Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

As of December 31, 2014 and 2013, the fair value carrying amount of the Company's derivatives designated as hedging instruments are recorded as follows:

		Asset / (Liability) Derivatives
	Balance Sheet Caption	December 31, 2014			December 31, 2013
		(dollars in thousands)
Derivatives designated as hedging instruments
Interest rate swap	Other assets	$	1,270		$	2,080
Interest rate swap	Accrued liabilities	(180		)	(360		)
Foreign currency forward contracts	Accrued liabilities	(150		)	—
Total derivatives designated as hedging instruments		$	940		$	1,720

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

The following tables summarize the income (loss) recognized in accumulated other comprehensive income ("AOCI"), the amounts reclassified from AOCI into earnings and the amounts recognized directly into earnings as of December 31, 2014 and 2013 and for the years ended December 31, 2014, 2013 and 2012:

	Amount of Income (Loss) Recognized in AOCI on Derivative (Effective Portion, net of tax)					Location of Income (Loss) Reclassified from AOCI into Earnings (Effective Portion)	Amount of Income (Loss) Reclassified from AOCI into Earnings
	As of December 31,						Year ended December 31,
	2014			2013			2014			2013		2012
	(dollars in thousands)						(dollars in thousands)
Derivatives designated as hedging instruments
Interest rate swap	$	680		$	1,060	Interest expense	$	(970	)	$	2,510	$	(250	)
Foreign currency forward contracts	$	(70	)	$	—	Cost of sales	$	170		$	—	$	—

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

		Amount of Loss Recognized in Earnings on Derivatives
		Year ended December 31,
	Location of Loss Recognized in Earnings on Derivatives	2014		2013			2012
		(dollars in thousands)
Derivatives not designated as hedging instruments
Interest rate swaps	Interest expense	$	—	$	(1,480	)	$	(80	)

Fair Value Measurements, Recurring and Nonrecurring

Fair value measurements and the fair value hierarchy level for the Company's assets and liabilities measured at fair value on a recurring basis as of December 31, 2014 and 2013 are shown below.

	Frequency	Asset / (Liability)			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
		(dollars in thousands)
December 31, 2014
Interest rate swap	Recurring	$	1,090		$	—	$	1,090		$	—
Foreign currency forward contracts	Recurring	$	(150	)	$	—	$	(150	)	$	—
December 31, 2013
Interest rate swap	Recurring	$	1,720		$	—	$	1,720		$	—