Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]    
Foreign effective tax rate, foreign operations 25.00%  
Gross deferred tax asset   $ 92,251
Net deferred tax asset   73,747
Net operating loss carryforwards for U.S. federal income tax purposes   217,822
Tax windfall   725
Research and experimentation credit carryforwards   1,693
Alternative minimum tax credit carryforwards   261
AMT percentage   20.00%
Maximum percentage of income offset by available NOLs   90.00%
Net operating loss carryforwards, net of limitations   217,097
Amount of net operating loss carryforwards that do not expire until 2020 or later   $ 215,538