Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Beginning balance at Dec. 31, 2012	$ 235,387	$ 400	$ 14,131	$ 157,305	$ 56,311	$ 7,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,645	0	0	0	3,645	0
Other comprehensive (loss) income	(2,646)	0	0	0	0	(2,646)
Dividends declared on preferred stock	(20)	0	0	0	(20)	0
Common stock issued under stock option plans, including tax benefit	19	0	2	17	0	0
Proceeds from issuance of common stock in connection with dividend reinvestment and stock purchase plan	42	0	1	41	0	0
Common stock share-based awards	96	0	0	96	0	0
Ending balance at Mar. 31, 2013	236,523	400	14,134	157,459	59,936	4,594
Beginning balance at Dec. 31, 2013	230,183	400	14,157	158,650	73,491	(16,515)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,944	0	0	0	4,944	0
Other comprehensive (loss) income	5,495	0	0	0	0	5,495
Dividends declared on preferred stock	(20)	0	0	0	(20)	0
Common stock issued under stock option plans, including tax benefit	119	0	9	110	0	0
Common stock issued under employee stock purchase plan	0	0	0	0	0	0
Proceeds from issuance of common stock in connection with dividend reinvestment and stock purchase plan	15	0	1	14	0	0
Common stock share-based awards	51	0	0	51	0	0
Ending balance at Mar. 31, 2014	$ 240,787	$ 400	$ 14,167	$ 158,825	$ 78,415	$ (11,020)