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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
Jun. 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 $ 26,695 $ 12,806
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,454) (1,616)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 9,623 12,361
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,659) (1,933)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 36,318 25,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (5,113) (3,549)
Available-for-sale Securities, Amortized Cost Basis 71,141 71,306
Unrealized Gains 5,829 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 1,821 151
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (99) (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 (148) (187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,836 1,788
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (247) (193)
Corporate Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 9,084 3,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (643) (72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 968 846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (213) (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 10,052 4,581
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (856) (273)
Preferred Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 5,395 48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (162) 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 4,687 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (410) (588)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 10,082 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (572) (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 68 27
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (14) (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 68 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (14) (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 9,570 8,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,491) (1,512)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 2,885 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,874) (948)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 12,455 9,991
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (3,365) (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 825 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (59) (11)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 825 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (59) (11)
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 28,100 26,465
Unrealized Gains 4,741 5,250
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 17,905 18,238
Unrealized Gains 559 $ 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 928  
Unrealized Gains $ 328