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SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Changes in Allowance for Uncollectible Trade Accounts Receivables | Changes in this allowance for 2020, 2019 and 2018 were as follows (in thousands):
| Years Ended December 31, |
| 2020 |  | 2019 |  | 2018 |
Balance at beginning of year | $ | 8,929 |  |  | $ | 10,126 |  |  | $ | 9,015 |  |
Charged to costs and expenses | 1,194 |  |  | 139 |  |  | 2,368 |  |
Charged to other accounts | 21 |  | (1) | 79 |  | (1) | (86) |  | (2)
Deductions | (1,516) |  | (3) | (1,415) |  | (3) | (1,171) |  | (3)
Balance at end of year | $ | 8,628 |  |  | $ | 8,929 |  |  | $ | 10,126 |  |
(1) Primarily due to translation adjustments (2) Includes allowance for doubtful accounts from acquisitions and divestiture (3) Uncollectible accounts written off, net of recoveries
Schedule of Principal Estimated Useful Lives of Property and Equipment | 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 allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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