Consolidated Statements Of Comprehensive Income (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 9,672,498	$ 14,796,738	$ 11,190,907
Other comprehensive income, before tax:
Amortization (accretion) related to prior year service cost	2,217	(1,518)	9,396
Amortization of unrecognized loss	0	6,293	680
Accumulated postretirement (benefit) provision obligation adjustment	(47,121)	77,213	(82,918)
Unrealized gains on investments arising during the period	2,848,256	3,959,623	3,190,737
Reclassification adjustment for sale of securities included in net income	(518,279)	(229,869)	(1,166,179)
Reclassification adjustment for write-down of securities included in net income	14,542	34,070	99,940
Other	0	0	(36,600)
Other comprehensive income, before tax	2,299,615	3,845,812	2,015,056
Income tax (benefit) expense related to postretirement health benefits	(15,269)	27,887	(24,764)
Income tax expense related to unrealized gains on investments arising during the year	974,145	1,354,439	1,122,003
Income tax benefit related to reclassification adjustment for sale of securities included in net income	(173,403)	(78,622)	(426,017)
Income tax expense related to reclassification adjustment for write-down of securities included in net income	5,037	13,134	34,569
Net income tax expense on other comprehensive income	790,510	1,316,838	705,791
Other comprehensive income	1,509,105	2,528,974	1,309,265
Comprehensive Income	11,181,603	17,325,712	12,500,172
Less: Comprehensive income attributable to redeemable noncontrolling interest	(23,523)	(88,528)	(88,411)
Comprehensive Income Attributable to the Company	$ 11,158,080	$ 17,237,184	$ 12,411,761