SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2020

For the years ended December 31, 2020, 2019 and 2018:


			Additions
(in thousands)	Balance at Beginning of Period		Charged to Expenses		Charged to Other Accounts Note (1)		Deductions Note (2)		Balance at End of Period

Deductions from asset accounts:

Allowance for doubtful accounts and expected credit losses:

Year 2020	$	4,472	$	2,229	$	—	$	1,120	$	5,581
Year 2019	10,883		720		(70)		7,061		4,472
Year 2018	10,579		2,830		(7)		2,519		10,883

Valuation allowance for deferred tax assets:

Year 2020	$	355,559	$	16,668	$	—	$	—	$	372,227
Year 2019	46,751		308,808		—		—		355,559
Year 2018	46,283		468		—		—		46,751

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(1) For allowance for credit losses, primarily includes amounts previously written off which were credited directly to this account when recovered.

(2) For allowance for credit losses, amounts written off as uncollectible or transferred to other accounts or utilized.