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Receivables from Preneed Trusts Receivables from Preneed Trusts (Composition of Asset Held in Trusts) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Historical Cost Basis    
Investment Holdings [Line Items]    
Assets Held-in-trust $ 18,581 $ 17,601
Historical Cost Basis | Cash and Cash Equivalents    
Investment Holdings [Line Items]    
Assets Held-in-trust 4,533 4,172
Historical Cost Basis | Fixed Income Investments    
Investment Holdings [Line Items]    
Assets Held-in-trust 11,603 10,668
Historical Cost Basis | Mutual Funds And Common Stocks    
Investment Holdings [Line Items]    
Assets Held-in-trust 2,440 2,755
Historical Cost Basis | Annuities    
Investment Holdings [Line Items]    
Assets Held-in-trust 5 6
Fair Value    
Investment Holdings [Line Items]    
Assets Held-in-trust 18,659 17,555
Fair Value | Cash and Cash Equivalents    
Investment Holdings [Line Items]    
Assets Held-in-trust 4,533 4,172
Fair Value | Fixed Income Investments    
Investment Holdings [Line Items]    
Assets Held-in-trust 11,603 10,668
Fair Value | Mutual Funds And Common Stocks    
Investment Holdings [Line Items]    
Assets Held-in-trust 2,518 2,709
Fair Value | Annuities    
Investment Holdings [Line Items]    
Assets Held-in-trust $ 5 $ 6