Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	General Partner [Member]	Common Unitholders [Member]	Subordinated Unitholder [Member]	Accumulated Other Comprehensive Income [Member]
Partners' capital rollforward
Common units issued and outstanding			9,266,000
Subordinated units issued and outstanding				6,274,000
Net Income (Loss) Allocated to General Partners	$ 351
Beginning balance at Dec. 31, 2012	182,250	$ 3,346	$ 108,943	$ 68,957	$ 1,004
Partners' capital rollforward
Net income	17,567	351	10,251	6,965	0
Distributions	(26,969)	(539)	(15,766)	(10,664)	0
Equity compensation	1,459	0	1,459	0	0
Vesting of Phantom Units	0	0	$ 0	0	0
Vesting of Phantom Units, number of units			13,000
Other comprehensive income (loss)	(591)	0	$ 0	0	(591)
Ending balance at Dec. 31, 2013	173,716	3,158	$ 104,887	$ 65,258	413
Partners' capital rollforward
Net Income (Loss) Allocated to Limited Partners	10,251
Common units issued and outstanding			9,279,000
Subordinated units issued and outstanding				6,274,000
Net Income (Loss) Allocated to General Partners	510
Net income	11,258	510	$ 7,319	$ 3,429	0
Distributions	$ (36,687)	$ (732)	$ (27,579)	$ (8,376)	$ 0
Conversion of subordinated units to common units	0	0	60,311,000	(60,311,000)	0
Conversion of units, number of units			6,274,000	(6,274,000)
Proceeds from issuance of common units, net of issuance costs	$ 395,794	$ 0	$ 395,794	$ 0	$ 0
Proceeds from issuance of common units, number of units			17,572,000
Contribution of capital	8,405	8,405	$ 0	0	0
Equity compensation	1,544	$ 0	1,544	$ 0	0
Vesting of Phantom Units	0		0		0
Other comprehensive income (loss)	(3,749)	$ 0	0	$ 0	(3,749)
Ending balance at Dec. 31, 2014	550,281	11,341	$ 542,276	$ 0	(3,336)
Partners' capital rollforward
Net Income (Loss) Allocated to Limited Partners	$ 7,319
Common units issued and outstanding	33,142,114		33,142,000
Subordinated units issued and outstanding	6,273,970			0
Net Income (Loss) Allocated to General Partners		(1,892)
Net income	$ (146,630)			$ 0	0
Distributions	(68,360)	(2,607)	$ (65,753)	0	0
Equity compensation	1,924	0	1,924	0	0
Vesting of Phantom Units	0	0	$ 0	0	0
Vesting of Phantom Units, number of units			44,000
Other comprehensive income (loss)	(5,057)	0	$ 0	0	(5,057)
Ending balance at Dec. 31, 2015	$ 332,158	$ 6,842	333,709	$ 0	$ (8,393)
Partners' capital rollforward
Net Income (Loss) Allocated to Limited Partners			$ (144,738)
Common units issued and outstanding	33,186,155		33,186,000
Subordinated units issued and outstanding	0			0