CONSOLIDATED STATEMENT OF EQUITY - 6 months ended Jun. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Noncontrolling interests	Common Units	Subordinated Units	Partners' equity— common units	Partners' equity— subordinated units
Beginning balance (in shares) at Dec. 31, 2016			95,721	95,164
Beginning balance at Dec. 31, 2016	$ 671,646	$ 1,021			$ 489,023	$ 181,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted units granted, net of forfeitures (in shares)			1,565	0
Equity-based compensation	20,666				21,045	(379)
Conversion of redeemable preferred units (in shares)			201	263
Conversion of redeemable preferred units	6,624				2,868	3,756
Repurchases of common and subordinated units (in shares)			(427)	(39)
Repurchases of common and subordinated units	(7,845)				(7,553)	(292)
Issuance of units for property acquisitions (in shares)			3,434
Issuance of units for property acquisitions	56,447				56,447
Distributions	(91,085)	(66)			(56,008)	(35,011)
Charges to partners' equity for accrued distribution equivalent rights	(613)				(613)
Net income (loss)	115,757	(7)			68,520	47,244
Issuance of common units, net of offering costs (in shares)			65
Issuance of common units, net of offering costs	991				991
Distributions on redeemable preferred units	(1,786)				(903)	(883)
Ending balance (in shares) at Jun. 30, 2017			100,559	95,388
Ending balance at Jun. 30, 2017	$ 770,802	$ 948			$ 573,817	$ 196,037