Condensed Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	General Partner Units [Member]	Limited Partner [Member]
Balance at Dec. 31, 2014	$ 234,142	$ 1,328	$ 232,814
Balance, Units at Dec. 31, 2014			29,166
Increase (Decrease) in Partners' Capital [Roll Forward]
Equity-based compensation	1,944		1,944
Equity-based compensation, Units			490
Offering costs	(87)		(87)
Distributions	(3,752)	(45)	(3,707)
Net income (loss)	(4,112)	(50)	(4,062)
Balance at Mar. 31, 2015	$ 228,135	$ 1,233	$ 226,902
Balance, Units at Mar. 31, 2015			29,656