Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2020

Receivables [Abstract]

Schedule of accounts receivable

Accounts receivable consist of the following at September 30, 2020 and December 31, 2019:

(in thousands)	September 30, 2020		December 31, 2019
Trade receivables	$	403,406	$	334,059
Allowance for doubtful accounts	(6,635)		(5,674)
Other allowances	(3,036)		(2,644)
	$	393,735	$	325,741

Allowance For Doubtful Accounts [Table Text Block]

The following table shows the changes in the allowance for doubtful accounts for the nine months ended September 30, 2020:

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(2,185)
Recoveries	1,247
Increase in allowance	1,899
Balance at September 30	$	6,635