Fair Value of Financial Instruments - Schedule of Fair Value Hierarchy and Fair Value of Assets that Were Still Held and Had Fair Value Adjustments Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
Impaired loans	$ 1,839,133	$ 1,793,258
Quoted Prices in Active Markets (Level 1)
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Significant Other Observable Inputs (Level 2)
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Significant Unobservable Inputs (Level 3)
Financing Receivable Impaired [Line Items]
Impaired loans	1,839,133	1,793,258
Nonrecurring
Financing Receivable Impaired [Line Items]
Impaired loans	2,669	1,432
Nonrecurring | SBA—real estate
Financing Receivable Impaired [Line Items]
Impaired loans	1,432	1,432
Nonrecurring | OREO
Financing Receivable Impaired [Line Items]
Impaired loans	1,237
Nonrecurring | Quoted Prices in Active Markets (Level 1)
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Nonrecurring | Quoted Prices in Active Markets (Level 1) | SBA—real estate
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Nonrecurring | Quoted Prices in Active Markets (Level 1) | OREO
Financing Receivable Impaired [Line Items]
Impaired loans
Nonrecurring | Significant Other Observable Inputs (Level 2)
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | SBA—real estate
Financing Receivable Impaired [Line Items]
Impaired loans	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | OREO
Financing Receivable Impaired [Line Items]
Impaired loans
Nonrecurring | Significant Unobservable Inputs (Level 3)
Financing Receivable Impaired [Line Items]
Impaired loans	2,669	1,432
Nonrecurring | Significant Unobservable Inputs (Level 3) | SBA—real estate
Financing Receivable Impaired [Line Items]
Impaired loans	1,432	$ 1,432
Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO
Financing Receivable Impaired [Line Items]
Impaired loans	$ 1,237