XML 29 R22.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Marketable Securities (Tables)
 6 Months Ended
Jul. 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 July 31, 2024, January 31, 2024 and July 31, 2023 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of July 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

179,538

 

 

$

26

 

 

$

(567

)

 

$

178,997

 

Federal government agencies

 

 

73,850

 

 

 

7

 

 

 

(115

)

 

 

73,742

 

US Treasury securities

 

 

29,150

 

 

 

—

 

 

 

(59

)

 

 

29,091

 

Municipal and pre-refunded municipal bonds

 

 

47,174

 

 

 

17

 

 

 

(65

)

 

 

47,126

 

Certificates of deposit

 

 

20,499

 

 

 

—

 

 

 

—

 

 

 

20,499

 

Commercial paper

 

 

2,905

 

 

 

—

 

 

 

—

 

 

 

2,905

 

 

 

353,116

 

 

 

50

 

 

 

(806

)

 

 

352,360

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

79,873

 

 

 

147

 

 

 

(87

)

 

 

79,933

 

Federal government agencies

 

 

35,635

 

 

 

7

 

 

 

(105

)

 

 

35,537

 

US Treasury securities

 

 

49,951

 

 

 

200

 

 

 

(45

)

 

 

50,106

 

Municipal and pre-refunded municipal bonds

 

 

25,250

 

 

 

19

 

 

 

(69

)

 

 

25,200

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

Mutual funds, held in rabbi trust

 

 

16,011

 

 

 

1,682

 

 

 

—

 

 

 

17,693

 

 

 

207,720

 

 

 

2,055

 

 

 

(306

)

 

 

209,469

 

 

$

560,836

 

 

$

2,105

 

 

$

(1,112

)

 

$

561,829

 

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

 

US Treasury securities

 

 

27,231

 

 

 

—

 

 

 

(36

)

 

 

27,195

 

Municipal and pre-refunded municipal bonds

 

 

47,915

 

 

 

9

 

 

 

(414

)

 

 

47,510

 

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

 

US Treasury securities

 

 

34,604

 

 

 

169

 

 

 

(26

)

 

 

34,747

 

Municipal and pre-refunded municipal bonds

 

 

39,243

 

 

 

160

 

 

 

(35

)

 

 

39,368

 

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 July 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

96,902

 

 

$

1

 

 

$

(1,239

)

 

$

95,664

 

Federal government agencies

 

 

47,287

 

 

 

—

 

 

 

(163

)

 

 

47,124

 

US Treasury securities

 

 

18,661

 

 

 

—

 

 

 

(16

)

 

 

18,645

 

Municipal and pre-refunded municipal bonds

 

 

48,350

 

 

 

—

 

 

 

(670

)

 

 

47,680

 

Commercial paper

 

 

41,719

 

 

 

—

 

 

 

—

 

 

 

41,719

 

 

 

252,919

 

 

 

1

 

 

 

(2,088

)

 

 

250,832

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

47,835

 

 

 

—

 

 

 

(1,745

)

 

 

46,090

 

Federal government agencies

 

 

44,914

 

 

 

—

 

 

 

(464

)

 

 

44,450

 

US Treasury securities

 

 

2,969

 

 

 

—

 

 

 

(61

)

 

 

2,908

 

Municipal and pre-refunded municipal bonds

 

 

13,980

 

 

 

—

 

 

 

(469

)

 

 

13,511

 

Certificates of deposit

 

 

1,499

 

 

 

—

 

 

 

—

 

 

 

1,499

 

Mutual funds, held in rabbi trust

 

 

12,941

 

 

 

1,027

 

 

 

(70

)

 

 

13,898

 

 

 

124,138

 

 

 

1,027

 

 

 

(2,809

)

 

 

122,356

 

 

$

377,057

 

 

$

1,028

 

 

$

(4,897

)

 

$

373,188