Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

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Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax (Textual) [Abstract]      
Net deferred tax liability $ 878,357 $ 869,850  
Amortized period of license 15 years    
Net operating loss carryforwards 7,844,000    
Uncertain state tax positions in other long term liabilities 1,524 942 0
Accrued for interest and penalties $ 0 $ 0