Loans and Allowance for Credit Losses - Schedule of Geographic And Collateral Type Concentration (Details) - Financing Receivable	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	100.00%	100.00%
Collateral Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	100.00%	100.00%
Collateral Concentration Risk \| Multi-family
Concentration Risk [Line Items]
Concentration risk (in percent)	49.90%	56.60%
Collateral Concentration Risk \| SBA loans
Concentration Risk [Line Items]
Concentration risk (in percent)	24.40%	20.10%
Collateral Concentration Risk \| Land
Concentration Risk [Line Items]
Concentration risk (in percent)	5.60%	4.30%
Collateral Concentration Risk \| Retail
Concentration Risk [Line Items]
Concentration risk (in percent)	5.40%	4.70%
Collateral Concentration Risk \| Industrial
Concentration Risk [Line Items]
Concentration risk (in percent)	4.70%	4.00%
Collateral Concentration Risk \| Office
Concentration Risk [Line Items]
Concentration risk (in percent)	3.20%	3.20%
Collateral Concentration Risk \| Mixed Use
Concentration Risk [Line Items]
Concentration risk (in percent)	2.60%	3.00%
Collateral Concentration Risk \| Other
Concentration Risk [Line Items]
Concentration risk (in percent)	4.20%	4.10%
Texas \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	25.40%	25.80%
California \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	11.00%	12.70%
Arizona \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	10.40%	9.20%
Florida \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	7.60%	8.90%
Georgia \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	5.80%	6.00%
New York \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	4.20%	3.70%
Washington \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	3.80%	3.10%
North Carolina \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	2.20%	2.00%
Ohio \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	2.20%	1.80%
New Jersey \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	2.20%	1.80%
Other \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percent)	25.20%	25.00%