Income Taxes (Deferred Tax Valluation Allowances) (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance [Line Items]
Balance at Begining of Period	$ 35,462	$ 50,225	$ 70,181
Deductions	58,873	85,456	93,151
Balance at End of Period	33,834	35,462	50,225
Additions Charged to Costs and Expenses	57,245	70,693	73,195
Deferred Tax Valuation Allowance [Member]
Valuation Allowance [Line Items]
Balance at Begining of Period	78,109	59,179	41,359
Tax Expense and Revaluation	(5,342)	18,930	17,820
Deductions	0	0	0
Balance at End of Period	$ 72,767	$ 78,109	$ 59,179