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Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net realized gain (loss) on investment $ 439,326 $ (338,631) $ 574,328 $ 601,336
Prior year service cost 0 1,098 0 3,293
Unrecognized loss (2,235) (878) (6,705) (2,635)
Income before Income Taxes 11,378,167 6,436,498 20,503,675 14,592,119
Tax (3,249,000) (1,941,000) (6,040,000) (4,250,000)
Net Income 8,129,167 4,495,498 14,463,675 10,342,119
Reclassification Out Of Accumulated Other Comprehensive Income        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net Income 280,985 (132,155) 358,502 472,149
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 (loss) on investment 545,925 458,058 785,517 1,390,070
Other-than-temporary impairments (118,703) (657,755) (233,941) (668,904)
Income before Income Taxes 427,222 (199,697) 551,576 721,166
Tax (144,761) 68,846 (188,648) (245,105)
Net Income 282,461 (130,851) 362,928 476,061
Reclassification Out Of Accumulated Other Comprehensive Income | Postretirement Benefits Plans        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Prior year service cost 0 (1,098) 0 (3,293)
Unrecognized loss (2,235) (878) (6,705) (2,635)
Income before Income Taxes (2,235) (1,976) (6,705) (5,928)
Tax 759 672 2,279 2,016
Net Income $ (1,476) $ (1,304) $ (4,426) $ (3,912)