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SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2017
SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES [Abstract] |
Schedule of Changes in Allowance | Changes in this allowance for 2017, 2016 and 2015 were as follows (in thousands):
|  | Years Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Balance at beginning of year |  | $ | 8,160 |  |  | $ | 9,364 |  |  | $ | 8,713 |
Charged to costs and expenses |  |  | 3,367 |  |  |  | 180 |  |  |  | 2,014 |
Charged to other accounts |  |  | 22 | 3 |  |  | (17 | )2 |  |  | 1,255 | 2
Deductions |  |  | (2,534 | )1 |  |  | (1,367 | )1 |  |  | (2,618 | )1
Balance at end of year |  | $ | 9,015 |  |  | $ | 8,160 |  |  | $ | 9,364 |
(1) Uncollectible accounts written off, net of recoveries (2) Includes allowance for doubtful accounts from acquisitions and divestiture (3) Primarily due to translation adjustments
Principal Estimated Useful Lives Used in Determining Depreciation | The principal estimated useful lives used in determining depreciation are as follows:
Buildings | 20-39 years
Building improvements | 10-20 years
Furniture, fixtures and equipment | 3-20 years
Leasehold improvements | Shorter of estimated useful life or related lease term

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- Definition Tabular disclosure of the useful life of physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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