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Federal, Foreign and State Current and Deferred Income Tax (Details) Net Operating Loss Carryforwards (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Ownership threshold under which companies file separate federal income tax return	80.00%
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	36.0
Federal foreign tax credit carryforwards, foreign	3.3
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	65.8

The tax effect as of the balance sheet date of the amount of future tax effects arising from unused foreign tax credit carryforwards which will decrease future taxable income if applied in future years; a tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.

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