Cash, Cash Equivalents and Restricted Cash (Tables)

12 Months Ended

Dec. 31, 2018

Short-Term Investments And Fair Value Measurement [Abstract]

Schedule of Cash and Cash Equivalents

The following table summarizes the Company's cash, cash equivalents and restricted cash as of December 31, 2018 and 2017:

	As of December 31, 2018
	Cash and cash equivalents		Non-current Assets		Total
	(in thousands)
Cash	$	2,572,685	$	16,260	$	2,588,945
Level 1 securities:
Money market funds	1,221,798		1,298		1,223,096
	$	3,794,483	$	17,558	$	3,812,041

	As of December 31, 2017
	Cash and cash equivalents		Non-current Assets		Total
	(in thousands)
Cash	$	2,072,296	$	4,367	$	2,076,663
Level 1 securities:
Money market funds	449,734		1,276		451,010
Level 2 securities:
Time Deposits	300,765		—		300,765
	$	2,822,795	$	5,643	$	2,828,438