v3.26.1
Segment Information - Summary of Income (loss) Before Income Taxes by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Revenues $ 865,067 $ 793,334 $ 1,737,759 $ 1,598,177
Expenses:        
Benefits and claims 147,328 152,494 318,582 327,355
Amortization of DAC 85,128 80,043 169,388 158,592
Insurance expenses 71,159 64,362 137,726 129,168
Insurance commissions 5,778 5,751 11,396 11,875
Sales commissions 201,924 166,291 397,134 324,409
Interest expense 5,833 6,000 11,693 12,005
Other operating expenses 94,736 89,791 196,618 188,129
Total benefits and expenses 606,848 558,837 1,230,122 1,142,365
Income before income taxes 258,219 234,497 507,637 455,812
Term Life Insurance Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues 443,605 441,834 908,240 899,676
Expenses:        
Benefits and claims 144,174 148,725 311,425 319,968
Future policy benefits remeasurement (gain) loss (4,858) (5,743) (12,422) (9,145)
Amortization of DAC 83,567 78,386 166,234 155,308
Insurance expenses 70,020 63,216 135,399 126,861
Insurance commissions 2,223 2,238 4,265 4,887
Total benefits and expenses 295,126 286,822 604,901 597,879
Income before income taxes 148,479 155,012 303,339 301,797
Investment and Savings Products Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues 360,518 298,298 711,164 589,109
Expenses:        
Amortization of DAC 1,304 1,368 2,638 2,705
Insurance commissions 3,450 3,468 6,907 6,745
Fees based on client asset values 14,493 11,404 27,780 22,319
Fees based on fee-generating positions 10,553 11,015 21,674 23,425
Other operating expenses 30,010 30,677 60,029 58,766
Total benefits and expenses 256,303 218,877 506,049 428,418
Income before income taxes 104,215 79,421 205,115 160,691
Investment and Savings Products Segment [Member] | Sales-based        
Expenses:        
Sales commissions 95,816 82,935 190,984 160,202
Investment and Savings Products Segment [Member] | Asset-based        
Expenses:        
Sales commissions 100,677 78,010 196,037 154,256
Corporate and Other Distributed Products Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues 60,944 53,202 118,355 109,392
Expenses:        
Benefits and claims 3,154 3,769 7,157 7,387
Future policy benefits remeasurement (gain) loss (180) (152) 7 (23)
Amortization of DAC 257 289 516 579
Insurance expenses 1,139 1,146 2,327 2,307
Insurance commissions 105 45 224 243
Sales commissions 5,431 5,346 10,113 9,951
Interest expense 5,833 6,000 11,693 12,005
Other operating expenses 39,680 36,695 87,135 83,619
Total benefits and expenses 55,419 53,138 119,172 116,068
Income before income taxes $ 5,525 $ 64 $ (817) $ (6,676)