Summary of Business and Significant Accounting Policies - Revised Equity Statements and Note 10 (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 625,668	$ 668,560	$ 542,369	$ 668,560	$ 544,186	$ 544,186
Net income (loss)	(137,008)	(47,153)	89,856	(184,161)	89,591
Ending balance	492,404	625,668	630,970	492,404	630,970	668,560	$ 544,186
Deferred income taxes				(62,940)	24,879
Accounts receivable				(43,429)	(61,251)
Net cash used in operating activities				(305,741)	(103,148)
Total revenue	194,981	157,526	357,565	352,508	480,339
Life
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue	32,780		35,666	80,211	77,094
Final expense | Life
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue	10,886		9,816	35,473	26,274
Commission
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue	140,701	132,254	320,265	272,956	425,415
Commission | Life
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue	27,012		29,844	67,845	66,046
As Previously Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		674,889	544,974	674,889	545,689	545,689
Net income (loss)		(45,365)	90,416		91,253
Ending balance			634,135		634,135	674,889	545,689
Deferred income taxes					25,321
Accounts receivable					(63,355)
Net cash used in operating activities					(103,148)
Total revenue		159,923	358,274		482,443
As Previously Reported | Commission
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue		134,651	320,974		427,519
Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		(6,329)	(2,605)	(6,329)	(1,503)	(1,503)
Net income (loss)		(1,788)	(560)		(1,662)	(4,800)
Ending balance			(3,165)		(3,165)	(6,329)	(1,503)
Deferred income taxes					(442)
Accounts receivable					2,104
Net cash used in operating activities					0
Total revenue		(2,397)	(709)		(2,104)
Adjustment | Commission
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total revenue		(2,397)	(709)		(2,104)	(6,100)	(2,000)
Retained Earnings/(Accumulated Deficit)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	74,772	121,925	(4,560)	121,925	(4,295)	(4,295)
Net income (loss)	(137,008)		89,856	(184,161)	89,591
Ending balance	$ (62,236)	$ 74,772	85,296	$ (62,236)	85,296	121,925	(4,295)
Retained Earnings/(Accumulated Deficit) | As Previously Reported
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,955)		(2,792)	(2,792)
Net income (loss)			90,416		91,253
Ending balance			88,461		88,461		(2,792)
Retained Earnings/(Accumulated Deficit) | Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(2,605)		(1,503)	$ (1,503)
Net income (loss)			(560)		(1,662)
Ending balance			$ (3,165)		$ (3,165)		$ (1,503)