Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Summary of changes in the allowance for doubtful accounts and sales allowances

The following table summarizes the changes in the allowance for doubtful accounts and sales allowances (in thousands):

	Three Months Ended March 31,
	2021		2020
Allowances, at beginning of period	$	7,147	$	6,591
Charged as a reduction of revenue	1,279		2,398
Charged to bad debt expense in general and administrative expenses	232		2,225
Write-offs, net of recoveries	(2,509)		(3,327)
Allowances, at end of period	$	6,149	$	7,887