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RELATED-PARTY TRANSACTIONS - Current Related Party Indemnification Costs (Details) - Special Committee Investigation - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Jonah F. Schnel | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | $ 511 |  | $ 854
Robert Sznewajs | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 511 |  | 854
Richard Lashley | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 497 |  |
Steven A. Sugarman | Former President And Chief Executive Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 198 | $ 11,900 | 8,500
Francisco A. Turner | Former Interim Chief Financial Officer and Chief Strategy Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 1,100 |  |
Hugh Boyle | Former Interim Chief Financial Officer And Chief Strategy Officer And Former Chief Financial Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 497 |  |
Emeritus John Grosvenor | Former General Counsel |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 544 | 879 | 415
Halle J. Benett | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | 511 |  |
Halle J. Benett | Former Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  |  | 854
Francisco A. Turner and James J. McKinney | Former Interim Chief Financial Officer And Chief Strategy Officer And Former Chief Financial Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | 795 | 400
Cynthia Abercrombie | Former Bank Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | $ 180 | 292
Jeffrey T. Seabold | Former Management Vice Chair |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  |  | 497
Jeffrey Karish | Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  |  | $ 854
Jeffrey Karish | Former Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | $ 511 |  |

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