Preneed Activities Investment Related Activities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Preneed Activities [Abstract]
Deposits to trust	$ 421,460	$ 519,023	$ 429,307
Withdrawals	435,344	477,443	424,986
Payments to Acquire Debt Securities, Available-for-sale	1,596,698	1,823,267	2,147,935
Proceeds from Sale of Debt Securities, Available-for-sale	1,495,733	1,744,618	1,994,684
Debt Securities, Available-for-sale, Realized Gain	241,661	584,863	418,851
Debt Securities, Available-for-sale, Realized Gain (Loss)	$ 121,272	$ 91,715	$ 262,974

Amounts deposited to trust during the period.

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- Definition

Preneed Activities.

+ References

No definition available.

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- Definition

Amounts withdrawn from trust during the period.

+ References

No definition available.

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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
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-Publisher FASB
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-Name Accounting Standards Codification
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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

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-Publisher FASB
-Name Accounting Standards Codification
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