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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
Mar. 31, 2019
Dec. 31, 2018
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 14,518 $ 21,221
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,677) (3,612)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 8,380 4,492
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,712) (1,727)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 22,898 25,713
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (3,389) (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 1,571 1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (33) (189)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 838 639
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (149) (196)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,409 2,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (182) (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 903 7,006
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (58) (587)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 3,590 301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (270) (143)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 4,493 7,307
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (328) (730)
Common Stock [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 8,369 9,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,433) (2,557)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 917 733
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (890) (838)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 9,286 9,743
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (2,323) (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 3,251 3,586
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (152) (279)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 2,959 2,787
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (390) (541)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 6,210 6,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (542) (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 76 32
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (13) (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 76 32
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (13) $ (9)
Mutual Fund [Member]    
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 424  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1)  
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 424  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (1)