Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 10,920	$ 11,506	$ 11,845	$ 11,677	$ 12,006	$ 12,536	$ 12,472	$ 12,335	$ 45,948	$ 49,349	$ 51,372
Total interest expense	1,732	1,843	1,912	2,022	2,274	2,477	2,636	2,721	7,509	10,108	12,764
Net Interest Income	9,188	9,663	9,933	9,655	9,732	10,059	9,836	9,614	38,439	39,241	38,608
Provision for loan losses	1,800	1,875	1,667	1,900	2,808	2,100	3,345	2,100	7,242	10,353	10,225
Net interest income after provision for loan losses	7,388	7,788	8,266	7,755	6,924	7,959	6,491	7,514	31,197	28,888	28,383
Noninterest income	3,376	2,953	2,543	2,875	2,998	2,542	2,804	3,071	11,747	11,415	13,777
Noninterest expense	8,634	8,678	9,047	8,544	8,104	8,329	8,522	9,189	34,903	34,144	35,569
Income tax expense (benefit)	491	538	324	581	329	500	61	266	1,934	1,156	1,226
Net income	1,639	1,525	1,438	1,505	1,489	1,672	712	1,130	6,107	5,003	5,365
Preferred stock dividends and accretion	310	319	318	319	320	319	318	319	1,266	1,276	1,276
Net Income Available to Common Shareholders	$ 1,329	$ 1,206	$ 1,120	$ 1,186	$ 1,169	$ 1,353	$ 394	$ 811	$ 4,841	$ 3,727	$ 4,089
Basic Earnings Per Common Share	$ 0.17	$ 0.15	$ 0.14	$ 0.15	$ 0.15	$ 0.17	$ 0.05	$ 0.10	$ 0.61	$ 0.47	$ 0.55
Diluted Earnings Per Common Share	$ 0.17	$ 0.15	$ 0.14	$ 0.15	$ 0.15	$ 0.17	$ 0.05	$ 0.10	$ 0.61	$ 0.47	$ 0.55
Dividends declared per common share (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.04	$ 0.04	$ 0.04