Cash, Cash Equivalents and Restricted Cash (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018:

	As of March 31, 2019
	Cash and cash equivalents		Non-current Assets		Total
	(in thousands)
Cash	$	2,384,999	$	20,234	$	2,405,233
Level 1 securities:
Money market funds	963,558		1,306		964,864
	$	3,348,557	$	21,540	$	3,370,097

	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