Cash and Cash Equivalents, and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents, and Investments

The following table shows our cash and cash equivalents, and investments’ adjusted cost, unrealized gain, unrealized loss and fair value as of December 31, 2019 and 2018 (in thousands):



	December 31, 2019
	Cost		Unrealized Gain		Unrealized Loss			Fair Value
Cash and cash equivalents:
Cash	$	241,355	$	—	$	—		$	241,355
Money market funds	146,165		—		—			146,165
Total cash and cash equivalents	$	387,520	$	—	$	—		$	387,520
Short-term investments:
Commercial paper	$	7,489	$	—	$	—		$	7,489
Corporate securities	318,946		425		(78		)	319,293
U.S. treasury securities	44,251		39		(4		)	44,286
Agency bond	10,000		6		—			10,006
Total short-term investments	$	380,686	$	470	$	(82	)	$	381,074
Long-term investments
Corporate securities	$	295,103	$	533	$	(158	)	$	295,478
Agency bond	14,999		6		—			15,005
Total long-term investments	$	310,102	$	539	$	(158	)	$	310,483



	December 31, 2018
	Cost		Unrealized Gain		Unrealized Loss			Fair Value
Cash and cash equivalents:
Cash	$	351,345	$	—	$	—		$	351,345
Money market funds	5,052		—		—			5,052
Commercial paper	18,267		—		—			18,267
Total cash and cash equivalents	$	374,664	$	—	$	—		$	374,664
Short-term investments:
Commercial paper	$	40,500	$	—	$	(12	)	$	40,488
Corporate securities	38,616		—		(87		)	38,529
U.S. treasury securities	14,333		—		(5		)	14,328
Total short-term investments	$	93,449	$	—	$	(104	)	$	93,345
Long-term investments
Corporate securities	$	14,429	$	9	$	(14	)	$	14,424
U.S. treasury securities	1,630		—		(2		)	1,628
Total long-term investments	$	16,059	$	9	$	(16	)	$	16,052

Schedule of Available-for-sale Securities Reconciliation

The adjusted cost and fair value of investments as of December 31, 2019 by contractual maturity were as follows (in thousands):



	December 31, 2019
	Cost		Fair Value
Due in 1 year or less	$	380,686	$	381,074
Due in 1-2 years	310,102		310,483
Investments not due at a single maturity date	146,165		146,165
Total	$	836,953	$	837,722