Acquisitions (Purchase Price Allocation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jan. 03, 2020	Dec. 31, 2019	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 394,483		$ 398,292	$ 303,887
Lafayette, California [Member]
Business Acquisition [Line Items]
Current assets	2,555	$ 2,662
Property, plant & equipment	1,720	1,720
Cemetery Property Purchase Account Adjustments	82
Cemetery property	14,835	14,753
Goodwill	13,572	12,916
Intangible and other non-current assets	1,878	2,506
Assumed liabilities	(489)	(489)
Purchase Accounting, Adjustments, Deferred Tax Liabilities	(3)
Deferred tax liability	(530)	(527)
Preneed trust liabilities	(9,089)	(9,089)
Deferred revenue	(541)	(541)
Purchase price		33,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Preneed Trust Assets	9,089	$ 9,089
Current Assets, Purchase Accounting Adjustments	(107)
Goodwill, Purchase Accounting Adjustments	656
Intangible Assets And Other Non-Current Assets, Purchase Accounting Adjustments	(628)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net After Adjustment	$ 33,000