SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	$ 26,368	$ 16,173	$ 15,046
Additions Charged to Operating Expense	2,408	15,817	7,901
Deductions from Reserves	6,283	5,622	6,774
Balance End of Period	22,493	26,368	16,173
Revenue Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	17,947	11,626	14,203
Additions Charged to Operating Expense	35,549	41,338	24,862
Deductions from Reserves	37,278	35,017	27,439
Balance End of Period	16,218	17,947	11,626
Valuation Allowance on Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	79,295	68,355	55,189
Additions Charged to Operating Expense	4,459	10,466	9,052
Deductions from Reserves	(111)	474	4,114
Balance End of Period	$ 83,643	$ 79,295	$ 68,355