Basis of Presentation and Summary of Significant Accounting Policies (Operations) (Details) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) cemeteries states funeral_homes	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($) funeral_homes cemeteries states segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Jan. 03, 2020 USD ($)
Organization Description and Operations [Line Items]
Depreciation expense			$ 3,500		$ 10,800	$ 10,400
Number of business segments | segment					2
Amortization Of Cemetery Property	$ 1,500		1,000		$ 3,400	3,000
Trade and financed receivables	$ 21,090				$ 21,090		$ 20,554
The percentage of trust assets in custody of institution receiving trust management services	80.00%				80.00%
Accounts receivable, net of allowance for bad debts	$ 22,277				$ 22,277		21,478
Preneed receivables	20,324				20,324		20,173
Bad debt expense					1,837	1,188
Income Tax Expense (Benefit), Net Of Uncertain Tax Positions	$ (2,859)		$ (947)		$ (4,158)	$ (5,770)
Income taxes before discrete items	34.00%		61.00%		33.80%	31.30%
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 1,100
Goodwill, Impairment Loss		$ 13,600		$ 0	$ 13,632
Unearned finance charges associated with receivables	$ 4,166				4,166		4,522
Amortization of capitalized commissions on preneed contracts	145		$ 140		430	$ 417
Accumulated Amortization, Property, Plant, and Equipment	(45,100)				$ (45,100)		(41,700)
Lease Term, Options To Extend					26 years
Property, plant and equipment, gross	101,300				$ 101,300		87,000
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(100)
Proceeds from divestitures and sale of other assets	7,300				7,416	967	$ 900
Property, Plant and Equipment, Disposals	6,500
Property, Plant and Equipment, Additions					(10,000)
Total benefit for income taxes	$ 2,859		947		$ 4,158	5,770
Funeral And Cemetery [Member]
Organization Description and Operations [Line Items]
Bad debt expense			$ 300			$ 800
Funeral homes [Member]
Organization Description and Operations [Line Items]
Number of owned and operated funeral homes (in Funeral Homes) | funeral_homes	180				180
Number of states in which Company operates | states	27				27
Revenue, Percentage	75.00%				75.00%
Cemeteries [Member]
Organization Description and Operations [Line Items]
Number of states in which Company operates | states	12				12
Number of owned and operated cemeteries (in Cemetaries) | cemeteries	32				32
Revenue, Percentage	25.00%				25.00%
Lafayette, California [Member]
Organization Description and Operations [Line Items]
Accounts Receivable, Allowance for Credit Loss, Noncurrent	$ 400				$ 400
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)					500
Property, plant & equipment	$ 1,720				$ 1,720			$ 1,720
Minimum [Member]
Organization Description and Operations [Line Items]
Service Contract, Term					8 years
Lessee, Operating Lease, Term of Contract	1 year				1 year
Lessee, Finance Lease, Term of Contract	10 years				10 years
Maximum [Member]
Organization Description and Operations [Line Items]
Service Contract, Term					10 years
Lessee, Operating Lease, Term of Contract	19 years				19 years
Lessee, Finance Lease, Term of Contract	40 years				40 years