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Schedule II - Consolidated Valuation and Qualifying Accounts (Details 2) - Allowance for doubtful accounts [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for doubtful accounts: |  |  |
Balance, beginning of period | $ 8,850 | $ 8,069 | $ 10,479
Charged to costs and expenses | 7,864 | 7,532 | 7,024
Other | 980 | 1,121 | 989
Deductions | 9,197 | 7,872 | 10,423
Balance, end of period | $ 8,497 | $ 8,850 | $ 8,069

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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