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Fair Value Measurements (Tables)
12 Months Ended
Jan. 03, 2020
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Assets Measured on a Recurring Basis
The classifications within the fair value hierarchy of our financial assets that were measured and recorded at fair value on a recurring basis were as follows (in thousands):
 
December 31, 2019
 
Level 1
 
Level 2
 
Total
Commercial paper
$

 
$
389,573

 
$
389,573

Corporate bonds

 
756,226

 
756,226

U.S. Treasury and government sponsored enterprises

 
166,665

 
166,665

Total investment securities available-for-sale

 
1,312,464

 
1,312,464

Money market funds
2,467

 

 
2,467

Certificates of deposit

 
32,733

 
32,733

Total financial assets carried at fair value
$
2,467

 
$
1,345,197

 
$
1,347,664

 
December 31, 2018
 
Level 1
 
Level 2
 
Total
Commercial paper
$

 
$
381,133

 
$
381,133

Corporate bonds

 
344,064

 
344,064

U.S. Treasury and government sponsored enterprises

 
55,201

 
55,201

Total investment securities available-for-sale

 
780,398

 
780,398

Money market funds
47,744

 

 
47,744

Certificates of deposit

 
16,596

 
16,596

Total financial assets carried at fair value
$
47,744

 
$
796,994

 
$
844,738