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Cemetery Perpetual Care Trust Investments Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Invesments - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | $ 10,067 | $ 27,763
Unrealized Losses, In Loss Position Less than12 months | (476) | (3,995)
Fair market value, In Loss Position Greater than12 months | 13,733 | 8,245
Unrealized Losses, In Loss Position Greater than12 months | (2,596) | (2,174)
Fair market value, Total | 23,800 | 36,008
Unrealized Losses, Total | (3,072) | (6,169)
Municipal bonds |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 137 |
Unrealized Losses, In Loss Position Less than12 months | (3) |
Fair market value, In Loss Position Greater than12 months | 0 |
Unrealized Losses, In Loss Position Greater than12 months | 0 |
Fair market value, Total | 137 |
Unrealized Losses, Total | (3) |
Foreign debt |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 1,619 | 2,541
Unrealized Losses, In Loss Position Less than12 months | (120) | (265)
Fair market value, In Loss Position Greater than12 months | 1,961 | 281
Unrealized Losses, In Loss Position Greater than12 months | (315) | (215)
Fair market value, Total | 3,580 | 2,822
Unrealized Losses, Total | (435) | (480)
Corporate debt |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 4,679 | 10,463
Unrealized Losses, In Loss Position Less than12 months | (152) | (2,164)
Fair market value, In Loss Position Greater than12 months | 1,439 | 2,210
Unrealized Losses, In Loss Position Greater than12 months | (669) | (931)
Fair market value, Total | 6,118 | 12,673
Unrealized Losses, Total | (821) | (3,095)
Preferred stock |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months |  | 7,100
Unrealized Losses, In Loss Position Less than12 months |  | (301)
Fair market value, In Loss Position Greater than12 months |  | 3,568
Unrealized Losses, In Loss Position Greater than12 months |  | (309)
Fair market value, Total |  | 10,668
Unrealized Losses, Total |  | (610)
Preferred stock |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 2,038 |
Unrealized Losses, In Loss Position Less than12 months | (77) |
Fair market value, In Loss Position Greater than12 months | 8,329 |
Unrealized Losses, In Loss Position Greater than12 months | (587) |
Fair market value, Total | 10,367 |
Unrealized Losses, Total | (664) |
Mortgage-backed securities |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 31 |
Unrealized Losses, In Loss Position Less than12 months | (3) |
Fair market value, In Loss Position Greater than12 months | 0 |
Unrealized Losses, In Loss Position Greater than12 months | 0 |
Fair market value, Total | 31 |
Unrealized Losses, Total | (3) |
Common stock |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 1,563 | 7,379
Unrealized Losses, In Loss Position Less than12 months | (121) | (1,220)
Fair market value, In Loss Position Greater than12 months | 2,004 | 2,186
Unrealized Losses, In Loss Position Greater than12 months | (1,025) | (719)
Fair market value, Total | 3,567 | 9,565
Unrealized Losses, Total | $ (1,146) | $ (1,939)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563 + Details
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