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)