Cash, Cash Equivalents and Restricted Cash

12 Months Ended

Dec. 31, 2018

Short-Term Investments And Fair Value Measurement [Abstract]

Cash, Cash Equivalents and Restricted Cash

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

Non-current assets include restricted cash related to workers compensation deposits and letter of credit agreements. Balances as of December 31, 2018 are included in cash, cash equivalents, and restricted cash on the Consolidated Statements of Cash Flows. Foreign time deposits of $301 million, classified as Level 2 securities, were included in Cash and cash equivalents on the Company's Balance Sheet as of December 31, 2017.

In July 2017, the Company sold all short-term investments. There were no material gross realized gains or losses in the years ended December 31, 2018, 2017 and 2016, respectively.

See Note 4 to the consolidated financial statements for further information regarding the fair value of the Company’s senior notes.