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Preneed Trust Investments Preneed Trust Investments (Unrealized losses on cemetery merchandise and service trust investments) (Details) - Preneed Cemetery Trust Investments - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months $ 15,566 $ 40,857
Unrealized Losses, In Loss Position Less than12 months (745) (5,864)
Fair market value, In Loss Position Greater than12 months 20,056 12,194
Unrealized Losses, In Loss Position Greater than12 months (3,827) (3,219)
Fair market value, Total 35,622 53,051
Unrealized Losses, Total (4,572) (9,083)
Municipal bonds    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 228 395
Unrealized Losses, In Loss Position Less than12 months (4) (63)
Fair market value, In Loss Position Greater than12 months 0 0
Unrealized Losses, In Loss Position Greater than12 months 0 0
Fair market value, Total 228 395
Unrealized Losses, Total (4) (63)
Foreign debt    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 2,523 3,680
Unrealized Losses, In Loss Position Less than12 months (180) (384)
Fair market value, In Loss Position Greater than12 months 2,868 406
Unrealized Losses, In Loss Position Greater than12 months (475) (312)
Fair market value, Total 5,391 4,086
Unrealized Losses, Total (655) (696)
Corporate debt    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 6,939 14,468
Unrealized Losses, In Loss Position Less than12 months (233) (2,992)
Fair market value, In Loss Position Greater than12 months 2,168 3,056
Unrealized Losses, In Loss Position Greater than12 months (890) (1,287)
Fair market value, Total 9,107 17,524
Unrealized Losses, Total (1,123) (4,279)
Preferred stock    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 3,217 10,285
Unrealized Losses, In Loss Position Less than12 months (121) (436)
Fair market value, In Loss Position Greater than12 months 11,635 5,168
Unrealized Losses, In Loss Position Greater than12 months (826) (448)
Fair market value, Total 14,852 15,453
Unrealized Losses, Total (947) (884)
Mortgage-backed securities    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 51  
Unrealized Losses, In Loss Position Less than12 months (5)  
Fair market value, In Loss Position Greater than12 months 0  
Unrealized Losses, In Loss Position Greater than12 months 0  
Fair market value, Total 51  
Unrealized Losses, Total (5)  
Common stock    
Gain (Loss) on Investments [Line Items]    
Fair market value, In Loss Position Less than12 months 2,608 12,029
Unrealized Losses, In Loss Position Less than12 months (202) (1,989)
Fair market value, In Loss Position Greater than12 months 3,385 3,564
Unrealized Losses, In Loss Position Greater than12 months (1,636) (1,172)
Fair market value, Total 5,993 15,593
Unrealized Losses, Total $ (1,838) $ (3,161)