CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at Dec. 31, 2011	$ 87,380	$ 181,903	$ 5,139	$ (1,222)	$ 273,200
Net income		8,626			8,626
Other comprehensive income (loss), net of tax			1,102		1,102
Common stock cash dividends declared		(2,515)			(2,515)
Treasury shares purchased under deferred directors' plan	172			(172)	0
Stock activity under stock compensation plans, net of taxes	30				30
Stock compensation expense	428				428
Balance at Mar. 31, 2012	88,010	188,014	6,241	(1,394)	280,871
Balance at Dec. 31, 2012	90,039	203,654	5,689	(1,643)	297,739
Net income		9,246			9,246
Other comprehensive income (loss), net of tax			(701)		(701)
Treasury shares purchased under deferred directors' plan	173			(173)	0
Treasury stock sold and distributed under deferred directors' plan	(54)			54	0
Stock activity under stock compensation plans, net of taxes	(138)				(138)
Stock compensation expense	439				439
Balance at Mar. 31, 2013	$ 90,459	$ 212,900	$ 4,988	$ (1,762)	$ 306,585