Loans Receivable and Allowance for Credit Losses - Schedule of Financing Receivable, Modified, Payment Performance (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	$ 446,244		$ 178,080
Total nonaccrual loans included above	83,655		42,441
Commitment to lend	2,000	$ 14,000
Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	351,593		159,726
Total nonaccrual loans included above	31,559		29,925
30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	42,955		9,446
Total nonaccrual loans included above	400		3,608
90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	51,696		8,908
Total nonaccrual loans included above	51,696		8,908
Commercial Lending
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	394,764		151,590
Commercial Lending | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	316,281		146,467
Commercial Lending | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	30,510		3,608
Commercial Lending | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	47,973		1,515
Commercial Lending | C&I
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	207,935		85,270
Commercial Lending | C&I | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	178,896		80,147
Commercial Lending | C&I | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	400		3,608
Commercial Lending | C&I | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	28,639		1,515
Commercial Lending | CRE
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	157,892		66,040
Commercial Lending | CRE | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	127,782		66,040
Commercial Lending | CRE | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	30,110		0
Commercial Lending | CRE | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	0		0
Commercial Lending | Construction and land
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	28,937
Commercial Lending | Construction and land | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	9,603
Commercial Lending | Construction and land | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	0
Commercial Lending | Construction and land | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	19,334
Commercial Lending | Multifamily residential
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated			280
Commercial Lending | Multifamily residential | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated			280
Commercial Lending | Multifamily residential | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated			0
Commercial Lending | Multifamily residential | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated			0
Consumer Lending
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	51,480		26,490
Consumer Lending | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	35,312		13,259
Consumer Lending | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	12,445		5,838
Consumer Lending | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	3,723		7,393
Consumer Lending | Single-family residential (“SFR”)
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	34,710		15,188
Consumer Lending | Single-family residential (“SFR”) | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	22,385		8,122
Consumer Lending | Single-family residential (“SFR”) | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	8,602		3,469
Consumer Lending | Single-family residential (“SFR”) | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	3,723		3,597
Consumer Lending | HELOCs
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	16,770		11,302
Consumer Lending | HELOCs | Current Accruing Loans
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	12,927		5,137
Consumer Lending | HELOCs | 30 - 89 Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	3,843		2,369
Consumer Lending | HELOCs | 90+ Days Past Due
Financing Receivable Allowance for Credit Losses
Financing receivable, modified, accumulated	$ 0		$ 3,796