Summary of Significant Accounting Policies - Summary of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Unrealized gain (loss) on AFS securities, Gross	$ 664,699	$ 1,396,698
Unrealized gain (loss) on AFS securities, Tax	(225,997)	(474,878)
Unrealized gain (loss) on AFS securities, Net	438,702	921,820
Unrealized gain (loss) on pension plan benefits, Gross	(1,680,224)	(2,098,116)
Unrealized gain (loss) on pension plan benefits, Tax	571,276	713,359
Unrealized gain (loss) on pension plan benefits, Net	(1,108,948)	(1,384,757)
Total accumulated other comprehensive income (loss)	$ (670,246)	$ (462,937)