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Subordinated debentures
12 Months Ended
Dec. 31, 2021
Subordinated Borrowing [Line Items]  
Subordinated Borrowings Disclosure [Text Block] Subordinated Debentures
On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $35.0 million in aggregate principal amount of fixed-to-floating rate subordinated debentures. These debentures were callable at par on June 30, 2021 and were fully redeemed in December 2021.
On October 1, 2021, with its acquisition of Bank of Commerce, the Company assumed $10.0 million in aggregate principal amount of fixed-to-floating rate subordinated debentures. Interest on the subordinated debentures will be paid at a variable rate equal to three-month LIBOR plus 5.26%, payable quarterly until the maturity date of December 10, 2025.