Schedule II - Valuation and Qualifying Accounts (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance	$ 168,105	$ 149,847	$ 179,183	$ 209,757
Valuation Allowances and Reserves, Charged to Cost and Expense	(18,507)	(10,838)	(16,860)
Valuation Allowances and Reserves, Write-offs	(248)	(2,534)	(15,555)
Valuation Allowances and Reserves, Charged to Other Accounts	(1)	(15,964)	(1,841)
Valuation Allowances and Reserves, Balance	$ 168,105	$ 149,847	$ 179,183