SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 262,325	$ 174,856	$ 102,052
Charged to Costs and Expenses	232,797	264,888	238,376
Charged to Other Accounts	0	0	0
Deductions from Reserves	(199,441)	(177,419)	(165,572)
Balance at End of Period	295,681	262,325	174,856
Allowance for Trade Receivables
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	32,638	15,885	14,329
Charged to Costs and Expenses	174,314	172,622	153,652
Charged to Other Accounts	0	0	0
Deductions from Reserves	(166,799)	(155,869)	(152,096)
Balance at End of Period	40,153	32,638	15,885
Valuation Allowance of Net Deferred Taxes
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	207,055	147,223	87,159
Charged to Costs and Expenses	28,430	59,832	60,064
Charged to Other Accounts	0	0	0
Deductions from Reserves	0	0	0
Balance at End of Period	235,485	207,055	147,223
Inventory Obsolescence Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	22,632	11,748	564
Charged to Costs and Expenses	30,053	32,434	24,660
Charged to Other Accounts	0	0	0
Deductions from Reserves	(32,642)	(21,550)	(13,476)
Balance at End of Period	$ 20,043	$ 22,632	$ 11,748