Business Combinations and Asset Acquisitions - Assets acquired and liabilities assumed (Details) - Bank of Commerce $ in Thousands	Oct. 01, 2021 USD ($)
Asset Acquisition [Line Items]
Merger consideration	$ 256,257
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	155,180
Business Acquisition, Purchase Price Allocation, Current Assets, Investment Securities	654,480
Business Acquisition, Purchase Price Allocation, FHLB Stock	7,463
Business Combination, Acquired Loans, net of allowance for credit loss	1,084,984
Business Acquisition, Purchase Price Allocation, Accrued Interest Receivable	5,237
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	17,658
Business Combination, Purchase Price Allocation, Core Deposit Intangible	15,932
Business Combination, Purchase Price Allocation, Other Assets	41,963
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	1,982,897
Business Acquisition, Purchase Price Allocation, Liabilities, Deposits	1,737,584
Business Combination, Purchase Price Allocation, Subordinated Debt	10,000
Business Combination, Purchase Price Allocation, Junior Subordinated Debentures	10,310
Business Combination, Purchase Price Allocation, Other Liabilities	26,076
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,783,970
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	198,927
Business Combination, Purchase Price Allocation, Goodwill Amount	$ 57,330