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Derivative Instruments and Hedging Activity - Consolidated statements of operations and other comprehensive loss (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Amount of Income/(Loss) Recognized in OCI on Derivative (Effective Portion)	$ (3,640)	$ 792	$ (7,199)	$ 2,712
Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Amount of Income/(Loss) Reclassified from Accumulated OCI into Expense (Effective Portion)	$ 157	$ (4)	$ 344	$ (91)

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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