Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
		Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Additions Charged to Cost and Expenses				$ 73,600	$ 14,200	$ 11,600
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]		$ 43,935	51,920	43,935	25,469
Additions Charged to Cost and Expenses	[1]			14,508	12,045	19,624
Additions Charged to Other Accounts— Acquisitions and Related Adjustments	[1]			0	0	151
Deductions From Reserve	[1]			(7,315)	(4,060)	(1,309)
Balance at End of Year	[1]			59,113	51,920	43,935
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[2]		24,725	36,191	24,725	15,378
Additions Charged to Cost and Expenses	[2]			86,694	12,883	18,548
Additions Charged to Other Accounts— Acquisitions and Related Adjustments	[2]			2,595	(67)	(3,596)
Deductions From Reserve	[2]			(6,171)	(1,350)	(5,605)
Balance at End of Year	[2]			$ 119,309	$ 36,191	$ 24,725
Selling, General and Administrative Expenses | VENEZUELA
Movement in Valuation Allowances and Reserves [Roll Forward]
Probable Accounts Receivables		$ 73,500	$ 73,500

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

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