This excerpt taken from the CVBF 10-Q filed Aug 8, 2007.
Goodwill and Intangible Assets: We have acquired entire banks and branches of banks. Those acquisitions accounted for under the purchase method of accounting have given rise to goodwill and intangible assets. We record the assets acquired and liabilities assumed at their fair value. These fair values are arrived at by use of internal and external valuation techniques. The excess purchase price is allocated to assets and liabilities respectively, resulting in identified intangibles. The identified intangibles are amortized over the estimated lives of the assets or liabilities. Any excess purchase price after this allocation results in goodwill. Goodwill is tested on an annual basis for impairment.