Subsequent Events	6 Months Ended
	Jun. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn July 27, 2021, the Company entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Valley Republic Bancorp, a California corporation (“Valley”), providing for the merger of Valley with and into the Company, with the Company as the surviving corporation. The Merger Agreement contemplates that immediately after the Merger, Valley Republic Bank, a California state-chartered bank and wholly-owned subsidiary of Valley, will merge with and into Tri Counties Bank, a California state-chartered bank and wholly-owned subsidiary of the Company, with Tri Counties Bank as the surviving bank (the “Bank Merger”). The Merger Agreement was adopted and unanimously approved by the Board of Directors of each of the Company and Valley. As of June 30, 2021, Valley had a total asset size of approximately $1.36 billion. The transaction, subject to customary regulatory approvals, is expected to close during the fourth quarter of 2021.