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Cemetery Perpetual Care Trust Investments Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Investments - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months $ 8,247 $ 21,221
Unrealized Losses, In Loss Position Less than12 months (885) (3,612)
Fair market value, In Loss Position Greater than12 months 7,089 4,492
Unrealized Losses, In Loss Position Greater than12 months (2,020) (1,727)
Fair market value, Total 15,336 25,713
Unrealized Losses, Total (2,905) (5,339)
Corporate debt    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 168 1,619
Unrealized Losses, In Loss Position Less than12 months (26) (189)
Fair market value, In Loss Position Greater than12 months 549 639
Unrealized Losses, In Loss Position Greater than12 months (149) (196)
Fair market value, Total 717 2,258
Unrealized Losses, Total (175) (385)
Preferred stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 1,057 7,006
Unrealized Losses, In Loss Position Less than12 months (196) (587)
Fair market value, In Loss Position Greater than12 months 3,253 301
Unrealized Losses, In Loss Position Greater than12 months (338) (143)
Fair market value, Total 4,310 7,307
Unrealized Losses, Total (534) (730)
Preferred stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months   3,586
Unrealized Losses, In Loss Position Less than12 months   (279)
Fair market value, In Loss Position Greater than12 months   2,787
Unrealized Losses, In Loss Position Greater than12 months   (541)
Fair market value, Total   6,373
Unrealized Losses, Total   (820)
Mortgage-backed securities    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 2,989  
Unrealized Losses, In Loss Position Less than12 months (106)  
Fair market value, In Loss Position Greater than12 months 0  
Unrealized Losses, In Loss Position Greater than12 months 0  
Fair market value, Total 2,989  
Unrealized Losses, Total (106)  
Mortgage-backed securities    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 0 0
Unrealized Losses, In Loss Position Less than12 months 0 0
Fair market value, In Loss Position Greater than12 months 252 32
Unrealized Losses, In Loss Position Greater than12 months (71) (9)
Fair market value, Total 252 32
Unrealized Losses, Total (71) (9)
Fixed Income    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 3,299 9,010
Unrealized Losses, In Loss Position Less than12 months (463) (2,557)
Fair market value, In Loss Position Greater than12 months 2,657 733
Unrealized Losses, In Loss Position Greater than12 months (1,448) (838)
Fair market value, Total 5,956 9,743
Unrealized Losses, Total (1,911) $ (3,395)
Equity and Other Securities [Member]    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 2  
Unrealized Losses, In Loss Position Less than12 months 0  
Fair market value, In Loss Position Greater than12 months 18  
Unrealized Losses, In Loss Position Greater than12 months (1)  
Fair market value, Total 20  
Unrealized Losses, Total (1)  
Fixed Income Securities    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 732  
Unrealized Losses, In Loss Position Less than12 months 94  
Fair market value, In Loss Position Greater than12 months 360  
Unrealized Losses, In Loss Position Greater than12 months 13  
Fair market value, Total 1,092  
Unrealized Losses, Total $ 107