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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Market Valuation, Tax Expense [Abstract]
Market valuation (expense) benefit	$ 1,020	$ (3,552)

- Definition

Tax effect of the gross appreciation or the gross loss, net of reclassification adjustment, in the value of the total unsold available-for-sale securities at the end of an accounting period.

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