Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

Schedule of accounts receivable

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

(in thousands)	June 30, 2020		December 31, 2019
Trade receivables	$	371,848	$	334,059
Allowance for doubtful accounts	(7,155)		(5,674)
Other allowances	(2,740)		(2,644)
	$	361,953	$	325,741

Allowance For Doubtful Accounts [Table Text Block]

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

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(1,952)
Recoveries	821
Increase in allowance	2,612
Balance at June 30	$	7,155