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Preneed Activities Level 3 Activities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Document Fiscal Year Focus     2018  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Acquisition Related Investments Fair value of Level 3 $ (2,287) $ 0 $ 9,103 $ 0
Fair Value, Inputs, Level 3        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair market value, beginning balance 20,194 7,924 9,067 7,163
Net unrealized (losses) gains included in Accumulated other comprehensive income 1,020 (116) 750 694
Payments to Acquire Other Investments 36 1,881 43 1,909
Proceeds from Sale of Other Investments 9 854 9 931
Fair market value, ending balance $ 18,954 $ 8,835 $ 18,954 $ 8,835