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Preneed Trust Investments (Unrealized losses on cemetery merchandise and service trust investments) (Details) - Preneed Cemetery Trust Investments [Member] - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 28,917 $ 12,806
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,049) (1,616)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 7,843 12,361
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,443) (1,933)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 36,760 25,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (4,492) (3,549)
Available-for-sale Securities, Amortized Cost Basis 71,397 71,306
Unrealized Gains 4,554 7,535
Foreign Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 1,635 151
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (33) (6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,015 1,637
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (105) (187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,650 1,788
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (138) (193)
Corporate Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 7,814 3,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (284) (72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 437 846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (194) (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 8,251 4,581
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (478) (273)
Preferred Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 5,362 48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (134) 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 3,996 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (356) (588)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 9,358 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (490) (588)
Mortgage Backed Securities [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 127
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0 (15)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 60 27
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (10) (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 60 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (10) (24)
Available-for-sale Securities, Amortized Cost Basis   1,018
Unrealized Gains   249
Common Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 14,106 8,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,598) (1,512)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 2,335 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,778) (948)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 16,441 9,991
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (3,376) (2,460)
Mutual Fund [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value   496
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (11)
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   496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss   (11)
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 28,388 26,465
Unrealized Gains 3,306 5,250
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 16,756 18,238
Unrealized Gains 672 $ 1,184
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 845  
Unrealized Gains $ 343