruments are recorded in current earnings as follows:

		Three months ended March 31,
(dollars in thousands)		2013		2012
Derivative:	Location:
Currency contracts	Other income (expense)	$	251	$	(162	)
Total		$	251	$	(162	)