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Income Taxes (Details 2) (Tax Valuation Allowance, USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Tax Valuation Allowance |  |  |
Changes in Valuation and Qualifying Accounts |  |  |
Balance at Beginning of Period | $ 184,817 | $ 130,548 | $ 66,395
Charged (Credited) to Operations | 0 | 0 | 0
Charged to Other Account | 8,006 | 54,269 | 64,153
Charges Utilized | 0 | 0 | 0
Balance at End of Period | $ 192,823 | $ 184,817 | $ 130,548

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