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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
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.