Allowance for Credit Losses

3 Months Ended

Mar. 31, 2021

The following table sets forth the Company's allowance for credit losses (in thousands):


	2021		2020
Balance as of January 1	$	33,368	$	26,828
Sensis acquisition, balance as of March 1, 2021	2,733		—
Additions (1)	2,018		10,588
Deductions (2)	(3,318)		(3,630)
Balance as of March 31 (3)	$	34,801	$	33,786

(1) For the three months ended March 31, 2021 and 2020, represents provision for bad debt expense of $2.0 million and $10.6 million, respectively, which is included in General and administrative expense.

(2) For the three months ended March 31, 2021 and 2020, represents amounts written off as uncollectible, net of recoveries.

(3) As of March 31, 2021, $34.6 million of the allowance is attributable to Accounts receivable and $0.2 million is attributable to Contract assets. As of March 31, 2020, $33.5 million of the allowance is attributable to accounts receivable and $0.3 million is attributable to contract assets.

The Company’s exposure to expected credit losses depends on the financial condition of its clients and other macroeconomic factors. The Company maintains an allowance for credit losses based upon its estimate of potential credit losses. This allowance is based upon historical and current client collection trends, any identified client-specific collection issues, and current as well as expected future economic conditions and market trends. The economic downturn caused by COVID-19 resulted in an incremental amount of $3.1 million recorded to allowance for credit losses for the three months ended March 31, 2020. No incremental impact was recorded for the three months ended March 31, 2021.