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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]
Reclassification adjustment for net gains realized in earnings, tax expense	$ 59
Unrealized gains (losses) related to factors other than credit, tax expense (benefit)		6
Reclassification adjustment for impairments realized in net income, tax benefit		10
Accretion of unrealized losses related to factors other than credit to investment securities held to maturity, tax benefit	$ 28	$ 18

Tax effect on the reclassification adjustment for gains or losses realized upon the sale of securities during the period.

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