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Reserves For Claims Summary Of Transactions In Reserves For Claims (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Liability for Title Claims and Claims Adjustment Expense $ 34,141,000 $ 35,305,000 $ 37,788,000
Provision, charged to operations 860,224 242,953  
Payments of claims, net of recoveries $ (2,024,224) $ (2,725,953)