Acquisition - Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 21, 2021 USD ($) office $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Share Price | $ / shares	$ 44.01
First Choice Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Banking Offices | office	8
Business Acquisition, Equity Interest Issued or Issuable Per Acquired Share	0.6603
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	7,800,000
Value of transaction	$ 346,000		$ 345,802
Amount payable to FCB stock option holders	$ 2,100
Merger-related costs		$ 14,700	16,600
Total revenue from First Choice Bancorp			18,100
Pre-tax net income from First Choice Bancorp			11,200
Provision for credit losses			$ 25,400