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Preneed Activities Investments Classified by Contractual Maturity Date (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Investments Classified By Contractual Maturity Date [Line Items]  
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value $ 54,629
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 57,445
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 9,680
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 371
Available-for-sale Securities, Debt Maturities, Total, Fair Value $ 122,125