CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Noncontrolling interests	Common Units	Subordinated Units	Partners' equity — common units	Partners' equity — subordinated units	Series B cumulative convertible preferred units on an as-converted basis	Series B cumulative convertible preferred units on an as-converted basis Partners' equity — common units	Series A redeemable preferred units on an as-converted basis	Series A redeemable preferred units on an as-converted basis Partners' equity — common units	Series A redeemable preferred units on an as-converted basis Partners' equity — subordinated units
Beginning balance (in shares) at Dec. 31, 2017				103,456	95,388
Beginning balance at Dec. 31, 2017		$ 768,121	$ 867			$ 603,116	$ 164,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common and subordinated units (in shares)				(451)	(23)
Repurchases of common and subordinated units		(8,441)				(8,099)	(342)
Issuance of common units, net of offering costs (in shares)				8
Issuance of common units, net of offering costs		138				138
Restricted units granted, net of forfeitures, units				1,177
Equity–based compensation		18,294				18,075	219
Distributions		(52,545)	(52)			(32,581)	(19,912)
Charges to partners' equity for accrued distribution equivalent rights		(661)				(661)
Distributions on preferred units								$ (5,250)	$ (5,250)	$ (25)	$ (13)	$ (12)
Net income (loss)		41,957	27			29,592	12,338
Conversion of subordinated units ( in shares)				736	964
Conversion of subordinated units		24,248				10,498	13,750
Ending balance (in shares) at Mar. 31, 2018				104,926	96,329
Ending balance at Mar. 31, 2018		785,836	842			614,815	170,179
Beginning balance (in shares) at Dec. 31, 2017				103,456	95,388
Beginning balance at Dec. 31, 2017		768,121	867			603,116	164,138
Ending balance (in shares) at Dec. 31, 2018				108,363	96,329
Ending balance at Dec. 31, 2018		904,263				714,823	189,440
Beginning balance (in shares) at Mar. 31, 2018				104,926	96,329
Beginning balance at Mar. 31, 2018		785,836	842			614,815	170,179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common and subordinated units (in shares)				(35)
Repurchases of common and subordinated units		(630)				(630)
Issuance of common units, net of offering costs (in shares)				509
Issuance of common units, net of offering costs		8,929				8,929
Restricted units granted, net of forfeitures, units				94
Equity–based compensation	[1]	8,521				8,521
Distributions		(53,182)	(62)			(33,011)	(20,109)
Charges to partners' equity for accrued distribution equivalent rights		(643)				(643)
Distributions on preferred units								(5,250)	(5,250)
Net income (loss)		28,690	(49)			22,798	5,941
Ending balance (in shares) at Jun. 30, 2018				105,494	96,329
Ending balance at Jun. 30, 2018		772,271	$ 731			615,529	156,011
Beginning balance (in shares) at Dec. 31, 2018				108,363	96,329
Beginning balance at Dec. 31, 2018		904,263				714,823	189,440
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common and subordinated units (in shares)				(588)
Repurchases of common and subordinated units		(10,110)				(10,110)
Issuance of common units, net of offering costs		(43)				(43)
Issuance of common units for property acquisitions (in shares)				57
Issuance of common units for property acquisitions		943				943
Restricted units granted, net of forfeitures, units				1,545
Equity–based compensation		13,669				13,669
Distributions		(75,917)				(40,275)	(35,642)
Charges to partners' equity for accrued distribution equivalent rights		(1,044)				(1,044)
Distributions on preferred units								(5,250)	(5,250)
Net income (loss)		9,017				7,155	1,862
Ending balance (in shares) at Mar. 31, 2019				109,377	96,329
Ending balance at Mar. 31, 2019		835,528				679,868	155,660
Beginning balance (in shares) at Dec. 31, 2018				108,363	96,329
Beginning balance at Dec. 31, 2018		904,263				714,823	189,440
Ending balance (in shares) at Jun. 30, 2019				205,956	0
Ending balance at Jun. 30, 2019		845,654				845,654	0
Beginning balance (in shares) at Mar. 31, 2019				109,377	96,329
Beginning balance at Mar. 31, 2019		835,528				679,868	155,660
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common and subordinated units (in shares)				(377)
Repurchases of common and subordinated units		(6,164)				(6,164)
Restricted units granted, net of forfeitures, units				627
Equity–based compensation		3,332				3,332
Distributions		(76,113)				(40,471)	(35,642)
Charges to partners' equity for accrued distribution equivalent rights		(766)				(766)
Distributions on preferred units								$ (5,250)	$ (5,250)
Net income (loss)		95,087				72,956	22,131
Conversion of subordinated units ( in shares)				96,329	(96,329)
Conversion of subordinated units						142,149	(142,149)
Ending balance (in shares) at Jun. 30, 2019				205,956	0
Ending balance at Jun. 30, 2019		$ 845,654				$ 845,654	$ 0

[1] The change in Partners' equity for equity-based compensation during the six-month period ended June 30, 2018 was incorrectly allocated between Partners' equity - common units and Partners' equity - subordinated units in the Partnership's prior reports. The Partnership concluded that this error was not material to any of the prior reporting periods. As such, the revision for this correction has been made to the prior periods presented.