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Preneed Trust Investments Preneed Trust Investments (Unrealized losses on cemetery merchandise and service trust investments) (Details) - Preneed Cemetery Trust Investments - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months $ 31,502 $ 12,806
Unrealized Losses, In Loss Position Less than12 months (5,469) (1,616)
Fair market value, In Loss Position Greater than12 months 6,346 12,361
Unrealized Losses, In Loss Position Greater than12 months (2,664) (1,933)
Fair market value, Total 37,848 25,167
Unrealized Losses, Total (8,133) (3,549)
Foreign debt    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 2,140 151
Unrealized Losses, In Loss Position Less than12 months (245) (6)
Fair market value, In Loss Position Greater than12 months 895 1,637
Unrealized Losses, In Loss Position Greater than12 months (266) (187)
Fair market value, Total 3,035 1,788
Unrealized Losses, Total (511) (193)
Corporate debt    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 9,918 3,735
Unrealized Losses, In Loss Position Less than12 months (813) (72)
Fair market value, In Loss Position Greater than12 months 443 846
Unrealized Losses, In Loss Position Greater than12 months (213) (201)
Fair market value, Total 10,361 4,581
Unrealized Losses, Total (1,026) (273)
Preferred stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 5,253 48
Unrealized Losses, In Loss Position Less than12 months (399) 0
Fair market value, In Loss Position Greater than12 months 3,767 8,109
Unrealized Losses, In Loss Position Greater than12 months (747) (588)
Fair market value, Total 9,020 8,157
Unrealized Losses, Total (1,146) (588)
Mortgage-backed securities    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 0 127
Unrealized Losses, In Loss Position Less than12 months 0 (15)
Fair market value, In Loss Position Greater than12 months 51 27
Unrealized Losses, In Loss Position Greater than12 months (14) (9)
Fair market value, Total 51 154
Unrealized Losses, Total (14) (24)
Common stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 14,191 8,249
Unrealized Losses, In Loss Position Less than12 months (4,012) (1,512)
Fair market value, In Loss Position Greater than12 months 1,190 1,742
Unrealized Losses, In Loss Position Greater than12 months (1,424) (948)
Fair market value, Total 15,381 9,991
Unrealized Losses, Total $ (5,436) (2,460)
Mutual Fund [Member]    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months   496
Unrealized Losses, In Loss Position Less than12 months   (11)
Fair market value, In Loss Position Greater than12 months   0
Unrealized Losses, In Loss Position Greater than12 months   0
Fair market value, Total   496
Unrealized Losses, Total   $ (11)