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v3.21.2

SUBSEQUENT EVENTS (Details) $ / shares in Units, $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Oct. 18, 2021 USD ($) $ / shares shares | Sep. 30, 2021 USD ($) tradingDay branch | Dec. 31, 2020 USD ($)
Subsequent Event [Line Items] |  |  |
Number of trading days | tradingDay |  | 20 |
Loans receivable |  | $ 6,228,575 | $ 5,898,405
Total assets |  | 8,278,741 | 7,877,334
Deposits |  | 6,543,225 | $ 6,085,800
Pacific Mercantile Bancorp (“PMB”) |  |  |
Subsequent Event [Line Items] |  |  |
Loans receivable |  | 982,400 |
Total assets |  | 1,490,000 |
Deposits |  | 1,290,000 |
Pacific Mercantile Bancorp (“PMB”) | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Exchange ratio | 0.5 |  |
Common Stock | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Closing price of BOC's common stock (in USD per share) | $ / shares | $ 18.74 |  |
Pacific Mercantile Bancorp (“PMB”) |  |  |
Subsequent Event [Line Items] |  |  |
Pro forma purchase adjustments |  | $ 9,800,000 |
Number of full services branches | branch |  | 33 |
Pacific Mercantile Bancorp (“PMB”) | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Stock consideration | $ 222,200 |  |
Cash paid at closing | 3,200 |  |
Aggregate purchase price | $ 225,400 |  |
Pacific Mercantile Bancorp (“PMB”) | Common Stock | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
BOC common stock shares issued (in shares) | shares | 11,856,713 |  |

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