Fair Value Measurements - Goodwill and Asset Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating lease right-of-use assets	$ 6,600		$ 72,300
Goodwill and asset impairment	10,290	$ 3,769	88,516	$ 4,160	$ 88,516	$ 4,160
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant and equipment and leasehold intangibles, net	3,700	1,200	14,700	1,200
Operating lease right-of-use assets	6,600	0	72,300	0
Investment in unconsolidated ventures	0	0	1,500	0
Other intangible assets, net	0	2,600	0	2,600
Other assets, net	0	0	0	400
Goodwill and asset impairment	$ 10,300	$ 3,800	$ 88,500	$ 4,200