Business	12 Months Ended
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. BUSINESS The consolidated financial statements include the accounts of CVB Financial Corp. (referred to herein on an unconsolidated basis as “CVB” and on a consolidated basis as “we,” “our” or the “Company”) and its wholly owned subsidiary: Citizens Business Bank (the “Bank” or “CBB”) after elimination of all intercompany transactions and balances. The Company has one inactive subsidiary, Chino Valley Bancorp. The Company is also the common stockholder of CVB Statutory Trust III. CVB Statutory Trust III was created in January 2006 to issue trust preferred securities in order to raise capital for the Company. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 810, Consolidation, this trust does not meet the criteria for consolidation. The Company’s primary operations are related to traditional banking activities. This includes the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides trust and investment-related services to customers through its CitizensTrust Division. The Bank’s customers consist primarily of small to mid-sized businesses and individuals located in San Bernardino County, Riverside County, Los Angeles County, Orange County, San Diego County, Ventura County, Santa Barbara, and the Central Valley area of California. The Bank operates 40 Business Financial Centers, eight Commercial Banking Centers, and three trust offices. The Company opened a new Commercial Banking Center in Santa Barbara in January 2016. The Company is headquartered in the city of Ontario, California. On October 14, 2015, we announced that we have entered into a merger agreement with County Commerce Bank, pursuant to which County Commerce Bank will merge into Citizens Business Bank when the transaction closes. County Commerce Bank is headquartered in Ventura County with four branch locations in Ventura County with total assets of approximately $250 million. This acquisition would extend our geographic footprint northward into the central coast of California. We expect to close this announced acquisition in the first quarter of 2016.

1. BUSINESS

The consolidated financial statements include the accounts of CVB Financial Corp. (referred to herein on an unconsolidated basis as “CVB” and on a consolidated basis as “we,” “our” or the “Company”) and its wholly owned subsidiary: Citizens Business Bank (the “Bank” or “CBB”) after elimination of all intercompany transactions and balances. The Company has one inactive subsidiary, Chino Valley Bancorp. The Company is also the common stockholder of CVB Statutory Trust III. CVB Statutory Trust III was created in January 2006 to issue trust preferred securities in order to raise capital for the Company. In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 810, Consolidation, this trust does not meet the criteria for consolidation.

The Company’s primary operations are related to traditional banking activities. This includes the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides trust and investment-related services to customers through its CitizensTrust Division. The Bank’s customers consist primarily of small to mid-sized businesses and individuals located in San Bernardino County, Riverside County, Los Angeles County, Orange County, San Diego County, Ventura County, Santa Barbara, and the Central Valley area of California. The Bank operates 40 Business Financial Centers, eight Commercial Banking Centers, and three trust offices. The Company opened a new Commercial Banking Center in Santa Barbara in January 2016. The Company is headquartered in the city of Ontario, California.

On October 14, 2015, we announced that we have entered into a merger agreement with County Commerce Bank, pursuant to which County Commerce Bank will merge into Citizens Business Bank when the transaction closes. County Commerce Bank is headquartered in Ventura County with four branch locations in Ventura County with total assets of approximately $250 million. This acquisition would extend our geographic footprint northward into the central coast of California. We expect to close this announced acquisition in the first quarter of 2016.