Consolidated Statements of Partners' Capital - 9 months ended Sep. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	General Partner [Member]	Common Unitholders, Units [Member]	Common Unitholders [Member]	Accumulated Other Comprehensive Income [Member]
Beginning balance at Dec. 31, 2016	$ 143,249	$ 3,061		$ 150,599	$ (10,411)
Beginning balance, units at Dec. 31, 2016			33,262
Partners' capital rollforward
Net income	(29,786)	(596)		(29,190)	0
Distributions	(26,152)	(507)		(25,645)	0
Equity compensation	$ 1,790	0		1,790	0
Vesting of phantom units (units)			213
Conversion of Stock, Shares Converted	1,582
Conversion of Stock, Amount Converted	$ 11,458		$ 11,458		0
Charges settled with common units, units issued	439
charges settled with common units, amount	$ 3,322		$ 3,322		0
Other comprehensive income (loss)	(644)	0		0	(644)
Ending balance at Sep. 30, 2017	102,994	$ 1,958		112,091	(11,055)
Ending balance, units at Sep. 30, 2017			35,496
Partners' capital rollforward
Partners' Capital, Other	$ (243)			$ (243)	$ 0