Fair Value Measurements - Goodwill and Asset Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment	$ 107,308	$ 49,266	$ 489,893
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	0	0	351,700
Property, plant and equipment and leasehold intangibles, net	29,300	27,200	78,000
Operating lease right-of-use assets	76,300	10,200	0
Investment in unconsolidated ventures	1,500	0	33,400
Assets held for sale	200	1,300	15,600
Other assets, net	0	10,600	11,200
Asset impairment	$ 107,300	$ 49,300	$ 489,900