Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Summary of accumulated other comprehensive income balance [Abstract]
Unrealized gains on securities available for sale, opening balance	$ 8,184,871		$ 8,184,871		$ 7,987,055
Unrealized gains on securities available for sale, current period changes	96,290	2,426,874	197,816	2,766,538
Unrealized gains on securities available for sale, closing balance	8,184,871		8,184,871		7,987,055
Unrealized loss on pension plans and other benefit, opening balance			(9,428,433)
Unrealized loss on pension plans and other benefit plans	193,768	94,852	387,536	189,704
Unrealized loss on pension plans and other benefit, opening balance	(9,040,897)		(9,040,897)
Accumulated other comprehensive income (loss),opening balance	(856,026)		(856,026)		(1,441,378)
Total, current period changes	290,058	2,521,726	585,352	2,956,242
Total, Accumulated other comprehensive income. closing balance	$ (856,026)		$ (856,026)		$ (1,441,378)