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Policyholder Liabilities (Account Balances by Guaranteed Minimum Interest Rates) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 59,856,677	$ 58,781,836
Fixed Index Annuities
Policyholder Account Balance [Line Items]
Policyholder account balance	54,040,238	53,826,234	$ 55,003,305
Allocated to index strategies	45,203,494	45,550,513
Fixed Index Annuities | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 1,813,828	$ 1,184,711
Fixed Index Annuities | 0.00% - 0.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.00%	0.00%
Fixed Index Annuities | 0.00% - 0.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.50%	0.50%
Fixed Index Annuities | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 5,884,830	$ 5,857,020
Fixed Index Annuities | 0.50% - 1.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.50%	0.50%
Fixed Index Annuities | 0.50% - 1.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.00%	1.00%
Fixed Index Annuities | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 57,495	$ 60,977
Fixed Index Annuities | 1.00% - 1.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.00%	1.00%
Fixed Index Annuities | 1.00% - 1.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.50%	1.50%
Fixed Index Annuities | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 50	$ 57
Fixed Index Annuities | 1.50% - 2.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.50%	1.50%
Fixed Index Annuities | 1.50% - 2.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.00%	2.00%
Fixed Index Annuities | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 215,004	$ 233,272
Fixed Index Annuities | 2.00% - 2.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.00%	2.00%
Fixed Index Annuities | 2.00% - 2.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.50%	2.50%
Fixed Index Annuities | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 865,537	$ 939,684
Fixed Index Annuities | 2.50% - 3.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.50%	2.50%
Fixed Index Annuities | 2.50% - 3.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	3.00%	3.00%
Fixed Index Annuities | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 0	$ 0
Fixed Index Annuities | Greater than 3.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	3.00%	3.00%
Fixed Index Annuities | At guaranteed minimum
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 3,512,986	$ 3,546,181
Fixed Index Annuities | At guaranteed minimum | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | At guaranteed minimum | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	2,470,011	2,421,795
Fixed Index Annuities | At guaranteed minimum | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	48,145	51,586
Fixed Index Annuities | At guaranteed minimum | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	50	57
Fixed Index Annuities | At guaranteed minimum | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	129,460	133,059
Fixed Index Annuities | At guaranteed minimum | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	865,320	939,684
Fixed Index Annuities | At guaranteed minimum | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | 1 to 50
Policyholder Account Balance [Line Items]
Policyholder account balance	1,883,278	1,670,284
Fixed Index Annuities | 1 to 50 | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	695,154	462,356
Fixed Index Annuities | 1 to 50 | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	1,093,223	1,098,332
Fixed Index Annuities | 1 to 50 | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	9,350	9,391
Fixed Index Annuities | 1 to 50 | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | 1 to 50 | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	85,536	100,205
Fixed Index Annuities | 1 to 50 | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	15	0
Fixed Index Annuities | 1 to 50 | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | 51 to 150
Policyholder Account Balance [Line Items]
Policyholder account balance	2,679,319	2,666,426
Fixed Index Annuities | 51 to 150 | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	464,407	407,426
Fixed Index Annuities | 51 to 150 | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	2,214,702	2,258,992
Fixed Index Annuities | 51 to 150 | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | 51 to 150 | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | 51 to 150 | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	8	8
Fixed Index Annuities | 51 to 150 | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	202	0
Fixed Index Annuities | 51 to 150 | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | Greater than 150 basis points above
Policyholder Account Balance [Line Items]
Policyholder account balance	761,161	392,830
Fixed Index Annuities | Greater than 150 basis points above | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	654,267	314,929
Fixed Index Annuities | Greater than 150 basis points above | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	106,894	77,901
Fixed Index Annuities | Greater than 150 basis points above | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | Greater than 150 basis points above | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | Greater than 150 basis points above | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | Greater than 150 basis points above | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Index Annuities | Greater than 150 basis points above | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities
