Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other comprehensive income, net of tax:
Unrealized holding gains arising during the period, tax	$ 389	$ 1,828	$ 748	$ 2,093
Reclassification adjustment for gains included in net income, tax	50	30	98	42
Unrealized gain on interest rate swap, tax	$ 72	$ 54	$ 45	$ 33