Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Allowance for Doubtful Accounts Rollforward

The changes in the allowance for doubtful accounts during the nine months ended September 30, 2020 were as follows:

(in thousands)	Nine Months Ended September 30, 2020
Beginning balance – January 1	$	8,700
Additions: Charges to costs and expenses	5,799
Deductions: Returns and write-offs	(1,099)
Ending balance – September 30	$	13,400

Cash and Cash Equivalents

Our cash and cash equivalents balances comprise the following:

	September 30, 2020			December 31, 2019
(in thousands, except percentages)	Amount		% of Total	Amount		% of Total
Cash accounts	$	536,778	63.5	$	549,639	63.0
Money market funds	307,963		36.5	322,455		37.0
Total	$	844,741		$	872,094