Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal net operating loss	$ 118.0
U.S. Capital losses	7.5
Forgein income tax credits	29.2
Cumulative U.S. state net operating losses	88.6
Change in valuation allowance	$ 10.3

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

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