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Reserves for Claims Summary Of Transactions In Reserves For Claims (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Balance, beginning of period $ 34,801 $ 35,305 $ 37,788
Provisions related to: Current year 6,762 7,432 6,673
Provisions related to: Prior years (7,094) (4,121) (6,430)
Total (benefit) provision charged to operations (332) 3,311 243
Claims paid, net of recoveries, related to: Current year (178) (75) (103)
Claims paid, net of recoveries, related to: Prior years (2,562) (3,740) (2,623)
Total claims paid, net of recoveries (2,740) (3,815) (2,726)
Balance, end of year $ 31,729 $ 34,801 $ 35,305