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Income Taxes (Federal Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Federal statutory rate 35.00% 35.00% 35.00%
State income taxes, net (1.80%) (1.10%) 3.80%
Foreign tax rate differential 2.60% 0.00% 0.00%
Permanent differences 8.60% (6.30%) 0.00%
Valuation allowance (39.80%) (35.40%) (15.10%)
Net (increase) decrease in unrecognized tax benefits (1.70%) 3.70% 0.00%
Benefit from settlement of Tax Court litigation 6.40% 0.00% 0.00%
Other, net 0.60% 6.20% 0.30%
Effective tax rate 9.90% 2.10% 24.00%