Segment Information Selected Financial Information By Segment (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Insurance And Other Services Revenue	$ 156,163,948	$ 133,039,489	$ 122,784,916
Investment income	4,444,447	4,684,489	4,531,319
Net realized gain (loss) on investments	1,040,901	768,436	(116,163)
Total Revenues	161,649,296	138,492,414	127,200,072
Operating expenses	131,378,726	110,360,962	109,423,019
Income (loss) before income taxes	30,270,570	28,131,452	17,777,053
Total assets	248,912,859	228,938,122	211,522,029
Title Insurance
Segment Reporting Information [Line Items]
Insurance And Other Services Revenue	154,333,311	128,408,746	118,144,981
Investment income	4,992,127	4,329,605	4,073,857
Net realized gain (loss) on investments	931,635	644,850	(13,603)
Total Revenues	160,257,073	133,383,201	122,205,235
Operating expenses	129,095,939	105,885,770	104,594,829
Income (loss) before income taxes	31,161,134	27,497,431	17,610,406
Total assets	193,827,920	183,763,655	163,582,898
All Other
Segment Reporting Information [Line Items]
Insurance And Other Services Revenue	7,530,496	6,808,392	6,479,484
Investment income	546,105	564,891	574,132
Net realized gain (loss) on investments	109,266	123,586	(102,560)
Total Revenues	8,185,867	7,496,869	6,951,056
Operating expenses	7,912,962	6,583,157	6,598,055
Income (loss) before income taxes	272,905	913,712	353,001
Total assets	55,084,939	45,174,467	47,939,131
Intersegment Eliminations
Segment Reporting Information [Line Items]
Insurance And Other Services Revenue	(5,699,859)	(2,177,649)	(1,839,549)
Investment income	(1,093,785)	(210,007)	(116,670)
Net realized gain (loss) on investments	0	0	0
Total Revenues	(6,793,644)	(2,387,656)	(1,956,219)
Operating expenses	(5,630,175)	(2,107,965)	(1,769,865)
Income (loss) before income taxes	(1,163,469)	(279,691)	(186,354)
Total assets	$ 0	$ 0	$ 0