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Preneed Trust Investments (Cost and fair market values associated with preneed cemetery trust investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Preneed Cemetery Trust Investments [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost $ 71,783 $ 71,306
Unrealized Gains 5,426 7,535
Unrealized Losses (5,512) (3,549)
Fair Market Value 71,697 75,292
Preneed cemetery trust investments $ 72,450 $ 75,992
Fair market value as a percentage of cost 99.90% 105.60%
Preneed Cemetery Trust Investments [Member] | Mortgage Backed Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost   $ 1,018
Unrealized Gains   249
Unrealized Losses   (24)
Fair Market Value   1,243
Preneed Cemetery Trust Investments [Member] | Accrued Investment Income [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost $ 753 700
Fair Market Value 753 700
Preneed Funeral Trust Investments [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 94,031 88,638
Unrealized Gains 5,384 7,574
Unrealized Losses (5,566) (3,610)
Fair Market Value 93,849 92,602
Preneed cemetery trust investments $ 94,603 $ 93,341
Fair market value as a percentage of cost 99.80% 104.50%
Preneed Funeral Trust Investments [Member] | Accrued Investment Income [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost $ 754 $ 739
Fair Market Value 754 739
Fair Value, Inputs, Level 1 [Member] | Preneed Cemetery Trust Investments [Member] | Cash and money market accounts [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 7,366 3,132
Unrealized Gains 0 0
Unrealized Losses 0 0
Fair Market Value 7,366 3,132
Fair Value, Inputs, Level 1 [Member] | Preneed Cemetery Trust Investments [Member] | Common Stock [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 25,216 26,465
Unrealized Gains 4,074 5,250
Unrealized Losses (3,783) (2,460)
Fair Market Value 25,507 29,255
Fair Value, Inputs, Level 1 [Member] | Preneed Funeral Trust Investments [Member] | Cash and money market accounts [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 24,381 14,349
Unrealized Gains 0 0
Unrealized Losses 0 0
Fair Market Value 24,381 14,349
Fair Value, Inputs, Level 1 [Member] | Preneed Funeral Trust Investments [Member] | Common Stock [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 24,674 26,129
Unrealized Gains 4,033 5,253
Unrealized Losses (3,751) (2,468)
Fair Market Value 24,956 28,914
Fair Value, Inputs, Level 2 [Member] | Preneed Cemetery Trust Investments [Member] | Foreign Government Debt Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 4,848 4,834
Unrealized Gains 193 292
Unrealized Losses (244) (193)
Fair Market Value 4,797 4,933
Fair Value, Inputs, Level 2 [Member] | Preneed Cemetery Trust Investments [Member] | Corporate Debt [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 15,665 18,238
Unrealized Gains 733 1,184
Unrealized Losses (665) (273)
Fair Market Value 15,733 19,149
Fair Value, Inputs, Level 2 [Member] | Preneed Cemetery Trust Investments [Member] | Preferred Stock [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 16,471 16,421
Unrealized Gains 118 510
Unrealized Losses (751) (588)
Fair Market Value 15,838 16,343
Fair Value, Inputs, Level 2 [Member] | Preneed Cemetery Trust Investments [Member] | Mortgage Backed Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 1,015  
Unrealized Gains 281  
Unrealized Losses (26)  
Fair Market Value 1,270  
Fair Value, Inputs, Level 2 [Member] | Preneed Cemetery Trust Investments [Member] | Fixed Income [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 1,202 1,198
Unrealized Gains 27 50
Unrealized Losses (43) (11)
Fair Market Value 1,186 1,237
Fair Value, Inputs, Level 2 [Member] | Preneed Funeral Trust Investments [Member] | Foreign Government Debt Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 4,833 4,870
Unrealized Gains 195 298
Unrealized Losses (238) (189)
Fair Market Value 4,790 4,979
Fair Value, Inputs, Level 2 [Member] | Preneed Funeral Trust Investments [Member] | Corporate Debt [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 16,034 18,963
Unrealized Gains 718 1,197
Unrealized Losses (676) (278)
Fair Market Value 16,076 19,882
Fair Value, Inputs, Level 2 [Member] | Preneed Funeral Trust Investments [Member] | Preferred Stock [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 16,211 16,335
Unrealized Gains 110 501
Unrealized Losses (741) (585)
Fair Market Value 15,580 16,251
Fair Value, Inputs, Level 2 [Member] | Preneed Funeral Trust Investments [Member] | Mortgage Backed Securities [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Cost 1,163 1,187
Unrealized Gains 293 263
Unrealized Losses (29) (27)
Fair Market Value $ 1,427 $ 1,423