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Preneed Cemetery Receivables (Narrative) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Term of sales contract for cemetery interment rights, maximum (in Duration) 5 years  
Past due notifications starting date (in Days) 15 days  
Accounts receivable allowance percentage on contracts past due 120 days or more (in Percent) 100.00%  
Number of days past due contractual payments are when they are provided for with a one hundred percent allowance (in Days) 90 days  
Percent of total receivables which are 120 days or more past due (in Percent) 4.90% 4.90%
Cemetery    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unearned finance charges associated with receivables $ 4.7 $ 5.7