Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Invesments [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Gain (Loss) on Investments [Line Items]
Impairment charge, other than temporary decline in fair value of investments	$ 100	$ 0	$ 500
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		7,723		$ 10,067
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(1,762)		(476)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		8,251		13,733
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(1,126)		(2,596)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		15,974		23,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(2,888)		(3,072)
Municipal Bonds [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value				137
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss				(3)
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				137
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss				(3)
Foreign Debt [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		93		1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(2)		(120)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,138		1,961
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(115)		(315)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,231		3,580
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(117)		(435)
Corporate Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		1,435		4,679
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(276)		(152)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		417		1,439
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(92)		(669)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,852		6,118
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(368)		(821)
Common Stock [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		5,393		1,563
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(1,466)		(121)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,221		2,004
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(555)		(1,025)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		6,614		3,567
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(2,021)		(1,146)
Preferred Stock [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		681		2,038
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(4)		(77)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		5,475		8,329
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(364)		(587)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		6,156		10,367
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(368)		(664)
Mortgage Backed Securities [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		121		31
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(14)		(3)
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		121		31
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		(14)		$ (3)
Mutual Fund [Member]
Gain (Loss) on Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
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		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 0