CONDENSED 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 holding gains on securities:
Unrealized holding gains arising during the period, tax	$ 295	$ 488	$ 861	$ 1,198
Reclassification adjustment due to gains realized on sales of securities, tax	$ 0	$ 71	$ 0	$ 253