Financial Instruments - Schedule of Assets, Liabilities, and Equity Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Liabilities
Mortgage servicing rights, at fair value	$ 2,534	$ 32,171
Fair Value, Measurements, Recurring
Assets
Cash equivalents	114,617	115,276
Loans held for sale	212,921	159,587
Other current assets	5,160	4,600
Total assets	335,232	356,735
Liabilities
Total liabilities	2,007	2,576
Mortgage servicing rights, at fair value	2,534	32,171
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current	0	41,952
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent	0	3,149
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash equivalents	114,617	115,276
Loans held for sale	0	0
Other current assets	0	0
Total assets	114,617	160,377
Liabilities
Total liabilities	0	0
Mortgage servicing rights, at fair value	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		41,952
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Cash equivalents	0	0
Loans held for sale	212,921	159,587
Other current assets	469	0
Total assets	213,390	159,587
Liabilities
Total liabilities	1,755	2,429
Mortgage servicing rights, at fair value	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	0	0
Loans held for sale	0	0
Other current assets	4,691	4,600
Total assets	7,225	36,771
Liabilities
Total liabilities	252	147
Mortgage servicing rights, at fair value	2,534	32,171
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		0
Fair Value, Measurements, Recurring | Money market funds
Assets
Cash equivalents	114,617	115,276
Fair Value, Measurements, Recurring | Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash equivalents	114,617	115,276
Fair Value, Measurements, Recurring | Money market funds | Significant Other Observable Inputs (Level 2)
Assets
Cash equivalents	0	0
Fair Value, Measurements, Recurring | Money market funds | Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	0	0
U.S. treasury securities | Fair Value, Measurements, Recurring
Liabilities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		10,720
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent		3,149
U.S. treasury securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		10,720
U.S. treasury securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Short-term investments		0
U.S. treasury securities | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Short-term investments		0
Agency bonds | Fair Value, Measurements, Recurring
Liabilities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		31,232
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent		0
Agency bonds | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current		31,232
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent		3,149
Agency bonds | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Short-term investments		0
Long-term investments		0
Agency bonds | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Short-term investments		0
Long-term investments		0
Forward sales commitments | Fair Value, Measurements, Recurring
Assets
Other current assets	469
Liabilities
Accrued liabilities	1,755	2,429
Forward sales commitments | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other current assets	0
Liabilities
Accrued liabilities	0	0
Forward sales commitments | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Other current assets	469
Liabilities
Accrued liabilities	1,755	2,429
Forward sales commitments | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Other current assets	0
Liabilities
Accrued liabilities	0	0
IRLCs | Fair Value, Measurements, Recurring
Assets
Other current assets	4,691	4,600
Liabilities
Accrued liabilities	252	147
IRLCs | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other current assets	0	0
Liabilities
Accrued liabilities	0	0
IRLCs | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Other current assets	0	0
Liabilities
Accrued liabilities	0	0
IRLCs | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Other current assets	4,691	4,600
Liabilities
Accrued liabilities	$ 252	$ 147