Partners' Capital - Net Income Per Unit (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Schedule of Reconciliation of Net Income from Continuing and Discontinuing Operations [Line Items]
Loss from continuing operations	$ (10,614)	$ (9,453)	[1]	$ (15,372)	$ (1,504)	[1],[2]
Less pre-acquisition (income) allocated to the general partner	0	(2,720)	[1]	0	(4,938)	[1]
Income (loss) from discontinued operations	(180,568)	4,927	[1]	(179,466)	12,014	[1],[2]
Less general partner’s interest in net income (loss):
Less loss allocable to unvested restricted units	65	6	[1]	67	(2)	[1]
Limited partners’ interest in net income (loss)	$ (187,293)	$ (7,095)	[1],[3]	$ (190,874)	$ 5,459	[1],[3]
Basic weighted average limited partner units outstanding (in shares)	38,871,420	38,722,037	[3]	38,912,250	38,828,845	[3]
Dilutive effect of restricted units issued (in shares)	0	0		0	5,576
Total weighted average limited partner diluted units outstanding (in shares)	38,871,420	38,722,037	[3]	38,912,250	38,834,421	[3]
Continuing operations
Less general partner’s interest in net income (loss):
Distributions payable on behalf of general partner interest	$ 11	$ 819		$ 31	$ (112)
General partner interest in undistributed loss	(223)	(1,122)		(338)	96
Less loss allocable to unvested restricted units	(4)	(13)		(5)	0
Limited partners’ interest in net income (loss)	(10,398)	(11,857)		(15,060)	(6,426)
Discontinued operations
Less general partner’s interest in net income (loss):
Distributions payable on behalf of general partner interest	185	(427)		362	896
General partner interest in undistributed loss	(3,797)	585		(3,952)	(769)
Less loss allocable to unvested restricted units	(61)	7		(62)	2
Limited partners’ interest in net income (loss)	$ (176,895)	$ 4,762		$ (175,814)	$ 11,885

[1] Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

[2] Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.

[3] Financial information for 2018 has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 1 – Nature of Operations and Basis of Presentation.