CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Series A Redeemable Preferred Units	Series B Cumulative Convertible Preferred Units	Noncontrolling Interest	Common Units	Subordinated Units	Partners Equity Common Units	Partners Equity Common Units Series A Redeemable Preferred Units	Partners Equity Common Units Series B Cumulative Convertible Preferred Units	Partners Equity Subordinated Units	Partners Equity Subordinated Units Series A Redeemable Preferred Units	Partners Equity Subordinated Units Series B Cumulative Convertible Preferred Units
Balance at the beginning of the period, units at Dec. 31, 2016					95,721,000	95,164,000
Balance at the beginning of the period at Dec. 31, 2016	$ 671,646			$ 1,021			$ 489,023			$ 181,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable preferred units, units					201,000	263,000
Conversion of redeemable preferred units	6,624						2,868			3,756
Repurchases of units (in shares)					(446,000)	(39,000)
Repurchases of units	(8,185)						(7,893)			(292)
Issuance of common units for initial public offering, net of offering costs (in shares)					2,002,000
Issuance of common units, net of offering costs	32,458						32,458
Issuance of units for acquisitions (in shares)					4,348,000
Issuance of common units for property acquisitions	$ 71,723						71,723
Restricted units granted, net of forfeitures (in shares)	0				1,630,000
Equity-based compensation	$ 39,357						39,205			152
Distributions	(194,919)			(120)			(119,963)			(74,836)
Charges to partners' equity for accrued distribution equivalent rights	(2,694)						(2,694)
Net income (loss)	157,153			(34)			101,891			55,296
Distributions on redeemable preferred units		$ (3,117)	$ (1,925)					$ (1,577)	$ (1,925)		$ (1,540)	$ 0
Balance at the end of the period, units at Dec. 31, 2017					103,456,000	95,388,000
Balance at the end of the period at Dec. 31, 2017	768,121			867			603,116			164,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable preferred units, units					736,000	964,000
Conversion of redeemable preferred units	24,248						10,498			13,750
Repurchases of units (in shares)					(623,000)	(23,000)
Repurchases of units	(11,221)						(10,879)			(342)
Issuance of common units for initial public offering, net of offering costs (in shares)					2,244,000
Issuance of common units, net of offering costs	40,537						40,537
Issuance of units for acquisitions (in shares)					1,234,000
Issuance of common units for property acquisitions	$ 22,657						22,657
Restricted units granted, net of forfeitures (in shares)	0				1,316,000
Equity-based compensation	$ 40,952						40,733			219
Distributions	(250,162)			(211)			(141,777)			(108,174)
Charges to partners' equity for accrued distribution equivalent rights	(3,698)						(3,698)
Net income (loss)	295,560			24			175,675			119,861
Distributions on redeemable preferred units		$ (25)	$ (21,000)					$ (13)	$ (21,000)		$ (12)
Purchase of noncontrolling interests	(1,706)			(680)			(1,026)
Balance at the end of the period, units at Dec. 31, 2018					108,363,000	96,329,000
Balance at the end of the period at Dec. 31, 2018	904,263			0			714,823			189,440
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable preferred units, units					96,329,000	(96,329,000)
Conversion of redeemable preferred units	0						142,149			(142,149)
Repurchases of units (in shares)					(966,000)
Repurchases of units	(16,287)						(16,287)
Issuance of common units, net of offering costs	(43)						(43)
Issuance of units for acquisitions (in shares)					57,000
Issuance of common units for property acquisitions	$ 943						943
Restricted units granted, net of forfeitures (in shares)	0				2,177,000
Equity-based compensation	$ 23,490						23,490
Distributions	(304,439)						(233,155)			(71,284)
Charges to partners' equity for accrued distribution equivalent rights	(2,852)						(2,852)
Net income (loss)	214,368						190,375			23,993
Distributions on redeemable preferred units	(21,000)						(21,000)
Balance at the end of the period, units at Dec. 31, 2019					205,960,000	0
Balance at the end of the period at Dec. 31, 2019	$ 798,443			$ 0			$ 798,443			$ 0