Marketable Securities

3 Months Ended

Mar. 31, 2023

Investments Debt And Equity Securities [Abstract]

Marketable securities

As of March 31, 2023, the Company had $170,184 of trading securities and $447,612 of available-for-sale securities (December 31, 2022 – $276,642 and $386,885, respectively). Amortized cost, unrealized losses recognized in accumulated other comprehensive loss and fair value of available-for-sale securities consisted of the following:


	March 31, 2023							December 31, 2022
	Amortized Cost		Unrealized Gain/(Loss)			Fair Value		Amortized Cost		Unrealized Loss			Fair Value
Contractual maturity of 0 to 1 years:
Guaranteed investment certificates	$	15,161	$	—		$	15,161	$	14,953	$	—		$	14,953
U.S. treasuries		106,527		(721	)		105,806		78,880		(837	)		78,043
U.S. government securities		26,498		60			26,558		5,793		(20	)		5,773
Commercial paper		131,002		—			131,002		150,560		—			150,560
Corporate debt securities		8,866		(46	)		8,820		8,942		(68	)		8,874
Contractual maturity of 1 to 3 years:
U.S. treasuries		67,140		(327	)		66,813		60,354		(958	)		59,396
U.S. government securities		38,307		141			38,448		26,741		(35	)		26,706
Corporate debt securities		54,941		63			55,004		42,672		(92	)		42,580
Total	$	448,442	$	(830	)	$	447,612	$	388,895	$	(2,010	)	$	386,885

Allowance for credit losses or impairment on these marketable securities have not been recognized as these securities are high credit quality, investment grade securities that the Company does not intend to sell and will not be required to sell prior to their anticipated recovery, and the decline in fair value is primarily due to changes in interest rates.