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
Other comprehensive income, net of tax:
Unrealized holding gains arising during the period, tax	$ 673	$ 942	$ 1,422	$ 3,035
Reclassification adjustment for gains included in net income, tax	56	47	154	89
Unrealized gain on interest rate swap, tax	$ 18	$ 169	$ 63	$ 202