Cash, Cash Equivalents, Restricted Cash and Marketable Securities

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents, Restricted Cash and Marketable Securities

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES

Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash as of December 31, 2019 and 2018 consisted of the following (in thousands):

	December 31,
	2019		2018
Money market and demand accounts	$	757,098	$	488,733
Commercial paper	—		—
	$	757,098	$	488,733

The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of December 31, 2019 and 2018 within the consolidated balance sheets (in thousands). The Company had no restricted cash prior to 2018.

	December 31,
	2019		2018
Cash and cash equivalents	$	745,491	$	475,056
Restricted cash included within prepaid and other current assets		10,526		13,677
Restricted cash included within other non-current assets		1,081		—
Total cash, cash equivalents and restricted cash	$	757,098	$	488,733

Marketable Securities

As of December 31, 2019 and 2018, the majority of our marketable securities have been classified as available-for-sale and are carried at fair value, with unrealized gains and losses reported net-of-tax as a separate component of shareholders’ equity. Substantially all of our investments are investment-grade government and corporate debt securities that have maturities of less than 2 years, and we have both the ability and intent to hold the investments until maturity. We recorded no other-than-temporary impairments recorded during 2019, 2018 or 2017. The gross realized gains and losses on sales of marketable securities were not significant during the years ended December 31, 2019, 2018 and 2017.

Marketable securities as of December 31, 2019 and 2018 consisted of the following (in thousands):

	December 31, 2019
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities
U.S. government securities	$	105,453	$	249	$	—	$	105,702
Corporate bonds, asset backed and other securities	73,276		226		—		73,502
Total available-for-sale securities	$	178,729	$	475	$	—	$	179,204
Reported in:
Cash and cash equivalents							$	—
Short-term investments							179,204
Total marketable securities							$	179,204

	December 31, 2018
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities
Commercial paper	$	14,548	$	—	$	—		$	14,548
U.S. government securities	291,157		—		(1,581		)	289,576
Corporate bonds, asset backed and other securities	167,579		5		(984		)	166,600
Total available-for-sale securities	$	473,284	$	5	$	(2,565	)	$	470,724
Reported in:
Cash and cash equivalents								$	—
Short-term investments								470,724
Total marketable securities								$	470,724

As of December 31, 2019 and 2018, $163.1 million and $390.9 million, respectively, of our short-term investments had contractual maturities within one year. The remaining portions of our short-term investments had contractual maturities within one to two years.