Cash and Available-for-Sale Securities - (Tables)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Cash and Cash Equivalents and Investments

Cash, cash equivalents and investments consisted of the following (in thousands): 

	March 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and Cash Equivalents		Investments
Cash	$	226,349	$	—	$	—	$	226,349	$	226,349	$	—
Time deposits	630,000		—		—		630,000		350,000		280,000
Money market funds	125,253		—		—		125,253		125,253		—
Totals	$	981,602	$	—	$	—	$	981,602	$	701,602	$	280,000

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and Cash Equivalents		Investments
Cash	$	333,172	$	—	$	—	$	333,172	$	333,172	$	—
Time deposits	460,000		—		—		460,000		20,000		440,000
Money market funds	284,172		—		—		284,172		284,172		—
Totals	$	1,077,344	$	—	$	—	$	1,077,344	$	637,344	$	440,000