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OVERVIEW AND BASIS OF PRESENTATION (TABLES) | 12 Months Ended
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Dec. 31, 2017
OVERVIEW AND BASIS OF PRESENTATION [Abstract] |
Schedule of property, plant and equipment useful lives | Depreciation and amortization are computed on the straight-line method based on the following estimated useful lives:
Building |  | 30 years
Computer equipment and software |  | 3 to 7 years
Telephone equipment |  | 4 to 7 years
Furniture and fixtures |  | 5 years
Leasehold improvements |  | Lesser of economic useful life (typically 10 years) or original lease term
Other |  | 3 to 7 years

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- Definition Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References No definition available. + Details
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- References No definition available. + Details
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