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Related Party Transactions Summary Of Approximate Values By Year Found Within Consolidated Statements Of Income (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]      
Net premiums written $ 122,095,381 $ 112,475,686 $ 109,963,556
Other income 10,944,108 10,309,230 8,627,935
Insurance Commissions 63,643,321 62,174,301 65,632,353
Title Insurance Agencies      
Related Party Transaction [Line Items]      
Net premiums written 15,016,000 14,015,000 11,783,000
Other income 2,317,000 2,618,000 2,043,000
Insurance Commissions $ 10,394,000 $ 9,700,000 $ 8,049,000