The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (cc)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-3

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-3

Name:	us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Liability for Unpaid Claims - Schedule of Reconciliation of Policy Claims and Other Benefits Payable (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Jan. 01, 2021	Dec. 31, 2020
Policy claims and other benefits payable:
Policy claims and other benefits payable	$ 503,072	$ 507,219	$ 473,524	$ 399,507
Life insurance
Policy claims and other benefits payable:
Policy claims and other benefits payable	313,489	325,017
Health insurance
Policy claims and other benefits payable:
Policy claims and other benefits payable	$ 189,583	$ 182,202