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Cemetery Perpetual Care Trust Investments (Purchases and sales of investments in perpetual care trusts) (Details) - Perpetual Care Trust Invesments [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Purchases $ (5,012) $ (6,758)
Sales $ 3,887 $ 4,748