Statement of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance, beginning of year at Dec. 31, 2012	$ 79,654,628	$ 3,799	$ 44,337,743	$ 21,917,318	$ 9,664,466	$ 3,731,302
Issued during year	33,991	3	33,988	0	0	0
Treasury shares acquired and retired	(320,979)	(26)	(320,953)	0	0	0
Net income attributable to common shareholders	3,252,328	0	0	3,252,328	0	0
Unrealized holding income (loss) on securities net of noncontrolling and reclassification adjustment and taxes	(6,205,065)	0	0	0	(6,205,065)	0
Contributions	931,923	0	0	0	0	931,923
Distributions	(97,069)	0	0	0	0	(97,069)
Gain attributable to noncontrolling interest	617,684	0	0	0	0	617,684
Balance, end of period at Dec. 31, 2013	77,867,441	3,776	44,050,778	25,169,646	3,459,401	5,183,840
Issued during year	68,947	4	68,943	0	0	0
Treasury shares acquired and retired	(996,851)	(74)	(996,777)	0	0	0
Net income attributable to common shareholders	6,976,016	0	0	6,976,016	0	0
Unrealized holding income (loss) on securities net of noncontrolling and reclassification adjustment and taxes	3,394,573	0	0	0	3,394,573	0
Contributions	185,689	0	0	0	0	185,689
Distributions	(6,990,941)	0	0	0	0	(6,990,941)
Gain attributable to noncontrolling interest	3,067,726	0	0	0	0	3,067,726
Balance, end of period at Dec. 31, 2014	$ 83,572,600	$ 3,706	$ 43,122,944	$ 32,145,662	$ 6,853,974	$ 1,446,314