Consolidated Statement Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Series A 3% Preferred Stock [Member] Retained Earnings [Member]	Series A 3% Preferred Stock [Member]	Series B-1 8.48% Preferred Stock [Member] Retained Earnings [Member]	Series B-1 8.48% Preferred Stock [Member]	Preferred Equity [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2011					$ 17,473	$ 142	$ 67,247	$ 158,079	$ 945	$ (6,692)	$ 237,194
Comprehensive income:
Net income								6,196			6,196
Other comprehensive loss, net of tax									(1,052)		(1,052)
Comprehensive income											5,144
Purchases of common stock for treasury										(525)	(525)
Share-based compensation plans:
Share-based compensation							142				142
Stock options exercised							(5)			31	26
Restricted stock awards issued, net							(721)			721
Excess tax benefit on share-based compensation							130				130
Cash dividends declared:
Preferred stock dividends	(1)	(1)	(368)	(368)							(369)
Common- dividend per share								(1,780)			(1,780)
Balance at Mar. 31, 2012					17,473	142	66,793	162,126	(107)	(6,465)	239,962
Balance at Dec. 31, 2012					17,471	142	67,710	172,244	3,253	(6,923)	253,897
Comprehensive income:
Net income								6,149			6,149
Other comprehensive loss, net of tax									(2,116)		(2,116)
Comprehensive income											4,033
Purchases of common stock for treasury										(229)	(229)
Repurchase of Series B-1 8.48% preferred stock					(52)		(1)				(53)
Share-based compensation plans:
Share-based compensation							102				102
Stock options exercised							(2)			15	13
Restricted stock awards issued, net							(496)			496
Excess tax benefit on share-based compensation							6				6
Cash dividends declared:
Preferred stock dividends	(1)	(1)	(367)	(367)							(368)
Common- dividend per share								(2,471)			(2,471)
Balance at Mar. 31, 2013					$ 17,419	$ 142	$ 67,319	$ 175,554	$ 1,137	$ (6,641)	$ 254,930