Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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

As of March 31, 2013 and December 31, 2012, the fair value carrying amount of the Company's interest rate swaps are recorded as follows:

		Asset Derivatives				Liability Derivatives
	Balance Sheet Caption	March 31, 2013		December 31, 2012		March 31, 2013		December 31, 2012
		(dollars in thousands)
Derivatives designated as hedging instruments
Interest rate swap	Long-term asset	$	420	$	—	$	—	$	—
Interest rate swap	Accrued liabilities	—		—		690		530
Interest rate swap	Other long-term liabilities	—		—		—		690
Total derivatives designated as hedging instruments		$	420	$	—	$	690	$	1,220

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

three months ended March 31, 2013 and 2012:

	Amount of Loss Recognized in AOCI on Derivative (Effective Portion, net of tax)							Amount of Loss Reclassified from AOCI into Earnings
								Three months ended March 31,
	As of March 31, 2013			As of December 31, 2012			Location of Loss Reclassified from AOCI into Earnings (Effective Portion)	2013			2012
	(dollars in thousands)							(dollars in thousands)
Derivatives designated as hedging instruments
Interest rate swaps	$	(170	)	$	(760	)	Interest expense	$	(10	)	$	—

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location

	Amount of Loss Recognized in Earnings on Derivatives
	Three months ended March 31,					Location of Loss Recognized in Earnings on Derivatives
	2013			2012
	(dollars in thousands)
Derivatives not designated as hedging instruments
Interest rate swaps	$	(80	)	$	—	Interest expense

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 March 31, 2013 are shown below.  

		March 31, 2013
Description	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)
Interest rate swaps	Recurring	$	(270	)	$	—	$	(270	)	$	—