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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, 2018
Dec. 31, 2017
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months $ 21,221 $ 8,370
Unrealized Losses, In Loss Position Less than12 months (3,612) (1,073)
Fair market value, In Loss Position Greater than12 months 4,492 8,299
Unrealized Losses, In Loss Position Greater than12 months (1,727) (1,279)
Fair market value, Total 25,713 16,669
Unrealized Losses, Total (5,339) (2,352)
Foreign debt    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 1,619 92
Unrealized Losses, In Loss Position Less than12 months (189) (3)
Fair market value, In Loss Position Greater than12 months 639 1,128
Unrealized Losses, In Loss Position Greater than12 months (196) (131)
Fair market value, Total 2,258 1,220
Unrealized Losses, Total (385) (134)
Corporate debt    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 7,006 2,621
Unrealized Losses, In Loss Position Less than12 months (587) (59)
Fair market value, In Loss Position Greater than12 months 301 555
Unrealized Losses, In Loss Position Greater than12 months (143) (128)
Fair market value, Total 7,307 3,176
Unrealized Losses, Total (730) (187)
Preferred stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months   29
Unrealized Losses, In Loss Position Less than12 months   0
Fair market value, In Loss Position Greater than12 months   5,492
Unrealized Losses, In Loss Position Greater than12 months   (411)
Fair market value, Total   5,521
Unrealized Losses, Total   (411)
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 0 76
Unrealized Losses, In Loss Position Less than12 months 0 (10)
Fair market value, In Loss Position Greater than12 months 32 16
Unrealized Losses, In Loss Position Greater than12 months (9) (5)
Fair market value, Total 32 92
Unrealized Losses, Total (9) (15)
Common stock    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months 9,010 5,119
Unrealized Losses, In Loss Position Less than12 months (2,557) (991)
Fair market value, In Loss Position Greater than12 months 733 1,108
Unrealized Losses, In Loss Position Greater than12 months (838) (604)
Fair market value, Total 9,743 6,227
Unrealized Losses, Total $ (3,395) (1,595)
Mutual Fund [Member]    
Gain (Loss) on Securities [Line Items]    
Fair market value, In Loss Position Less than12 months   433
Unrealized Losses, In Loss Position Less than12 months   (10)
Fair market value, In Loss Position Greater than12 months   0
Unrealized Losses, In Loss Position Greater than12 months   0
Fair market value, Total   433
Unrealized Losses, Total   $ (10)