Income and Partnership Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Current federal	$ (61,726)	$ 22,745	$ 2,682
Current state and local	(3,747)	6,261	4,901
Current foreign	(32,987)	5,759	4,301
Total current	(98,460)	34,765	11,884
Deferred federal, state and local	(43,220)	(5,953)	15,525
Deferred foreign	1,287	1,847	(4,266)
Total deferred	(41,933)	(4,106)	11,259
Total (benefit) provision for income taxes	$ (140,393)	$ 30,659	$ 23,143