Subsequent Events	9 Months Ended
Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Quarterly Cash Dividend On October 23, 2020, the Corporation’s Board of Directors declared a cash dividend of $0.28 per share, payable on November 13, 2020 to shareholders of record on November 6, 2020. Branch Consolidations On October 5, 2020, the Bank completed the client account and computer system conversion for the Opus acquisition. At the same time, as a result of the Opus acquisition, the Bank consolidated twenty (20) branch offices primarily in California, Washington, and Arizona into nearby branch offices with minimal disruption to clients and daily operations. The consolidated branches were identified largely based on the proximity of neighboring branches, historic growth, and market opportunity to improve further the overall efficiency of operations in line with the Bank's ongoing cost reduction initiatives. Following the branch consolidations, the Bank operates 65 branches in major metropolitan markets in California, Washington, Oregon, Arizona, and Nevada.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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