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Preneed Activities Level 3 Activities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Document Fiscal Year Focus     2018  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Acquisition Related Investments Fair value of Level 3 $ 11,390 $ 0 $ 11,390 $ 0
Fair Value, Inputs, Level 3        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair market value, beginning balance 8,533 7,313 9,067 7,163
Net unrealized (losses) gains included in Accumulated other comprehensive income 264 660 (270) 810
Payments to Acquire Other Investments 7 28 7 28
Proceeds from Sale of Other Investments 0 77 0 77
Fair market value, ending balance $ 20,194 $ 7,924 $ 20,194 $ 7,924