Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Other Adjustments	$ 1,025	$ (31)
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	257,728	162,588	$ 138,910
Other Adjustments	(62,791)	(4,913)	3,873
Additions Charged to Cost and Expense	40,402	100,053	19,805
Balance at End of Period Noncurrent	$ 235,339	$ 257,728	$ 162,588