SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - Deferred Tax Assets - 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]
Balance at Beginning of Period	$ 351,408	$ 262,392	$ 201,422
(Deductions) Additions Charged to Costs and Expenses	84,260	98,311	70,063
Additions Charged to Other Accounts	1,114	0	0
Deductions	(13,338)	(9,295)	(9,093)
Balance at End of Period	$ 423,444	$ 351,408	$ 262,392