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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
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Gain (Loss) on Investments [Line Items]      
Impairment charge, other than temporary decline in fair value of investments $ 400 $ 500  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 8,246   $ 27,763
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2,253)   (3,995)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 19,523   8,245
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (3,745)   (2,174)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 27,769   36,008
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (5,998)   (6,169)
Municipal Bonds [Member]      
Gain (Loss) on Investments [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 112   280
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (3)   (45)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 263   0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (69)   0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 375   280
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (72)   (45)
Foreign Debt [Member]      
Gain (Loss) on Investments [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 2,134   2,541
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (143)   (265)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,670   281
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (428)   (215)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 3,804   2,822
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (571)   (480)
Corporate Debt Securities [Member]      
Gain (Loss) on Investments [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 2,198   10,463
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (259)   (2,164)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 6,490   2,210
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1,443)   (931)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 8,688   12,673
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (1,702)   (3,095)
Common Stock [Member]      
Gain (Loss) on Investments [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 3,460   7,379
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (1,838)   (1,220)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,184   2,186
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (891)   (719)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 4,644   9,565
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss (2,729)   (1,939)
Preferred Stock [Member]      
Gain (Loss) on Investments [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 342   7,100
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (10)   (301)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 9,916   3,568
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (914)   (309)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 10,258   10,668
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ (924)   $ (610)