Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue	$ 4,099,887	$ 3,813,905	$ 3,595,134
Net investment income	952,447	927,062	910,459
Realized gains (losses)	59,319	(4,371)	20,621
Other income	1,216	1,325	1,318
Total revenue	5,112,869	4,737,921	4,527,532
Benefits and expenses:
Life policyholder benefits	2,071,810	1,809,373	1,638,053
Health policyholder benefits	758,745	733,481	687,764
Other policyholder benefits	29,061	30,030	31,532
Total policyholder benefits	2,859,616	2,572,884	2,357,349
Amortization of deferred acquisition costs	603,838	575,770	551,726
Commissions, premium taxes, and non-deferred acquisition costs	331,510	304,841	298,047
Other operating expense	322,029	301,038	304,825
Interest expense	83,486	86,704	84,306
Total benefits and expenses	4,200,479	3,841,237	3,596,253
Income before income taxes	912,390	896,684	931,279
Income tax benefit (expense)	(167,431)	(164,911)	(170,397)
Income from continuing operations	744,959	731,773	760,882
Income (loss) from discontinued operations, net of tax	0	0	(92)
Net income	$ 744,959	$ 731,773	$ 760,790
Basic net income (loss) per common share:
Continuing operations (in dollars per share)	$ 7.30	$ 6.90	$ 6.97
Discontinued operations (in dollars per share)	0	0	0
Basic net income per common share (in dollars per share)	7.30	6.90	6.97
Diluted net income (loss) per common share:
Continuing operations (in dollars per share)	7.22	6.82	6.83
Discontinued operations (in dollars per share)	0	0	0
Total diluted net income per common share (in dollars per share)	$ 7.22	$ 6.82	$ 6.83
Life premium
Revenue:
Revenue	$ 2,898,210	$ 2,672,804	$ 2,517,784
Health premium
Revenue:
Revenue	1,201,676	1,141,097	1,077,346
Other premium
Revenue:
Revenue	$ 1	$ 4	$ 4