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PROPERTY AND EQUIPMENT, NET | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
PROPERTY AND EQUIPMENT, NET |
NOTE 6 | - | PROPERTY AND EQUIPMENT, NET
| A. | Property and equipment, net consists of the following:
|  | US dollars |
|  | December 31, |
(in thousands) |  | 2017 |  |  | 2016 |
Cost : |  |  |  |  |  |
Operating equipment (*) |  |  | 52,096 |  |  |  | 48,598 |
Office furniture, equipment and computers |  |  | 33,913 |  |  |  | 26,992 |
Land |  |  | 1,022 |  |  |  | 1,022 |
Buildings |  |  | 2,205 |  |  |  | 1,888 |
Vehicles |  |  | 6,799 |  |  |  | 4,924 |
Leasehold improvements |  |  | 5,780 |  |  |  | 4,176 |
|  |  | 101,815 |  |  |  | 87,600 |
Less – accumulated depreciation and amortization (**) |  |  | (62,768 | ) |  |  | (51,956 | )
Total property and equipment, net |  |  | 39,047 |  |  |  | 35,644 |
| (*) | As December 31, 2017 and 2016, an amount of US$ 30.4million and US$ 28.6 million is subject to operating lease transactions, respectively.
| (**) | As at December 31, 2017 and 2016, an amount of US$ 15.9 million and US$ 12.5 million is subject to operating lease transactions, respectively.
| B. | In the years ended December 31, 2017, 2016 and 2015, depreciation expense was US$ 13.5 million, US$ 11.6 million and US$ 10.9 million, respectively and additional equipment was purchased in an amount of US$ 16.2 million, US$ 13.6 million and US$ 18.7 million, 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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