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
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	$ 22,329	$ 19,083	$ 19,134
Additions/ (Deductions) Charged to/ (from) Expense	41,769	13,650	9,869
Other Charges/(Reversals)/Changes to Reserves	2,696	3,054	842
Write-offs/ Payments and Other Changes	(17,149)	(13,458)	(10,762)
Balance End of Period	49,645	22,329	19,083
Valuation Allowance on Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	17,585	56	1,122
Additions/ (Deductions) Charged to/ (from) Expense	6,853	13	0
Other Charges/(Reversals)/Changes to Reserves	(9,046)	17,516	(1,066)
Balance End of Period	$ 15,392	$ 17,585	$ 56