Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions Charged to Cost and Expenses		$ (300)	$ (15,700)	$ (73,600)
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	51,501	59,113	51,920
Additions Charged to Cost and Expenses	[1]	9,906	8,050	14,508
Additions Charged to Other Accounts— Acquisitions and Related Adjustments	[1]	0	0	0
Deductions From Reserve	[1]	(7,995)	(15,662)	(7,315)
Balance at End of Year	[1]	53,412	51,501	59,113
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[2]	133,929	119,309	36,191
Additions Charged to Cost and Expenses	[2]	145,010	32,157	86,694
Additions Charged to Other Accounts— Acquisitions and Related Adjustments	[2]	1,832	(7,551)	2,595
Deductions From Reserve	[2]	(14,357)	(9,986)	(6,171)
Balance at End of Year	[2]	$ 266,414	$ 133,929	$ 119,309

[1] Deductions from reserve represent accounts written off and recoveries.

[2] Deductions from reserve represent accounts written off and recoveries.