Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Significant Of Accounting Policies [Line Items]
Number of reportable segments | segment		3
Mortgage loans	$ 396,088	$ 396,088	$ 279,199
Concentration risk percentage		100.00%
Capital called from investment funds		$ 239,000
Investment funds, unfunded commitments	$ 433,000	$ 433,000
Percentage of investment securities not classified as corporate securities, state and municipal securities, redeemable preferred stocks and U.S. government securities (less than)	1.00%	1.00%
Fair value determined by third party	98.00%	98.00%
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued investment income	Accrued investment income
Agent first year commissions (as a percent)		65.00%
Agent debit balances	$ 542,000	$ 542,000	501,000
Agent debit balances, allowance for credit losses	1,400	1,400	1,200
Advertising costs charged to earnings and included in other operating		15,700	19,200	$ 9,400
Capitalized advertising costs	1,600,000	1,600,000	1,600,000
Increase in goodwill		8,700
Carrying value of investment in low-income housing interests	270,000	270,000	267,000
Obligations under future commitments for low-income housing interests	76,000	76,000
Original cost of property and equipment	527,000	527,000	455,000
Accumulated depreciation	242,000	242,000	215,000
Depreciation expense		27,000	21,000	21,000
Transfer of fixed maturities and accrued investment income in connection with reinsurance transaction		$ 462,000
Coinsurance agreement, ceding commission, before tax	$ 50,000
Assets held in trust of reserves (as a percent)	105.00%	105.00%
Insurance policy charges		$ 12,300	12,900	$ 13,500
Commercial loan participations
Significant Of Accounting Policies [Line Items]
Financing receivable, term		3 years
Financing receivable, extension term		2 years
Unfunded Loan Commitment
Significant Of Accounting Policies [Line Items]
Mortgage loans	$ 22,000	$ 22,000
Equity Option | Torchmark Corporation 2018 Incentive Plan
Significant Of Accounting Policies [Line Items]
Term over which monthly data points are used to derive volatility		3 years
Equity Option | Torchmark Corporation 2018 Incentive Plan | Employee | Three Year Vesting Period
Significant Of Accounting Policies [Line Items]
Option grants contractual term		7 years
Vesting period		3 years
Equity Option | Torchmark Corporation 2018 Incentive Plan | Employee | Five Year Vesting Period
Significant Of Accounting Policies [Line Items]
Option grants contractual term		10 years
Vesting period		5 years
Equity Option | Torchmark Corporation 2018 Incentive Plan | Director
Significant Of Accounting Policies [Line Items]
Vesting period		6 months
Life insurance
Significant Of Accounting Policies [Line Items]
Proportion of future policy reserves which are not universal life type		93.00%
Low-income housing credits and certain limited partnerships | Total Assets | Investment Type
Significant Of Accounting Policies [Line Items]
Concentration risk percentage		2.00%
Minimum | Equipment and Software
Significant Of Accounting Policies [Line Items]
Property and equipment, estimated useful life	3 years	3 years
Minimum | Building and Improvements
Significant Of Accounting Policies [Line Items]
Property and equipment, estimated useful life	15 years	15 years
Maximum | Equipment and Software
Significant Of Accounting Policies [Line Items]
Property and equipment, estimated useful life	15 years	15 years
Maximum | Building and Improvements
Significant Of Accounting Policies [Line Items]
Property and equipment, estimated useful life	40 years	40 years
Company-owned life insurance
Significant Of Accounting Policies [Line Items]
Accrued interest receivable	$ 4,200	$ 4,200
Investment in Limited Partnerships
Significant Of Accounting Policies [Line Items]
Capital called from investment funds		239,000	$ 154,000
Investment funds, unfunded commitments	$ 433,396	$ 433,396
Investment in Limited Partnerships | Minimum
Significant Of Accounting Policies [Line Items]
Investment funds ownership percentage		1.00%
Investment in Limited Partnerships | Maximum
Significant Of Accounting Policies [Line Items]
Investment funds ownership percentage		20.00%