CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other comprehensive income:
Net unrealized gain (loss) on available-for-sale securities, taxes	$ 391	$ 556	$ 2,452	$ 787
Net realized gain on sale of available-for-sale securities included in net income, taxes	20	145	256	300
Change in nonqualified pension plan unrecognized net loss and unrecognized prior service cost, taxes	$ 5	$ 4	$ 14	$ 12