Cash, Cash Equivalents and Restricted Cash

9 Months Ended

Sep. 30, 2018

Short-Term Investments And Fair Value Measurement [Abstract]

Cash, Cash Equivalents and Restricted Cash

Cash, Cash Equivalents and Restricted Cash

	As of September 30, 2018
	Cash and cash equivalents		Non-current Assets (1)		Total
	(in thousands)
Cash	$	2,501,504	$	9,739	$	2,511,243
Level 1 securities:
Money market funds	566,030		1,291		567,321
	$	3,067,534	$	11,030	$	3,078,564

	As of December 31, 2017
	Cash and cash equivalents		Non-current Assets (1)		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

(1) Restricted cash related to workers compensation deposits and letter of credit agreements. Balance as of September 30, 2018 is included in cash, cash equivalents, and restricted cash on the Consolidated Statements of Cash Flows.

There were no material gross realized gains or losses in the three and nine months ended September 30, 2018 and 2017, respectively.