CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' EQUITY - USD ($) $ in Thousands	Limited Partner Interest Series A Preferred Limited Partners	Limited Partner Interest Common Limited Partners	General Partner, Global GP LLC	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Total
Balance, beginning of period at Dec. 31, 2016		$ 401,044	$ (2,948)	$ (5,441)	$ 5,186	$ 397,841
Increase (Decrease) in Partners' Capital
Net income (loss)		58,358	394		(1,635)	57,117
Noncontrolling interest capital contribution					279	279
Distributions to partners		(62,892)	(424)			(63,316)
Distribution to noncontrolling interest					(465)	(465)
Unit-based compensation		2,755				2,755
Other comprehensive income				(27)		(27)
LTIP units withheld for tax obligations		(522)				(522)
Dividends on repurchased units		656				656
Balance, end of period at Dec. 31, 2017		399,399	(2,978)	(5,468)	3,365	394,318
Increase (Decrease) in Partners' Capital
Issuance of units	$ 66,366					66,366
Net income (loss)	2,691	100,181	1,033		(1,502)	102,403
Distributions to partners	(1,831)	(63,744)	(564)			(66,139)
Unit-based compensation		2,738				2,738
Other comprehensive income				208		208
LTIP units withheld for tax obligations		(835)				(835)
Dividends on repurchased units		135				135
Balance, end of period at Dec. 31, 2018	67,226	437,874	(2,509)	(5,260)	1,863	499,194
Increase (Decrease) in Partners' Capital
Net income (loss)	6,728	27,760	1,379		(689)	35,178
Distributions to partners	(6,728)	(69,522)	(1,490)			(77,740)
Unit-based compensation		1,966				1,966
Other comprehensive income				184		184
LTIP units withheld for tax obligations		(657)				(657)
Dividends on repurchased units		1,114				1,114
Balance, end of period at Dec. 31, 2019	$ 67,226	$ 398,535	$ (2,620)	$ (5,076)	$ 1,174	$ 459,239