Reserves for Claims Summary Of Transactions In Reserves For Claims (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period	$ 35,305,000	$ 37,788,000	$ 36,677,000
Provisions related to: Current year	7,431,586	6,673,036	7,295,013
Provisions related to: Prior years	(4,120,506)	(6,430,083)	(2,816,519)
Total provision charged to operations	3,311,080	242,953	4,478,494
Claims paid, net of recoveries, related to: Current year	(74,885)	(102,501)	(97,116)
Claims paid, net of recoveries, related to: Prior years	(3,740,195)	(2,623,452)	(3,270,378)
Total claims paid, net of recoveries	(3,815,080)	(2,725,953)	(3,367,494)
Balance, end of year	$ 34,801,000	$ 35,305,000	$ 37,788,000