Deferred Policy Acquisition Costs - Reconciliation of DAC (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred Policy Acquisition Cost [Line Items]
Total DAC, net	$ 3,566,126	$ 3,447,234
Term Life Insurance [Member]
Deferred Policy Acquisition Cost [Line Items]
Total DAC, net	3,489,376	3,366,281	$ 3,106,148
Segregated Funds (Canada) [Member]
Deferred Policy Acquisition Cost [Line Items]
Total DAC, net	59,624	63,029	$ 62,341
Other [Member]
Deferred Policy Acquisition Cost [Line Items]
Total DAC, net	$ 17,126	$ 17,924