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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS | ARCHROCK, INC. SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance at |  | Charged to |  | ​ | ​ |  | Balance at
​ | ​ | Beginning | ​ | Costs and | ​ | ​ | ​ | ​ | End of
​ | ​ | of Period | ​ | Expenses | ​ | Deductions(1) | ​ | Period
Allowance for credit losses applied to accounts receivable in the balance sheet |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
December 31, 2020 | ​ | $ | 2,210 | ​ | $ | 3,525 | ​ | $ | 2,365 | ​ | $ | 3,370
December 31, 2019 | ​ |  | 1,452 | ​ |  | 2,567 | ​ |  | 1,809 | ​ |  | 2,210
December 31, 2018 | ​ |  | 1,794 | ​ |  | 1,677 | ​ |  | 2,019 | ​ |  | 1,452
(1) | Primarily represents uncollectible accounts written off and, for 2020, the impact of the adoption of ASU 2016-13 on January 1, 2020.

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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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