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Loans Receivable and Allowance for Credit Losses - Composition of Loans Held-for-Investment (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | $ 47,442,255 |  | $ 41,693,781 |  |  |
Allowance for loan losses | (582,517) | $ (563,270) | (541,579) | $ (560,404) | $ (585,724) | $ (619,983)
Loans held-for-investment, net | 46,859,738 |  | 41,152,202 |  |  |
Net deferred loan fees and net unamortized premiums | (60,300) |  | (50,700) |  |  |
Commercial and industrial (“C&I”) | CARES Act, Paycheck Protection Program |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 110,900 |  | 534,200 |  |  |
Commercial lending |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 34,314,425 |  | 30,327,746 |  |  |
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 15,625,072 |  | 14,150,608 |  |  |
Allowance for loan losses | (371,749) | (363,282) | (338,252) | (342,142) | (362,528) | (398,040)
Commercial lending | Commercial real estate (“CRE”) |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 13,573,157 |  | 12,155,047 |  |  |
Allowance for loan losses | (145,301) | (140,245) | (150,940) | (150,049) | (161,962) | (163,791)
Commercial lending | Real estate loan | Multifamily residential |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 4,559,302 |  | 3,675,605 |  |  |
Allowance for loan losses | (25,680) | (26,552) | (14,400) | (19,917) | (21,925) | (27,573)
Commercial lending | Construction and land |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 556,894 |  | 346,486 |  |  |
Allowance for loan losses | (7,506) | (6,682) | (15,468) | (22,294) | (15,643) | (10,239)
Commercial lending | Total CRE |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 18,689,353 |  | 16,177,138 |  |  |
Consumer lending |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 13,127,830 |  | 11,366,035 |  |  |
Consumer lending | Real estate loan | Single-family residential |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 10,855,345 |  | 9,093,702 |  |  |
Allowance for loan losses | (27,263) | (21,840) | (17,160) | (18,292) | (16,530) | (15,520)
Consumer lending | HELOCs |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 2,184,924 |  | 2,144,821 |  |  |
Allowance for loan losses | (3,324) | (3,220) | (3,435) | (3,392) | (2,938) | (2,690)
Consumer lending | Total residential mortgage |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 13,040,269 |  | 11,238,523 |  |  |
Consumer lending | Other consumer |  |  |  |  |  |
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Loans held-for-investment | 87,561 |  | 127,512 |  |  |
Allowance for loan losses | $ (1,694) | $ (1,449) | $ (1,924) | $ (4,318) | $ (4,198) | $ (2,130)

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