Condensed Consolidated Statements of Cash Flows - 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
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (137,008)	$ (47,153)	$ 89,856	$ (184,161)	$ 89,591
Adjustments to reconcile net income (loss) to net cash, cash equivalents, and restricted cash used in operating activities:
Depreciation and amortization				11,278	6,937
Loss on disposal of property, equipment, and software	5		79	355	162
Share-based compensation expense				4,109	2,259
Deferred income taxes				(62,940)	24,879
Amortization of debt issuance costs and debt discount				2,974	1,644
Fair value adjustments to contingent earnout obligations			395	0	1,153
Non-cash lease expense				2,040	1,887
Changes in operating assets and liabilities:
Accounts receivable				(43,429)	(61,251)
Commissions receivable				(39,908)	(219,132)
Other assets				(5,555)	1,906
Accounts payable and accrued expenses				15,135	15,692
Operating lease liabilities				(2,676)	(1,245)
Other liabilities				(2,963)	32,370
Net cash used in operating activities				(305,741)	(103,148)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment				(17,904)	(5,768)
Purchases of software and capitalized software development costs				(5,231)	(3,449)
Acquisition of business				(6,927)	121
Investment in equity securities				(1,000)	0
Net cash used in investing activities				(31,062)	(9,096)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving line of credit				50,000	0
Payments on revolving line of credit				(50,000)	0
Net proceeds from Term Loans				242,000	0
Payments on other debt				(93)	(108)
Proceeds from common stock options exercised and employee stock purchase plan	100		100	2,271	391
Payments of tax withholdings related to net share settlement of equity awards				(144)	(5,320)
Payments of debt issuance costs				(328)	0
Net cash provided by financing activities				243,706	(10,719)
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH				(93,097)	(122,963)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—Beginning of period		$ 286,454		286,454	368,870	$ 368,870
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—End of period	193,357		245,907	193,357	245,907	286,454
Reconciliation to the Consolidated Balance Sheets:
Cash and cash equivalents	193,357		209,739	193,357	209,739	286,454
Restricted cash	0		36,168	0	36,168
Total cash, cash equivalents, and restricted cash	$ 193,357		$ 245,907	193,357	245,907	$ 286,454
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net				(15,447)	(11,953)
Income taxes paid, net				(19)	(86)
Private Placement
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of stock issuance costs				0	(1,771)
IPO
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of stock issuance costs				$ 0	$ (3,911)