Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2017

Derivative Instruments, Gain (Loss) [Line Items]

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

As of June 30, 2017 and December 31, 2016, the fair value carrying amount of the Company's derivative instruments are recorded as follows (dollars in thousands):

		Asset / (Liability) Derivatives
	Balance Sheet Caption	June 30, 2017			December 31, 2016
Derivatives designated as hedging instruments
Interest rate swaps	Prepaid expenses and other current assets	$	160		$	160
Interest rate swaps	Accrued liabilities	(1,030		)	(870		)
Interest rate swaps	Other long-term liabilities	(3,240		)	(3,360		)
Total derivatives designated as hedging instruments		$	(4,110	)	$	(4,070	)

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

The following table summarizes the loss recognized in accumulated other comprehensive income or loss ("AOCI") as of June 30, 2017 and December 31, 2016, and the amounts reclassified from AOCI into earnings for the three and six months ended June 30, 2017 and 2016 (dollars in thousands):

	Amount of Loss Recognized in AOCI on Derivative (Effective Portion, net of tax)							Amount of Loss Reclassified from AOCI into Earnings
								Three months ended June 30,						Six months ended June 30,
	As of June 30, 2017			As of December 31, 2016			Location of Loss Reclassified from AOCI into Earnings (Effective Portion)	2017			2016			2017			2016
Derivatives designated as hedging instruments
Interest rate swaps	$	(2,540	)	$	(2,520	)	Interest expense	$	(90	)	$	(110	)	$	(340	)	$	(220	)

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 June 30, 2017 and December 31, 2016 are shown below (dollars in thousands):  

	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)
June 30, 2017	Interest rate swaps	Recurring	$	(4,110	)	$	—	$	(4,110	)	$	—
December 31, 2016	Interest rate swaps	Recurring	$	(4,070	)	$	—	$	(4,070	)	$	—