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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | Valuation and Qualifying Accounts The Company maintains an allowance for losses that is comprised of a bad debt allowance and, through December 31, 2017, a revenue reserve. The table below summarizes the activity in the Company’s allowance for losses for the years ended December 31 (in thousands).
| Balance at Beginning of Year |  | Additions Charged to Expense |  | Deductions from the Reserve |  | Reclassification to Accounts Payable and Accrued Liabilities (1) |  | Balance at End of Year
2020 | $ | 8,000 |  |  | $ | 16,000 |  |  | $ | (14,000) |  |  | $ | — |  |  | $ | 10,000 |
2019 | $ | 7,700 |  |  | $ | 14,000 |  |  | $ | (13,700) |  |  | $ | — |  |  | $ | 8,000 |
2018 | $ | 12,700 |  |  | $ | 12,500 |  |  | $ | (11,300) |  |  | $ | (6,200) |  |  | $ | 7,700 |
(1) The allowance for losses at December 31, 2017 included $6.2 million that was attributable to the Company’s revenue reserve. As a result of the Company’s adoption of ASC 606 on January 1, 2018, the revenue reserve balance is now included in Accounts payable and accrued liabilities on the Consolidated Balance Sheets. Note 9 — Revenue and Related Matters provides additional information regarding the Company’s adoption of ASC 606.

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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=120395691&loc=d3e24092-122690 + Details
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