Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables present our assets and liabilities measured at fair value on a recurring basis (in thousands):

	Fair Value Measurements on a Recurring Basis as of
	June 30, 2021
Fair value measurements in:	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	637,048	$	—	$	—	$	637,048
Total	$	637,048	$	—	$	—	$	637,048

	Fair Value Measurements on a Recurring Basis as of
	December 31, 2020
Fair value measurements in:	Level 1		Level 2		Level 3		Total
Assets:
Money market accounts	$	221,407	$	—	$	—	$	221,407
Total	$	221,407	$	—	$	—	$	221,407

Summary of Fair Value of Level 3 Liability

The following table summarizes the change in fair value of the Level 3 liabilities for contingent consideration liabilities from acquisitions with significant unobservable inputs (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Beginning of period balance	$	—	$	2,027	$	—	$	2,595
Changes in fair value included in earnings	—		(1,721)		—		(2,289)
End of period balance	$	—	$	306	$	—	$	306