Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities
Net loss	$ (60,798)	$ (90,806)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	17,013	14,813
Stock-based compensation	19,028	16,788
Amortization of debt discount and issuance costs	1,087	1,440
Non-cash lease expense	4,816	3,169
Impairment costs	113	0
Net (gain) loss on IRLCs, forward sales commitments, and loans held for sale	(8,326)	60
Change in fair value of mortgage servicing rights, net	1,208	0
Gain on extinguishment of convertible senior notes	(42,270)	0
Other	(1,174)	2,290
Change in assets and liabilities:
Accounts receivable, net	6,738	17,312
Inventory	103,588	112,734
Prepaid expenses and other assets	1,110	(1,982)
Accounts payable	(1,675)	9,876
Accrued and other liabilities, deferred tax liabilities, and payroll tax liabilities, noncurrent	(16,813)	(14,442)
Lease liabilities	(4,619)	(3,642)
Origination of mortgage servicing rights	(347)	0
Origination of loans held for sale	(854,085)	(159,186)
Proceeds from sale of mortgage servicing rights	339	0
Proceeds from sale of loans originated as held for sale	861,771	170,577
Net cash provided by operating activities	26,704	79,001
Investing activities
Purchases of property and equipment	(2,919)	(7,442)
Purchases of investments	(57,556)	(77,596)
Sales of investments	12,014	5,346
Maturities of investments	48,483	6,500
Net cash provided by (used in) investing activities	22	(73,192)
Financing activities
Proceeds from the issuance of common stock pursuant to employee equity plans	143	1,887
Tax payments related to net share settlements on restricted stock units	(3,161)	(2,595)
Borrowings from warehouse credit facilities	852,988	152,386
Repayments to warehouse credit facilities	(858,214)	(163,144)
Borrowings from secured revolving credit facility	0	156,799
Repayments to secured revolving credit facility	0	(219,711)
Principal payments under finance lease obligations	(40)	(217)
Repurchases of convertible senior notes	(108,274)	0
Cash paid for secured revolving credit facility issuance costs	0	(764)
Net cash used in financing activities	(116,558)	(75,359)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(58)	(4)
Net change in cash, cash equivalents, and restricted cash	(89,890)	(69,554)
Beginning of period	242,246	718,281
End of period	152,356	648,727
Cash, cash equivalents, and restricted cash:	(89,890)	(69,554)
Supplemental disclosure of cash flow information
Cash paid for interest	4,609	3,377
Non-cash transactions
Stock-based compensation capitalized in property and equipment	1,134	1,134
Property and equipment additions in accounts payable and accrued liabilities	$ 32	$ 326