CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Stockholders' Equity, Balance at Dec. 31, 2010	$ 246,997	$ 85,766	$ 161,299	$ 1,350	$ (1,418)
Comprehensive income:
Net Income	5,965		5,965
Other comprehensive income (loss), net of tax	69			69
Comprehensive income	6,034
Common stock cash dividends declared, per share	(2,510)		(2,510)
Treasury shares purchased under deferred directors' plan	0	103			(103)
Stock activity under stock compensation plans	266	266
Stock compensation expense	266	266
Stockholders' Equity, Balance at Mar. 31, 2011	251,053	86,401	164,754	1,419	(1,521)
Stockholders' Equity, Balance at Dec. 31, 2011	273,200	87,380	181,903	5,139	(1,222)
Comprehensive income:
Net Income	8,626		8,626
Other comprehensive income (loss), net of tax	1,102			1,102
Comprehensive income	9,728
Common stock cash dividends declared, per share	(2,515)		(2,515)
Treasury shares purchased under deferred directors' plan	0	172			(172)
Stock activity under stock compensation plans	30	30
Stock compensation expense	428	428
Stockholders' Equity, Balance at Mar. 31, 2012	$ 280,871	$ 88,010	$ 188,014	$ 6,241	$ (1,394)