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Preneed Cemetery Receivables (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Preneed Cemetery Receivables [Abstract]    
Term of sales contract for cemetery interment rights, maximum (in years) 5 years  
Unearned Finance Charges Included In Receivables $ 5.7 $ 5.7
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%