EARNINGS PER UNIT (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of earnings per limited partner unit

The following table details the components of EPU.

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018			2017
	(In thousands, except per-unit amounts)
Numerator for basic and diluted EPU:
Allocation of net income (loss) among limited partner     interests:
Net income (loss) attributable to limited partners	$	54,151	$	89,547	$	(2,948	)	$	95,576
Less net income attributable to Series A Preferred Units		7,125		—		21,375			—
Net income (loss) attributable to common limited partners	$	47,026	$	89,547	$	(24,323	)	$	95,576
Denominator for basic and diluted EPU:
Weighted-average common units outstanding – basic		73,356		73,059		73,283			72,583
Effect of nonvested phantom units		400		374		—			318
Weighted-average common units outstanding – diluted		73,756		73,433		73,283			72,901
Earnings (loss) per limited partner unit:
Common unit – basic	$	0.64	$	1.23	$	(0.33	)	$	1.32
Common unit – diluted	$	0.64	$	1.22	$	(0.33	)	$	1.31
Nonvested anti-dilutive phantom units excluded from the     calculation of diluted EPU		1		—		2			55