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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2021
Valuation and Qualifying Accounts [Abstract]  
Schedule II Valuation and Qualifying Accounts

WASTE CONNECTIONS, INC.

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

Years Ended December 31, 2021, 2020 and 2019

(in thousands of U.S. dollars)

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​

​

​

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​

​

​

​

​

​

​

​

​

​

​

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​

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Additions

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Deductions

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​

​

​

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Balance at

​

Charged to

​

Charged to

​

(Write-offs,

​

​

​

​

​

Beginning of

​

Costs and

​

Other

​

Net of

​

Balance at End

Description

    

Year

    

Expenses

    

Accounts

    

Collections)

    

of Year

Allowance for Credit Losses:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Year Ended December 31, 2021

​

$

19,380

​

$

9,727

​

$

—

​

$

(10,627)

​

$

18,480

Year Ended December 31, 2020

​

$

16,432

​

$

15,546

​

$

—

​

$

(12,598)

​

$

19,380

Year Ended December 31, 2019

​

$

16,760

​

$

11,973

​

$

—

​

$

(12,301)

​

$

16,432

​