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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Jun. 30, 2012
Income Taxes (Additional Textual) [Abstract]
Amount released as valuation allowance related to deferred tax assets of investments and capital loss carryovers	$ 1.4
Gross unrecognized tax benefits		16.4
Net unrecognized tax benefits		13.3
Domestic and foreign subsidiaries [Member]
Income Taxes (Textual) [Abstract]
Valuation allowance against domestic and foreign subsidiaries' deferred tax assets		$ 1.5

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

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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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