Condensed Consolidated Statements of Partners' Capital (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Limited Partner Common Interest [Member]	Non-controlling Interests [Member]	Accumulated Other Comprehensive Income [Member]
Partners' capital, beginning balance at Dec. 31, 2016	$ 366,426	$ 282,228	$ 81,541	$ 2,657
Net income	9,555	5,835	3,720
Other comprehensive income (loss)	1,156			1,156
Unit-based compensation	1,847	1,847
Net settlement of withholding taxes related to unit-based compensation	(202)	(202)
Contributions	1,575		1,575
Distribution equivalent rights paid on unissued units	(529)	(529)
Distributions	(32,958)	(25,758)	(7,200)
Partners' capital, ending balance at Sep. 30, 2017	$ 346,870	$ 263,421	$ 79,636	$ 3,813