DEBT Fair Values of Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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

The following provides information regarding the Partnership’s assets and liabilities related to its interest rate swap agreements as of the periods indicated (in thousands):

Derivatives Not Designated as Hedging Instruments	Balance Sheet Location	Fair Value of Derivatives
		December 31, 2017		June 30, 2018
Interest rate swap assets - current	Other current assets	$	68	$	157
Interest rate swap liabilities - noncurrent	Long-term interest rate swap liabilities	$	225	$	—

Changes in the fair value of the interest rate swaps are reflected in the unaudited condensed consolidated statements of operations as follows (in thousands):

Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized in Net Income on Derivatives	Amount of Gain (Loss) Recognized in Net Income on Derivatives
		Three Months ended June 30,					Six Months ended June 30,
		2017		2018			2017		2018
Interest rate swaps	Interest expense, net of capitalized interest	$	223	$	(40	)	$	975	$	314