Condensed Consolidated Statements of Partners' Capital and Noncontrolling Interests (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Noncontrolling Interests	General Partners	Limited Partners
Beginning balance (in units) at Dec. 31, 2017	4,311,065
Beginning balance at Dec. 31, 2017	$ 240,626	$ 176,079	$ 1,028	$ 63,519
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	10,992	2,430	119	8,443
Cash distributions	(20,808)	(11,217)	(133)	(9,458)
Capital call	$ 92,280	92,280
Equity-based compensation (in units)	16,178
Equity-based compensation	$ 924		13	911
Units issued under distribution reinvestment plan (in units)	1,808
Units issued under distribution reinvestment plan	$ 128			128
Unit repurchases (in units)	(13,422)
Unit repurchases	$ (939)			(939)
Payroll taxes paid on unit net settlements (in units)	(1,466)
Payroll taxes paid on unit net settlements	$ (102)		(1)	(101)
Ending balance (in units) at Sep. 30, 2018	4,314,163
Ending balance at Sep. 30, 2018	$ 323,101	$ 259,572	$ 1,026	$ 62,503