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Acquisition - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) |  | 2 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 21, 2021 | Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loans |  |  | $ 8,872,601,000 | $ 7,088,264,000 |
Goodwill |  |  | 365,164,000 | 260,567,000 | $ 210,344,000
Goodwill Acquired Through Acquisition |  |  | 104,597,000 | $ 50,223,000 |
Common stock consideration |  |  | 342,280 |  |
Shares withheld on the settlement of share-based awards |  |  | 1,370 |  |
First Choice Bancorp |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 214,794,000 |  | 214,794,000 |  |
Adjustments, Cash |  | $ 0 |  |  |
Securities | 34,533,000 |  | 34,489,000 |  |
Adjustments, Securities |  | (44,000) |  |  |
Loans | 1,937,635,000 |  |  |  |
Allowance | (19,626,000) |  |  |  |
Other investments | 19,178,000 |  | 19,316,000 |  |
Adjustments, Other Invesments |  | 138,000 |  |  |
Fixed assets | 1,869,000 |  | 999,000 |  |
Adjustments, Fixed Assets |  | (870,000) |  |  |
Accrued interest receivable | 7,131,000 |  | 7,151,000 |  |
Adjustments, Accrued Interest Receivable |  | 20,000 |  |  |
Goodwill | 73,425,000 |  |  |  |
Adjustments, Goodwill |  | (73,425,000) |  |  |
goodwill elimination balance |  |  | 0 |  |
Intangible assets | 4,517,000 |  | 4,892,000 |  |
Adjustments, Intangible Assets |  | 375,000 |  |  |
Deferred tax assets | 7,558,000 |  | 5,615,000 |  |
Adjustments, Deferred Tax Assets |  | (1,943,000) |  |  |
Other assets | 23,024,000 |  | 24,669,000 |  |
Adjustments, Other Assets |  | 1,645,000 |  |  |
Total assets acquired | 2,304,038,000 |  | 2,248,062,000 |  |
Adjustments, Total Assets Acquired |  | (55,976,000) |  |  |
Deposits assumed | 1,840,716,000 |  | 1,840,429,000 |  |
Adjustments, Deposits |  | (287,000) |  |  |
FHLB advances | 160,000,000 |  | 160,000,000 |  |
Adjustments, FHLB advances |  | 0 |  |  |
Accrued interest payable | 124,000 |  | 124,000 |  |
Adjustments, Accrued interest payable |  | 0 |  |  |
Other liabilities | 8,464,000 |  | 6,304,000 |  |
Adjustments, other liabilities |  | (2,160,000) |  |  |
Total liabilities assumed | 2,009,304,000 |  | 2,006,857,000 |  |
Adjustments, Total liabilities assumed |  | (2,447,000) |  |  |
Net assets acquired | 294,734,000 |  | 241,205,000 |  |
Adjustments, Net assets acquired |  | $ (53,529,000) |  |  |
Cash |  |  | 2,152,000 |  |
Common stock |  |  | 343,650,000 |  |
Total consideration paid | $ 346,000,000 |  | 345,802,000 |  |
Goodwill Acquired Through Acquisition |  |  | 104,597,000 |  |
First Choice Bancorp | Core Deposits [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Useful life | 10 years |  |  |  |
Adjustments associated with acquisition |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loans | $ 5,508,000 |  |  |  |
Adjustments, Allowance | $ 12,620,000 |  |  |  |
As Recorded by Acquiree |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loans |  |  | 1,943,143,000 |  |
Allowance |  |  | $ (7,006,000) |  |

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