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Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Invesments [Member] - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 14,235 $ 21,221
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,235) (3,612)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 7,816 4,492
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,481) (1,727)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 22,051 25,713
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (3,716) (5,339)
Foreign Debt [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 1,368 1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (88) (189)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 734 639
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (248) (196)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,102 2,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (336) (385)
Corporate Debt Securities [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 1,971 7,006
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (342) (587)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 3,425 301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (158) (143)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 5,396 7,307
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (500) (730)
Common Stock [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 7,753 9,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,703) (2,557)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,885 733
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (874) (838)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 9,638 9,743
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (2,577) (3,395)
Preferred Stock [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 2,542 3,586
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (25) (279)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,549 2,787
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (69) (541)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 4,091 6,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (94) (820)
Mortgage Backed Securities [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 223 32
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (132) (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 223 32
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (132) $ (9)
Mutual Fund [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 601  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (77)  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 601  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (77)