Net (Loss) Income Per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net (loss) income from continuing operations	$ (36,459)	$ 19,762
Net (income) loss attributable to noncontrolling interests in consolidated entities (continuing operations)	(130)	56
Income (Loss) from Continuing Operations Available to Common Unitholders	(36,589)	19,818
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(25,148)	(4,140)
Net (loss) income attributable to common unitholders	(61,737)	15,678
Interest expense form SPLP Preferred Units	0	2,973
Net (loss) income attributable to common unitholders – assuming dilution	$ (61,737)	$ 18,651
Net (loss) income per common unit – basic
Net (loss) income from continuing operations (in dollars per share)	$ (1.46)	$ 0.80
Net loss from discontinued operations (in dollars per share)	(1.01)	(0.17)
Net (loss) income attributable to common unitholders (in dollar per share)	(2.47)	0.63
Net (loss) income per common unit – diluted
Net (loss) income from continuing operations (in dollars per share)	(1.46)	0.58
Net loss from discontinued operations (in dollars per share)	(1.01)	(0.10)
Net (loss) income attributable to common unitholders (in dollars per share)	$ (2.47)	$ 0.48
Denominator for net income (loss) per common unit - basic (in shares)	25,020,854	24,846,653
Effect of dilutive securities:
Unvested restricted common units (in shares)	0	379
SPLP Preferred Units (in shares)	0	14,329,877
Denominator for net income per common unit - diluted (in shares)	25,020,854	39,176,909
Preferred Units
Effect of dilutive securities:
Antidilutive units excluded from computation of earnings per share (in shares)	32,104,497
Restricted Stock Units (RSUs)
Effect of dilutive securities:
Antidilutive units excluded from computation of earnings per share (in shares)	32,933