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Preneed Trust Investments (Unrealized losses on preneed funeral trust investments) (Details) - Preneed Funeral Trust Investments [Member] - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 26,143 $ 14,075
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (3,020) (1,620)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12,943 13,013
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,546) (1,990)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 39,086 27,088
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (5,566) (3,610)
US States and Political Subdivisions Debt Securities [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 1,313 1,325
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (25) (15)
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 1,313 1,325
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (25) (15)
Foreign Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 542 159
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (21) (6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,560 1,608
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (217) (183)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,102 1,767
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (238) (189)
Corporate Debt [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 6,988 3,770
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (475) (74)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 752 842
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (201) (203)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 7,740 4,612
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (676) (277)
Preferred Stock [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 4,645 50
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (42) 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 8,294 8,184
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (699) (585)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 12,939 8,234
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (741) (585)
Collateralized Mortgage Backed Securities [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 167 221
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1) (17)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 84 36
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (28) (10)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 251 257
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (29) (27)
Equity [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 11,560 8,001
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,409) (1,496)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,682 1,728
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,342) (972)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 13,242 9,729
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (3,751) (2,468)
Fixed Income [Member]    
Gain (Loss) on Investments [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 928 549
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (47) (12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 571 615
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (59) (37)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 1,499 1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (106) $ (49)