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Mergers and Acquisitions - Pro Forma Combined Condensed Consolidated Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Brand Mortgage Group, LLC |  |
Business Acquisition [Line Items] |  |
Interest income |  | $ 357
Interest expense |  | 279
Net interest income |  | 78
Noninterest income |  | 4,043
Noninterest expense |  | 4,398
Net loss before taxes |  | (277)
Metropolitan Bancgroup, Inc. |  |
Business Acquisition [Line Items] |  |
Net interest income | $ 443,657 | 455,513
Noninterest income | 153,254 | 153,850
Noninterest expense | 374,174 | 452,699
Net loss before taxes | $ 167,596 | $ 115,646
Earnings per share - pro forma: |  |
Basic (usd per share) | $ 2.89 | $ 1.97
Diluted (usd per share) | $ 2.88 | $ 1.97

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