Business	12 Months Ended
Dec. 31, 2014
Accounting Policies [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 subsidiaries: 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 ASC 810 Consolidation (previously Financial Accounting Standards Board (“FASB”) Interpretation No. 46R “Consolidation of Variable Interest Entities”), this trust does not meet the criteria for consolidation. The Company’s primary operations are related to traditional banking activities, including the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides automobile and equipment leasing to customers through its Citizens Financial Services Group and 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, Madera County, Fresno County, Tulare County and Kern County, California. The Bank operates 40 Business Financial Centers, six Commercial Banking Centers, and three trust office locations. The Company is headquartered in the city of Ontario, California. On May 15, 2014, we acquired American Security Bank (“ASB”), a Newport Beach, CA headquartered regional bank with approximately $433 million in total assets and five branch locations throughout Orange County, San Bernardino County, and Los Angeles County. Our consolidated financial statements for 2014 include ASB operations, post-merger. In the latter half of the third quarter of 2014, we converted the ASB core operating system into the CBB application infrastructure, consolidated branch locations, and closed two electronic banking vestibules. See Note 4 — Business Combinations, included herein.

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 subsidiaries: 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 ASC 810 Consolidation (previously Financial Accounting Standards Board (“FASB”) Interpretation No. 46R “Consolidation of Variable Interest Entities”), this trust does not meet the criteria for consolidation.

The Company’s primary operations are related to traditional banking activities, including the acceptance of deposits and the lending and investing of money through the operations of the Bank. The Bank also provides automobile and equipment leasing to customers through its Citizens Financial Services Group and 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, Madera County, Fresno County, Tulare County and Kern County, California. The Bank operates 40 Business Financial Centers, six Commercial Banking Centers, and three trust office locations. The Company is headquartered in the city of Ontario, California.

On May 15, 2014, we acquired American Security Bank (“ASB”), a Newport Beach, CA headquartered regional bank with approximately $433 million in total assets and five branch locations throughout Orange County, San Bernardino County, and Los Angeles County. Our consolidated financial statements for 2014 include ASB operations, post-merger. In the latter half of the third quarter of 2014, we converted the ASB core operating system into the CBB application infrastructure, consolidated branch locations, and closed two electronic banking vestibules. See Note 4 — Business Combinations, included herein.