Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue:
Revenue		$ 4,666,272	$ 4,456,017	$ 4,310,242
Net investment income		1,135,631	1,056,884	991,800
Realized gains (losses)		(24,188)	(65,676)	(76,548)
Other income		354	308	1,246
Total revenue		5,778,069	5,447,533	5,226,740
Benefits and expenses:
Total policyholder benefits		2,894,443	2,864,251	2,825,434
Amortization of deferred acquisition costs		410,001	379,700	348,824
Commissions, premium taxes, and non-deferred acquisition costs		600,753	559,167	506,022
Other operating expense		419,143	347,833	353,954
Interest expense		127,092	102,316	90,395
Total benefits and expenses		4,451,432	4,253,267	4,124,629
Income before income taxes		1,326,637	1,194,266	1,102,111
Income tax benefit (expense)		(255,875)	(223,511)	(207,725)
Net income		$ 1,070,762	$ 970,755	$ 894,386
Basic net income per common share (in dollars per share)		$ 11.99	$ 10.21	$ 9.13
Diluted net income per common share (in dollars per share)		$ 11.94	$ 10.07	$ 9.04
Life premium
Revenue:
Revenue		$ 3,261,347	$ 3,137,244	$ 3,027,824
Benefits and expenses:
Total policyholder benefits	[1]	2,000,977	2,050,789	2,035,693
Health premium
Revenue:
Revenue		1,404,925	1,318,773	1,282,417
Benefits and expenses:
Total policyholder benefits	[2]	851,577	776,362	752,866
Other premium
Revenue:
Revenue		0	0	1
Benefits and expenses:
Total policyholder benefits		$ 41,889	$ 37,100	$ 36,875

[1] Net of total remeasurement, including both the impact of assumption changes and the effect of actual to expected experience adjustments, resulting in a gain (loss) of $107.0 million, $29.4 million, and $(47.4) million for the year ended December 31, 2024, 2023, and 2022, respectively.

[2] Net of total remeasurement, including both the impact of assumption changes and the effect of actual to expected experience adjustments, resulting in a gain (loss) of $(3.2) million, $11.8 million, and $15.6 million for the year ended December 31, 2024, 2023, and 2022, respectively.