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Schedule V - Valuation and Qualifying Accounts (Details) - Valuation Allowance on Mortgage Loans [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning balance $ (14,142) $ (22,633) $ (26,047)
Charged to costs and expenses (4,846) 1,018 (6,052)
Translation adjustment 0 0 0
Write-offs/payments/other 10,561 7,473 9,466
Ending balance $ (8,427) $ (14,142) $ (22,633)