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Schedule II-Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2018
Valuation And Qualifying Accounts [Abstract] |
Schedule Of Valuation And Qualifying Accounts | SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (amounts in thousands)
|  | Balance at |  |  | Charges to |  |  |  |  |  |  | Write-off of |  |  | Balance |
|  | beginning |  |  | costs and |  |  | Acquisitions |  |  | uncollectible |  |  | at end |
Valuation Allowance for Deferred Tax Assets: |  | of period |  |  | expenses |  |  | of business |  |  | accounts |  |  | of period |
Year ended December 31, 2018 |  | $ | 70,227 |  |  | $ | 9,037 |  |  | $ | - |  |  | $ | - |  |  | $ | 79,264 |
Year ended December 31, 2017 |  | $ | 56,333 |  |  | $ | 13,894 |  |  | $ | - |  |  | $ | - |  |  | $ | 70,227 |
Year ended December 31, 2016 |  | $ | 52,567 |  |  | $ | 3,766 |  |  | $ | - |  |  | $ | - |  |  | $ | 56,333 |
|  | Balance at |  |  | Charges to |  |  |  |  |  |  |  |  |  |  | Balance |
|  | beginning |  |  | costs and |  |  | Acquisitions |  |  |  |  |  |  | at end |
Allowance for Doubtful Accounts Receivable: |  | of period |  |  | expenses |  |  | of business |  |  | Write-offs |  |  | of period |
Year ended December 31, 2017 (a) |  | $ | 410,374 |  |  | $ | 869,077 |  |  | $ | - |  |  | $ | (799,162 | ) |  | $ | 480,289 |
Year ended December 31, 2016 |  | $ | 398,797 |  |  | $ | 741,578 |  |  | $ | - |  |  | $ | (730,001 | ) |  | $ | 410,374 |
(a) Effective January 1, 2018, the Company adopted ASC 606 using a modified retrospective approach. This schedule discloses allowance for doubtful accounts receivable for periods reported under ASC 605 only.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: 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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- References No definition available. + Details
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