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Income Taxes (Provision for Income Taxes) (Narrative) (Details) (State and Local Jurisdiction [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
State and Local Jurisdiction [Member]
Tax credit carryforwards available for state tax purposes	$ 5.1
Net operating loss carryforwards available for state purposes	$ 3.0
State operating loss carryforwards expiration years	2021 to 2027

- Definition

The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

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