Table:
|  |  | December 31, |  |
| --- | --- | --- | --- |
|  | Useful Lives | 2019 | 2018 |
| Computer and office equipment | 3 - 5 years | $143,942 | $129,359 |
| Leasehold improvements lease | Lesser of useful life of improvement or remaining life of lease | 33,346 | 32,096 |
| Furniture and fixtures | 7 years | 12,980 | 12,500 |
| Building and improvements | 7 - 30 years | 14,553 | 14,381 |
| Land | Non-depreciable | 1,785 | 1,785 |
| Property and equipment, gross |  | 206,606 | 190,121 |
| Less: accumulated depreciation |  | (136,226 ) | (117,392 ) |
| Property and equipment, net |  | $ 70,380 | $ 72,729 |
Paragraphs:
Property and Equipment
Property and equipment are stated at cost. Depreciation of these assets is generally computed using the straight-line method over their estimated useful lives based on asset class. As of December 31, 2019 and 2018, net property and equipment consisted of the following (in thousands):
Question:
How was depreciation of the assets generally computed by the company?
Answer: using the straight-line method over their estimated useful lives based on asset class.