Derivatives (Tables)

6 Months Ended

Jun. 30, 2014

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)	June 30, 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	$	182	Prepaid and other current assets	$	394
Natural gas contracts	Other assets	—		Other assets	19
Total designated		182			413
Total		$	182		$	413
	Liability Derivatives:
(dollars in thousands)	June 30, 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	Other long-term liabilities	$	76	Other long-term liabilities	$	—
Interest rate contract	Other long-term liabilities	—		Other long-term liabilities	1,866
Total designated		76			1,866
Derivatives not designated as hedging instruments under FASB ASC 815:
Currency contracts	Accrued Liabilities	187		Accrued Liabilities	—
Interest rate contract	Other long-term liabilities	—		Other long-term liabilities	207
Total undesignated		187			207
Total		$	263		$	2,073

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 June 30,				Six months ended June 30,
(dollars in thousands)		2014		2013		2014		2013
Derivative:	Location:
Natural gas contracts	Cost of sales	$	349	$	252	$	814	$	6
Total impact on net income (loss)		$	349	$	252	$	814	$	6

The following table provides a summary of the gain (loss) recognized on the Condensed Consolidated Statements of Operations from the de-designated portion of our Rate Agreement:

	Three months ended June 30,					Six months ended June 30,
(dollars in thousands)	2014			2013		2014			2013
Interest rate swap	$	40		$	—	$	140		$	—
Related long-term debt	(589		)	—		(589		)	—
Net impact	$	(549	)	$	—	$	(449	)	$	—

The following table provides a summary of the gain (loss) recognized on the Condensed Consolidated Statements of Operations from the designated portion of our Rate Agreement:

	Three months ended June 30,						Six months ended June 30,
(dollars in thousands)	2014			2013			2014			2013
Interest rate swap	$	168		$	(1,723	)	$	497		$	(2,079	)
Related long-term debt	(376		)	1,376			(735		)	1,510
Net impact	$	(208	)	$	(347	)	$	(238	)	$	(569	)

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 swap was recorded on the Condensed Consolidated Statements of Operations as follows:

	Three months ended June 30,						Six months ended June 30,
(dollars in thousands)	2014			2013			2014			2013
Loss on redemption of debt	$	(757	)	$	—		$	(757	)	$	—
Other income (expense)	—			(347		)	70			(569		)
Net impact	$	(757	)	$	(347	)	$	(687	)	$	(569	)

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 June 30,						Six months ended June 30,
(dollars in thousands)	2014			2013			2014		2013
Derivatives in Cash Flow Hedging relationships:
Natural gas contracts	$	(124	)	$	(377	)	$	506	$	590
Total	$	(124	)	$	(377	)	$	506	$	590

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

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

		Three months ended June 30,					Six months ended June 30,
(dollars in thousands)		2014			2013		2014			2013
Derivative:	Location:
Currency contracts	Other income (expense)	$	(187	)	$	166	$	(187	)	$	417
Total		$	(187	)	$	166	$	(187	)	$	417