Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net earnings	$ 180,681	$ 92,312	$ 131,616
Adjustments to reconcile net earnings to cash provided by operating activities:
Universal life and annuity contract interest	213,184	206,250	295,330
Surrender charges and other policy revenues	(26,315)	(26,623)	(32,909)
Realized (gains) losses on investments	(14,950)	(21,071)	(6,241)
Accretion/amortization of discounts and premiums, investments	1,846	3,371	2,264
Depreciation and amortization	13,001	11,903	11,677
Increase (decrease) in estimated credit losses on investments	501	(2,027)	0
(Increase) decrease in value of debt securities trading	(11,331)	0	0
(Increase) decrease in value of equity securities	(6,369)	937	(4,051)
(Increase) decrease in value of derivative options	(120,717)	(14,754)	(123,207)
(Increase) decrease in deferred policy acquisition and sales inducement costs, and value of business acquired	(25,594)	82,897	69,176
(Increase) decrease in accrued investment income	3,929	4,975	9,157
(Increase) decrease in reinsurance recoverable	169,313	728	(7,512)
(Increase) decrease in cost of reinsurance	13,154	0	0
(Increase) decrease in other assets	(6,017)	(620)	(5,236)
Increase (decrease) in liabilities for future policy benefits	114,873	14,138	13,758
(Decrease) increase in other policyholder liabilities	(4,142)	10,873	(21,955)
(Decrease) increase in Federal income tax liability	12,739	(14,156)	21,580
Increase (decrease) in deferred Federal income tax	3,746	20,031	(25,294)
Increase (decrease) in funds withheld liability	(212,324)	0	0
(Decrease) increase in other liabilities	(22,383)	3,907	876
Net cash provided by (used in) operating activities	276,825	373,071	329,029
Proceeds from sales of:
Debt securities available-for-sale	1,221,308	0	87,298
Other investments	38,975	9,198	30,082
Proceeds from maturities, redemptions, and prepayments of:
Debt securities held-to-maturity	0	960,360	700,759
Debt securities available-for-sale	1,520,734	334,397	295,026
Debt securities trading	61,313	0	0
Other investments	22,597	13,715	6,263
Derivatives, index options	197,877	106,451	52,768
Purchases of:
Debt securities held-to-maturity	0	(544,092)	(257,928)
Debt securities available-for-sale	(1,382,318)	(297,998)	(187,570)
Debt securities trading	(1,140,965)	0	0
Equity securities	(15,265)	(1,395)	(1,342)
Derivatives, index options	(47,383)	(62,568)	(77,381)
Other investments	(57,153)	(52,944)	(7,315)
Property, equipment, and other productive assets	(9,977)	(12,106)	(2,844)
Payment to acquire businesses, net of cash acquired	0	0	(189,121)
Principal payments on mortgage loans	28,847	14,814	47,755
Cost of mortgage loans acquired	(183,601)	(80,220)	(121,420)
(Increase) decrease in policy loans	2,797	5,925	2,844
Payments For Proceeds From Funds Withheld	(77,191)	0	0
Net cash provided by investing activities	180,595	393,537	377,874
Cash flows from financing activities:
Dividends on common stock	(1,272)	(1,273)	(1,273)
Deposits to account balances for universal life and annuity contracts	610,357	501,867	405,236
Return of account balances on universal life and annuity contracts	(932,531)	(939,309)	(989,980)
Borrowings under line of credit agreement	0	0	75,000
Principal payments on line of credit borrowings	0	0	(75,000)
Principal payments under finance lease obligation	(389)	(378)	0
Net cash provided by (used in) financing activities	(323,835)	(439,093)	(586,017)
Effect of foreign exchange	(20)	19	663
Net increase (decrease) in cash, cash equivalents, and restricted cash	133,565	327,534	121,549
Cash, cash equivalents, and restricted cash at beginning of year	581,059	253,525	131,976
Cash, cash equivalents, and restricted cash at end of year	714,624	581,059	253,525
Cash paid during the year for:
Interest	75	75	271
Income taxes	30,043	13,980	37,153
Noncash operating activities:
Net deferral and amortization of sales inducements	4,355	(12,464)	(17,195)
Establishment of funds withheld liability (see Note 5)	0	1,697,591	0
Deferred cost of reinsurance (see Note 5)	0	102,840	0
Noncash investing activities:
Contingent consideration to acquire businesses	0	0	3,700
Exchange of debt securities available-for-sale for equity securities	0	0	2,452
Exchange of debt securities available-for-sale	0	0	782
Exchange of debt securities trading	4,800	0	0
Right of use asset obtained in exchange for finance lease liability	$ 1,422	$ 0	$ 0