Consolidated Statements Of Comprehensive Income - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 4,466,180	$ 1,804,461
Other comprehensive income, before tax:
Amortization of unrecognized loss	2,153	2,235
Unrealized gains on investments arising during the period	1,666,147	1,212,525
Reclassification adjustment for sales of securities included in net income	(90,506)	(186,079)
Reclassification adjustment for write-downs of securities included in net income	0	42,794
Other comprehensive income, before tax	1,577,794	1,071,475
Income tax expense related to postretirement health benefits	731	760
Income tax expense related to unrealized gains on investments arising during the period	568,956	419,586
Income tax benefit related to reclassification adjustment for sales of securities included in net income	(31,565)	(64,860)
Income tax expense related to reclassification adjustment for write-downs of securities included in net income	0	14,668
Net income tax expense on other comprehensive income	538,122	370,154
Other comprehensive income	1,039,672	701,321
Comprehensive Income	5,505,852	2,505,782
Comprehensive loss attributable to noncontrolling interests	9,875	9,579
Comprehensive Income Attributable to the Company	$ 5,515,727	$ 2,515,361