Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Cash, Cash Equivalents and Investments

The following table provides cash and cash equivalents, and short- and long-term investments within the Consolidated Balance Sheets as of the dates indicated (in thousands):

	As of December 31,
	2019		2018
Cash and cash equivalents	$	443,293	$	366,985
Short-term investments	373,959		257,302
Long-term investments	89,343		—
Total cash, cash equivalents, and short- and long-term investments	$	906,595	$	624,287

Schedule of Allowance Activity

The following table summarizes the allowance activity during the periods indicated (in thousands):

	Year Ended   December 31,
	2019			2018			2017
Balance as of the beginning of period	$	4,720		$	2,687		$	1,999
Bad debt expense	10,963			4,124			2,497
Write-offs, net of recoveries and other adjustments	(10,650		)	(2,091		)	(1,809		)
Balance as of the end of period	$	5,033		$	4,720		$	2,687