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PROPERTY PLANT AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2017
PROPERTY PLANT AND EQUIPMENT [ABSTRACT] |
PROPERTY, PLANT AND EQUIPMENT | (5)PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following (in thousands):
|  | December 31, |
|  | 2017 |  | 2016 |
Land and buildings |  | $ | 38,858 |  | $ | 38,868 |
Computer equipment and software |  |  | 390,899 |  |  | 364,854 |
Telephone equipment |  |  | 46,521 |  |  | 42,858 |
Furniture and fixtures |  |  | 76,856 |  |  | 68,248 |
Leasehold improvements |  |  | 176,467 |  |  | 162,232 |
Motor vehicles |  |  | 158 |  |  | 143 |
Construction-in-progress and other |  |  | 220 |  |  | 115 |
Property, plant and equipment, gross |  |  | 729,979 |  |  | 677,318 |
Less: Accumulated depreciation and amortization |  |  | (566,682) |  |  | (526,281) |
Property, plant and equipment, net |  | $ | 163,297 |  | $ | 151,037 |
Depreciation and amortization expense for property, plant and equipment was $57.0 million, $59.1 million and $54.0 million for the years ended December 31, 2017, 2016 and 2015, respectively. Included in the computer equipment and software is internally developed software of $8.5 million net and $10.1 million net as of December 31, 2017 and 2016, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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