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Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Unrealized appreciation (depreciation) on available-for-sale securities, tax	$ 133	$ 410
Reclassification adjustment for realized gaines (losses), tax	$ 0	$ 73

Tax effect on the reclassification adjustment for losses realized upon the write-down of securities.

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.