Related Party Transactions Summary Of Approximate Values By Year Found Within Consolidated Statements Of Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Net premiums written	$ 138,588,877	$ 120,569,151	$ 111,909,473
Other income	17,575,071	12,470,338	10,875,443
Insurance Commissions	68,643,220	63,643,321	62,174,301
Title Insurance Agencies
Related Party Transaction [Line Items]
Net premiums written	14,355,000	15,016,000	14,015,000
Other income	2,240,000	2,317,000	2,618,000
Insurance Commissions	$ 9,864,000	$ 10,394,000	$ 9,700,000