Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Schedule of accounts receivable

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

(in thousands)	March 31,   2020			December 31,   2019
Trade receivables	$	361,656		$	334,059
Allowance for doubtful accounts	(7,093		)	(5,674		)
Other allowances	(2,891		)	(2,644		)
	$	351,672		$	325,741

Allowance For Doubtful Accounts [Table Text Block]

The following table shows the changes in the allowance for doubtful accounts for the three months ended March 31, 2020:

(in thousands)	2020
Balance at January 1	$	5,674
Write-offs	(787		)
Recoveries	515
Increase in allowance	1,691
Balance at March 31	$	7,093