Preferred Units - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 28, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Class of Stock [Line Items]
Proceeds from issuance of Series B cumulative convertible preferred units, net of offering costs		$ 0	$ 0	$ 293,469
Temporary equity attributable to parent		$ 298,361	$ 298,361		$ 298,361	$ 298,361	$ 298,361	$ 298,361	$ 298,361	$ 300,644
Preferred Units
Class of Stock [Line Items]
Partners' equity, preferred units, outstanding (in units)		0
Preferred units distribution rate (percent)		10.00%
Adjusted conversion price (in dollars per share)		$ 14.2683
Number of preferred units redeemed (in shares)			2,115	19,704
Amount of preferred stock redeemed			$ 2,100	$ 20,200
Number of preferred units converted (in shares)			24,248	6,624
Conversion of preferred units to common units			$ 24,200	$ 6,600
Common Units
Class of Stock [Line Items]
Convertible preferred units conversion ratio		30.3431
Conversion of preferred units (in units)			735,758	200,996
Number of shares issued (in shares)		0	2,243,775	2,001,823
Subordinated Units
Class of Stock [Line Items]
Convertible preferred units conversion ratio		39.7427
Conversion of preferred units (in units)			963,681	263,247
Series B Cumulative Convertible Preferred Units
Class of Stock [Line Items]
Preferred units distribution rate (percent)		7.00%
Shares, price per share (in dollars per share)	$ 20.3926
Proceeds from issuance of Series B cumulative convertible preferred units, net of offering costs	$ 300,000
Minimum underlying value for conversion trigger		$ 10,000
Temporary equity attributable to parent		298,361	$ 298,361
Accrued distributions		$ 5,300	$ 5,300
Series B Cumulative Convertible Preferred Units | Noble Acquisition
Class of Stock [Line Items]
Number of shares issued (in shares)	14,711,219
Proceeds from issuance of Series B cumulative convertible preferred units, net of offering costs	$ 300,000