Loans Receivable and Allowance for Credit Losses - Schedule Of Carrying Value Of Loans Transferred, Loans Sold and Purchased For the Held-For-Investment Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	$ 134,916	$ 307,182	$ 270,451	$ 646,797
Sales	127,489	328,406	256,236	651,198
Purchases	156,645	350,546	711,700	740,665
Write-offs of allowance for loan losses related to loans transferred to held-for-sale		1,000	2,000	2,000
Originated
Loans Receivable and Allowance for Credit Losses
Sales	37,000	309,000	159,000	496,000
Loans sold in secondary market | Purchased
Loans Receivable and Allowance for Credit Losses
Sales	90,000	20,000	97,000	156,000
Commercial lending | C&I
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	134,916	307,182	240,613	646,079
Sales	127,489	326,764	224,186	647,873
Purchases	34,677	247,880	339,321	451,399
Commercial lending | CRE
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	0	0	20,338	0
Sales	0	0	20,338	0
Purchases	0	0	0	0
Commercial lending | Land and construction
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	0	0	9,500	718
Sales	0	0	11,316	718
Purchases	0	0	0	0
Consumer lending | Single-Family Residential
Loans Receivable and Allowance for Credit Losses
Loans transferred from held-for-investment to held-for-sale	0	0	0	0
Sales	0	1,642	396	2,607
Purchases	$ 121,968	$ 102,666	$ 372,379	$ 289,266