SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	$ 44,553	$ 23,545	$ 27,134
Charged to Costs and Expenses	19,132	36,720	(802)
Charged to Other Accounts	(58)	(288)	(52)
Deductions	(19,870)	(15,424)	(2,735)
Balance at End of Period	43,757	44,553	23,545
Inventory Valuation Reserve
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	46,813	45,141	6,801
Charged to Costs and Expenses	13,587	9,485	43,076
Deductions	(33,863)	(7,813)	(4,736)
Balance at End of Period	26,537	46,813	45,141
Valuation Allowance of Deferred Tax Assets
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	1,560,162	1,537,507	1,547,441
Charged to Other Accounts	247,566	22,655	(9,934)
Balance at End of Period	$ 1,807,728	$ 1,560,162	$ 1,537,507