Policyholder Account Balance [Line Items]
Policyholder account balance	6,746,365	6,589,577	$ 6,860,060
Fixed Rate Annuities | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 148	$ 61
Fixed Rate Annuities | 0.00% - 0.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.00%	0.00%
Fixed Rate Annuities | 0.00% - 0.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.50%	0.50%
Fixed Rate Annuities | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 5,192,928	$ 4,961,020
Fixed Rate Annuities | 0.50% - 1.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	0.50%	0.50%
Fixed Rate Annuities | 0.50% - 1.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.00%	1.00%
Fixed Rate Annuities | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 458,722	$ 454,959
Fixed Rate Annuities | 1.00% - 1.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.00%	1.00%
Fixed Rate Annuities | 1.00% - 1.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.50%	1.50%
Fixed Rate Annuities | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 631,558	$ 655,703
Fixed Rate Annuities | 1.50% - 2.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	1.50%	1.50%
Fixed Rate Annuities | 1.50% - 2.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.00%	2.00%
Fixed Rate Annuities | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 19,272	$ 21,909
Fixed Rate Annuities | 2.00% - 2.50% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.00%	2.00%
Fixed Rate Annuities | 2.00% - 2.50% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.50%	2.50%
Fixed Rate Annuities | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 392,519	$ 441,459
Fixed Rate Annuities | 2.50% - 3.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	2.50%	2.50%
Fixed Rate Annuities | 2.50% - 3.00% | Maximum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	3.00%	3.00%
Fixed Rate Annuities | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 51,218	$ 54,466
Fixed Rate Annuities | Greater than 3.00% | Minimum
Policyholder Account Balance [Line Items]
Policyholder account balance, guaranteed minimum credit rating	3.00%	3.00%
Fixed Rate Annuities | At guaranteed minimum
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 1,332,799	$ 1,302,336
Fixed Rate Annuities | At guaranteed minimum | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	148	61
Fixed Rate Annuities | At guaranteed minimum | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	54,489	55,458
Fixed Rate Annuities | At guaranteed minimum | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	458,488	454,728
Fixed Rate Annuities | At guaranteed minimum | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	363,889	281,694
Fixed Rate Annuities | At guaranteed minimum | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	19,249	21,887
Fixed Rate Annuities | At guaranteed minimum | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	385,318	434,042
Fixed Rate Annuities | At guaranteed minimum | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	51,218	54,466
Fixed Rate Annuities | 1 to 50
Policyholder Account Balance [Line Items]
Policyholder account balance	226,742	307,960
Fixed Rate Annuities | 1 to 50 | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 1 to 50 | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	185,377	203,523
Fixed Rate Annuities | 1 to 50 | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	234	231
Fixed Rate Annuities | 1 to 50 | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	33,907	96,767
Fixed Rate Annuities | 1 to 50 | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	23	22
Fixed Rate Annuities | 1 to 50 | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	7,201	7,417
Fixed Rate Annuities | 1 to 50 | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 51 to 150
Policyholder Account Balance [Line Items]
Policyholder account balance	4,193,905	4,277,256
Fixed Rate Annuities | 51 to 150 | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 51 to 150 | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	3,960,356	4,000,203
Fixed Rate Annuities | 51 to 150 | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 51 to 150 | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	233,549	277,053
Fixed Rate Annuities | 51 to 150 | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 51 to 150 | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | 51 to 150 | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | Greater than 150 basis points above
Policyholder Account Balance [Line Items]
Policyholder account balance	992,919	702,025
Fixed Rate Annuities | Greater than 150 basis points above | 0.00% - 0.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | Greater than 150 basis points above | 0.50% - 1.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	992,706	701,836
Fixed Rate Annuities | Greater than 150 basis points above | 1.00% - 1.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | Greater than 150 basis points above | 1.50% - 2.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	213	189
Fixed Rate Annuities | Greater than 150 basis points above | 2.00% - 2.50%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | Greater than 150 basis points above | 2.50% - 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	0	0
Fixed Rate Annuities | Greater than 150 basis points above | Greater than 3.00%
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 0	$ 0

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