Consolidated Statements Of Shareholders’ Equity (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Balance	$ 104,914		$ 102,197
Comprehensive income:
Net income	3,508	3,915
Net income	4,006	3,780
Other comprehensive income, net	(498)	135
Preferred Stock [Member]
Balance		10		10
Common Stock [Member]
Balance	3,163	3,105	3,162	3,091
Comprehensive income:
Stock options exercised	1	12
Common stock issued		2
Additional Paid-in Capital [Member]
Balance	5,780	13,866	5,624	13,438
Comprehensive income:
Stock options exercised	16	247
Share-based compensation	140	120
Accretion of preferred stock discount		21
Common stock issued		40
Retained Earnings [Member]
Balance	91,753	78,969	88,695	76,167
Comprehensive income:
Net income	4,006
Net income		3,780
Accretion of preferred stock discount		(21)
Cash dividends paid – common stock ($0.29/$0.26 per share)	(948)	(832)
Cash dividends paid – preferred stock (5% per annum)		(125)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	4,218	3,519	4,716	3,384
Comprehensive income:
Other comprehensive income, net	(498)	135
Parent [Member]
Balance	104,914	99,469	102,197	96,090
Comprehensive income:
Net income	4,006
Net income		3,780
Other comprehensive income, net	(498)	135
Stock options exercised	17	259
Share-based compensation	140	120
Common stock issued		42
Cash dividends paid – common stock ($0.29/$0.26 per share)	(948)	(832)
Cash dividends paid – preferred stock (5% per annum)		$ (125)