SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	$ 19,083	$ 19,134	$ 19,443
Additions/ (Deductions) Charged to/ (from) Expense	13,650	9,869	4,823
Other Charges/(Reversals)/Changes to Reserves	3,054	842	322
Write-offs/ Payments and Other Changes	(13,458)	(10,762)	(5,454)
Balance End of Period	22,329	19,083	19,134
Valuation Allowance on Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	56	1,122	3,340
Additions/ (Deductions) Charged to/ (from) Expense	13	0	(1,451)
Other Charges/(Reversals)/Changes to Reserves	17,516	(1,066)	(767)
Balance End of Period	$ 17,585	$ 56	$ 1,122