Investments

3 Months Ended

Mar. 31, 2021

Investments

Investments

19. Investments

The gross unrealized gains and losses, and the amortized cost, allowance for credit losses, and fair value of those investments classified as available-for-sale at March 31, 2021 are summarized as follows (in thousands):

		Amortized	Gross		Gross		Fair		Allowance for
		Cost	Unrealized Gains		Unrealized Losses		Value		Credit Losses
Corporate bonds	$	99,239	$	—	$	(68)	$	99,171	$	—
Commercial paper		305,929		160		—		306,089		—
Totals	$	405,168	$	160	$	(68)	$	405,260	$	—

A summary of the amortized cost and fair value of investments classified as available-for-sale, by contractual maturity, is as follows (in thousands):

	March 31, 2021
		Amortized	Fair
Maturity:		Cost	Value
Within one year	$	375,804	$	375,927
After one through five years		29,364		29,333
Totals	$	405,168	$	405,260