Income Taxes (Deferred Tax Valluation Allowances) (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Begining of Period		$ 35,462	$ 50,225
Deductions		(58,873)	(85,456)
Balance at End of Period	32,598	33,834	35,462
Additions Charged to Costs and Expenses		57,245	70,693
Deferred Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Begining of Period	72,767	78,109	59,179
Tax Expense and Revaluation	889	(5,342)	18,930
Deductions	0	0	0
Balance at End of Period	$ 73,656	$ 72,767	$ 78,109