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Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Basis of Presentation and Significant Accounting Policies |
Summary of changes in the allowance for credit losses balance | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(in thousands) | ​ | 2021 |  | 2020 |  | 2019
Balance at beginning of period |  | $ | 3,370 |  | $ | 2,210 |  | $ | 1,452
Impact of adoption of ASU 2016-13 on January 1, 2020 | ​ | ​ | — | ​ | ​ | (216) | ​ | ​ | —
Provision for credit losses | ​ | ​ | (90) | ​ | ​ | 3,525 | ​ | ​ | 2,567
Write-offs charged against allowance | ​ | ​ | (1,128) | ​ | ​ | (2,149) | ​ | ​ | (1,809)
Balance at end of period | ​ | $ | 2,152 | ​ | $ | 3,370 | ​ | $ | 2,210
Schedule of estimated useful life of property, plant and equipment | ​
​ | ​ | ​
Compression equipment, facilities and other fleet assets |  | 3 to 30 years
Buildings | ​ | 20 to 35 years
Transportation and shop equipment | ​ | 3 to 10 years
Computer hardware and software | ​ | 3 to 5 years
Other | ​ | 3 to 10 years

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- Definition Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References No definition available. + Details
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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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