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Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net realized gain on investment $ 925,164 $ 92,082 $ 939,967 $ 584,219
Prior year service cost 1,098 555 2,195 1,109
Unrecognized loss (878) 0 (1,757) 0
Income before Income Taxes 5,786,497 4,679,044 8,155,621 6,035,559
Tax (1,666,000) (1,281,000) (2,309,000) (1,652,000)
Net Income 4,120,497 3,398,044 5,846,621 4,383,559
Reclassification Out Of Accumulated Other Comprehensive Income        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net Income 599,814 44,785 604,304 547,154
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized Gains And Losses On Available-For-Sale Securities        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net realized gain on investment 923,209 68,364 932,012 833,636
Other-than-temporary impairments (11,149) 0 (11,149) 0
Income before Income Taxes 912,060 68,364 920,863 833,636
Tax (310,942) (23,213) (313,951) (285,750)
Net Income 601,118 45,151 606,912 547,886
Reclassification Out Of Accumulated Other Comprehensive Income | Postretirement Benefits Plans        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Prior year service cost (1,098) (555) (2,195) (1,109)
Unrecognized loss (878) 0 (1,757) 0
Income before Income Taxes (1,976) (555) (3,952) (1,109)
Tax 672 189 1,344 377
Net Income $ (1,304) $ (366) $ (2,608) $ (732)