v3.20.4
Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments, Measured at Fair Value on a Recurring and Non-recurring Basis
As at December 31, 2020, the carrying amount and fair value of the Company’s financial instruments were as follows:
Level 1
$		Level 2
$		Level 3
$
Carrying AmountFair ValueCarrying AmountFair ValueCarrying AmountFair Value
Assets:
Cash equivalents:
U.S. federal bonds174,397174,399————
Corporate bonds and commercial paper134,056134,396————
Repurchase agreements——290,000290,001——
Marketable securities:
U.S. term deposits885,000887,102————
U.S. federal bonds1,224,0521,226,657————
Canadian federal bonds24,98824,987————
Corporate bonds and commercial paper——1,550,3301,552,907——
Derivative assets:
Foreign exchange forward contracts——16,34016,340——
As at December 31, 2019, the carrying amount and fair value of the Company’s financial instruments were as follows: 
Level 1   
$  		Level 2
$		Level 3
$
Carrying AmountFair ValueCarrying AmountFair ValueCarrying AmountFair Value
Assets:
Cash equivalents:
Repurchase agreements——200,000200,009——
Marketable securities:
U.S. term deposits300,000301,354————
U.S. federal bonds222,713223,403————
Canadian federal bonds69,92269,919————
Corporate bonds and commercial paper——1,212,6431,216,822——
Derivative assets:
Foreign exchange forward contracts——5,8305,830——