Consolidated Statements Of Comprehensive Income (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 14,796,738	$ 11,190,907	$ 6,933,936
Other comprehensive income, before tax:
(Accretion) amortization related to prior year service cost	(1,518)	9,396	13,038
Amortization (accretion) of unrecognized loss (gain)	6,293	680	(318)
Accumulated postretirement benefit obligation adjustment	77,213	(82,918)	(115,089)
Unrealized gains on investments arising during the period	3,959,623	3,190,737	2,886,294
Reclassification adjustment for sale of securities included in net income	(229,869)	(1,166,179)	(353,950)
Reclassification adjustment for write-down of securities included in net income	34,070	99,940	325,391
Other	0	(36,600)	0
Other comprehensive income, before tax	3,845,812	2,015,056	2,755,366
Income tax expense (benefit) related to postretirement health benefits	27,887	(24,764)	(34,804)
Income tax expense related to unrealized gains on investments arising during the year	1,354,439	1,122,003	976,277
Income tax benefit related to reclassification adjustment for sale of securities included in net income	(78,622)	(426,017)	(122,594)
Income tax expense related to reclassification adjustment for write-down of securities included in net income	13,134	34,569	116,027
Net income tax expense on other comprehensive income	1,316,838	705,791	934,906
Other comprehensive income	2,528,974	1,309,265	1,820,460
Comprehensive Income	17,325,712	12,500,172	8,754,396
Less: Comprehensive income attributable to redeemable noncontrolling interest	(88,528)	(88,411)	0
Comprehensive Income Attributable to the Company	$ 17,237,184	$ 12,411,761	$ 8,754,396