This excerpt taken from the CVBF 10-Q filed Aug 8, 2007.
Premises and Equipment - Premises and equipment are stated at cost, less accumulated depreciation, which is provided for in amounts sufficient to relate the cost of depreciable assets to operations over their estimated service lives using the straight-line method. Properties under capital lease and leasehold improvements are amortized over the shorter of estimated economic lives of 15 years or the initial terms of the leases. Estimated lives are 3 to 5 years for computer and equipment, 5 to 7 years for furniture, fixtures and equipment, and 15 to 40 years for buildings and improvements. Long-lived assets are reviewed periodically for impairment when events or changes in circumstances indicate that the carrying amount may not be recoverable. The impairment is calculated as the difference between the fair value of acquired assets and liabilities, and its carrying value. The impairment loss, if any, would be recorded in noninterest expense.