Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Unrealized gains on securities available-for-sale
Unrealized holding gains arising during the year, income tax (expense) benefit	$ 496	$ 1,068	$ 954	$ 2,191
Reclassification Adjustment For Gain On Liquidation Of Equity Security Included In Securities Available For Sale Income Tax Expense	$ 24	$ 0	$ 71	$ 34