CONSOLIDATED STATEMENTS OF RETAINED EARNINGS (USD $) In Thousands, 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
Balance at Beginning of Period				$ 46,669				$ 43,603	$ 46,669	$ 43,603	$ 41,785
Net Income	1,593	5,974	4,163	1,910	1,828	3,734	3,470	2,268	13,640	11,300	9,798
Dividends Declared:
Cumulative Preferred, Class A, $0.20 per share									38	38	38
Common Stock - 2012 $0.2375 per share; 2011 $0.2325 per share									8,467	8,196	7,942
Total Dividends Declared									8,505	8,234	7,980
Balance at End of Period	51,804				46,669				51,804	46,669	43,603
Series A Voting
Dividends Declared:
Cumulative Preferred, Class A, $0.20 per share									12	12	12
Cumulative Preferred Stock
Dividends Declared:
Cumulative Preferred, Class A, $0.20 per share									$ 26	$ 26	$ 26