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Schedule II - Valuation And Qualifying Accounts (Details) - Allowance For Doubtful Accounts [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |
BALANCE AT BEGINNING OF PERIOD | [1],[2] | $ (253) | $ (15,175) | $ (14,236)
(CHARGED) CREDITED TO COSTS AND EXPENSES | [1],[2] | (116) | (247) | (17,376)
(CHARGED) CREDITED TO OTHER ACCOUNTS | [1],[2] |  | (1,436) | (1,360)
DEDUCTIONS | [1],[2],[3] | 16 | 16,605 | 17,797
BALANCE AT END OF PERIOD | [1],[2] | $ (353) | $ (253) | $ (15,175)
[1] | Beginning on January 1, 2018, in accordance with ASU 2014-09, Revenue with Contracts with Customers, revenue reductions resulting from implicit price concessions are recorded as a net reduction in accounts receivable. The remaining allowance for doubtful accounts relates to amounts deemed uncollectible due to an adverse change in our customer’s ability to pay. See Footnote 2 to the Company’s Consolidated Financial Statements for a full description.
[2] | Classified in consolidated balance sheets as a reduction of accounts receivable.
[3] | With respect to allowances for doubtful accounts, deductions include accounts considered uncollectible or written off, payments companies divested, etc.

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