XML 29 R22.htm IDEA: XBRL DOCUMENT v3.24.3
Marketable Securities (Tables)
 9 Months Ended
Oct. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Available-For-Sale Securities The amortized cost, gross unrealized gains (losses) and fair value of available-for-sale securities by major security type and class of security as of October 31, 2024, January 31, 2024 and October 31, 2023 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of October 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

178,736

 

 

$

151

 

 

$

(187

)

 

$

178,700

 

Federal government agencies

 

 

72,598

 

 

 

71

 

 

 

(20

)

 

 

72,649

 

Municipal and pre-refunded municipal bonds

 

 

64,129

 

 

 

70

 

 

 

(33

)

 

 

64,166

 

US Treasury securities

 

 

1,491

 

 

 

—

 

 

 

(3

)

 

 

1,488

 

Certificates of deposit

 

 

20,499

 

 

 

—

 

 

 

—

 

 

 

20,499

 

Commercial paper

 

 

2,943

 

 

 

—

 

 

 

—

 

 

 

2,943

 

 

 

340,396

 

 

 

292

 

 

 

(243

)

 

 

340,445

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

110,302

 

 

 

266

 

 

 

(398

)

 

 

110,170

 

Federal government agencies

 

 

35,098

 

 

 

16

 

 

 

(285

)

 

 

34,829

 

Municipal and pre-refunded municipal bonds

 

 

16,778

 

 

 

30

 

 

 

(12

)

 

 

16,796

 

US Treasury securities

 

 

59,507

 

 

 

197

 

 

 

(51

)

 

 

59,653

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

Mutual funds, held in rabbi trust

 

 

15,756

 

 

 

2,035

 

 

 

(2

)

 

 

17,789

 

 

 

238,441

 

 

 

2,544

 

 

 

(748

)

 

 

240,237

 

 

$

578,837

 

 

$

2,836

 

 

$

(991

)

 

$

580,682

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of January 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

123,418

 

 

$

27

 

 

$

(883

)

 

$

122,562

 

Federal government agencies

 

 

68,730

 

 

 

35

 

 

 

(94

)

 

 

68,671

 

Municipal and pre-refunded municipal bonds

 

 

47,915

 

 

 

9

 

 

 

(414

)

 

 

47,510

 

US Treasury securities

 

 

27,231

 

 

 

—

 

 

 

(36

)

 

 

27,195

 

Certificates of deposit

 

 

10,249

 

 

 

—

 

 

 

—

 

 

 

10,249

 

Commercial paper

 

 

10,557

 

 

 

—

 

 

 

—

 

 

 

10,557

 

 

 

288,100

 

 

 

71

 

 

 

(1,427

)

 

 

286,744

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

147,924

 

 

 

441

 

 

 

(388

)

 

 

147,977

 

Federal government agencies

 

 

65,698

 

 

 

138

 

 

 

(94

)

 

 

65,742

 

Municipal and pre-refunded municipal bonds

 

 

39,243

 

 

 

160

 

 

 

(35

)

 

 

39,368

 

US Treasury securities

 

 

34,604

 

 

 

169

 

 

 

(26

)

 

 

34,747

 

Certificates of deposit

 

 

11,250

 

 

 

—

 

 

 

—

 

 

 

11,250

 

Mutual funds, held in rabbi trust

 

 

13,817

 

 

 

1,344

 

 

 

(93

)

 

 

15,068

 

 

 

312,536

 

 

 

2,252

 

 

 

(636

)

 

 

314,152

 

 

$

600,636

 

 

$

2,323

 

 

$

(2,063

)

 

$

600,896

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of October 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

102,766

 

 

$

—

 

 

$

(1,336

)

 

$

101,430

 

Federal government agencies

 

 

66,216

 

 

 

—

 

 

 

(233

)

 

 

65,983

 

Municipal and pre-refunded municipal bonds

 

 

48,115

 

 

 

—

 

 

 

(727

)

 

 

47,388

 

US Treasury securities

 

 

13,157

 

 

 

—

 

 

 

(7

)

 

 

13,150

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

Commercial paper

 

 

20,976

 

 

 

—

 

 

 

—

 

 

 

20,976

 

 

 

251,479

 

 

 

—

 

 

 

(2,303

)

 

 

249,176

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

53,555

 

 

 

4

 

 

 

(1,155

)

 

 

52,404

 

Federal government agencies

 

 

49,203

 

 

 

—

 

 

 

(388

)

 

 

48,815

 

Municipal and pre-refunded municipal bonds

 

 

10,224

 

 

 

3

 

 

 

(136

)

 

 

10,091

 

US Treasury securities

 

 

7,398

 

 

 

1

 

 

 

(71

)

 

 

7,328

 

Certificates of deposit

 

 

1,250

 

 

 

—

 

 

 

—

 

 

 

1,250

 

Mutual funds, held in rabbi trust

 

 

13,252

 

 

 

147

 

 

 

(348

)

 

 

13,051

 

 

 

134,882

 

 

 

155

 

 

 

(2,098

)

 

 

132,939

 

 

$

386,361

 

 

$

155

 

 

$

(4,401

)

 

$

382,115