CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2011	$ 273,200	$ 87,380	$ 181,903	$ 5,139	$ (1,222)
Net income	17,445		17,445
Other comprehensive income (loss), net of tax	1,352			1,352
Common stock cash dividends declared	(5,302)		(5,302)
Treasury shares purchased under deferred directors' plan	0	186			(186)
Stock activity under stock compensation plans, net of taxes	185	185
Stock compensation expense	689	689
Balance at Jun. 30, 2012	287,569	88,440	194,046	6,491	(1,408)
Balance at Dec. 31, 2012	297,739	90,039	203,654	5,689	(1,643)
Net income	18,482		18,482
Other comprehensive income (loss), net of tax	(6,314)			(6,314)
Common stock cash dividends declared	(3,134)		(3,134)
Treasury shares purchased under deferred directors' plan	0	190			(190)
Treasury stock sold and distributed under deferred directors' plan	0	(54)			54
Stock activity under stock compensation plans, net of taxes	18	18
Stock compensation expense	728	728
Balance at Jun. 30, 2013	$ 307,519	$ 90,921	$ 219,002	$ (625)	$ (1,779)