SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS - Deferred Tax Asset Valuation Allowance (Details) - Deferred Tax Asset Valuation Allowance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	$ 944,576	$ 655,658	$ 327,623
Charges to Costs, Expenses and other	109,285	314,098	356,583
Reversal	(49,577)	(457)	(230)
Adjustments	(13,062)	(24,723)	(28,318)
Balance at End of Period	$ 991,222	$ 944,576	$ 655,658