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Segment Information (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Policy acquisition expenses amortized $ 96,732 $ 98,919 $ 93,817
Income tax expense (benefit) 30,467 35,970 41,870
Property and Casualty [Member]      
Policy acquisition expenses amortized 74,950 73,173 71,327
Income tax expense (benefit) 4,627 11,274 13,944
Retirement [Member]      
Policy acquisition expenses amortized 14,635 18,155 14,781
Income tax expense (benefit) 20,334 19,873 21,319
Life [Member]      
Policy acquisition expenses amortized 7,147 7,591 7,709
Income tax expense (benefit) 9,775 7,951 9,432
Corporate and Other [Member]      
Income tax expense (benefit) $ (4,269) $ (3,128) $ (2,825)