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Preneed Activities Level 3 Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Sales $ 0 $ (2,900) $ 0
Other Investments [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Fair market value, beginning balance 9,755 9,067 7,163
Net realized losses included in Other income, net(2) (761) (697) 912
Purchases 1,006 66 1,945
Sales (1,782) (26) (953)
AcquisitionRelatedInvestmentsFairvalueofLevel3 0 1,345 0
Fair market value, ending balance $ 8,218 $ 9,755 $ 9,067