Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 113,357	$ 27,862	$ 22,379
Charged to Cost and Expenses	287,427	139,274	21,983
Charge-off Against Allowances	(233,373)	(53,779)	(16,500)
Valuation Allowances and Reserves, Balance, Ending Balance	$ 167,411	$ 113,357	$ 27,862