Accumulated Other Comprehensive Income Balances Of Each Component Of Accumulated Other Comprehensive Income, Net Of Tax (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 8,818,430	$ 7,509,165	$ 5,688,705
Other comprehensive income before reclassifications	2,656,145	1,977,408	1,834,058
Amounts reclassified from accumulated other comprehensive income	(127,171)	(668,143)	(13,598)
Other comprehensive income	2,528,974	1,309,265	1,820,460
Ending balance	11,347,404	8,818,430	7,509,165
Unrealized Gains And Losses On Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	8,920,884	7,563,541	5,675,516
Other comprehensive income before reclassifications	2,605,184	2,032,134	1,910,017
Amounts reclassified from accumulated other comprehensive income	(130,311)	(674,791)	(21,992)
Other comprehensive income	2,474,873	1,357,343	1,888,025
Ending balance	11,395,757	8,920,884	7,563,541
Postretirement Benefits Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(102,454)	(54,376)	13,189
Other comprehensive income before reclassifications	50,961	(54,726)	(75,959)
Amounts reclassified from accumulated other comprehensive income	3,140	6,648	8,394
Other comprehensive income	54,101	(48,078)	(67,565)
Ending balance	$ (48,353)	$ (102,454)	$ (54,376)