XML 89 R79.htm IDEA: XBRL DOCUMENT v3.10.0.1
Cemetery Perpetual Care Trust Investments Cemetery Perpetual Care Trust Investments (Narrative) (Details)
9 Months Ended
Sep. 30, 2018
USD ($)
Schedule of Available-for-sale Securities [Line Items]  
Fair value measurements, transfers between Level 1 and Level 2 $ 0