Allowance for Doubtful Accounts (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Allowance for Doubtful Debts

In order to provide for these collection problems and the general risk associated with the granting of credit terms, the Company recorded the following bad debt provisions (in an Allowance for Doubtful Accounts):

	Year Ended December 31,
	2019		2018		2017
	(in thousands)
Bad debt provision	$	25,480	$	51,387	$	6,250

Impaired Notes Receivable

Summary schedules of impaired notes receivable, and the related reserve, for the years ended December 31, 2019, 2018 and 2017 was as follows:

	Impaired Notes Receivable
Year Ended December 31,	Balance Beginning of Year		Additions		Deductions		Balance End of Year		Average Outstanding Balance
	(in thousands)
2019	$	25,704	$	3,763	$	4,830	$	24,637	$	27,554
2018	$	6,854	$	23,382	$	4,532	$	25,704	$	15,448
2017	$	5,685	$	1,169	$	—	$	6,854	$	6,270

	Reserve for Impaired Notes Receivable
Year Ended December 31,	Balance Beginning of Year		Additions		Deductions		Balance End of Year
	(in thousands)
2019	$	13,472	$	3,575	$	4,557	$	12,490
2018	$	2,884	$	12,526	$	1,938	$	13,472
2017	$	2,419	$	465	$	—	$	2,884