XML 29 R22.htm IDEA: XBRL DOCUMENT v3.25.1
Marketable Securities (Tables)
 3 Months Ended
Apr. 30, 2025
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 April 30, 2025, January 31, 2025 and April 30, 2024 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of April 30, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

181,973

 

 

$

102

 

 

$

(170

)

 

$

181,905

 

US Treasury securities

 

 

3,952

 

 

 

—

 

 

 

(3

)

 

 

3,949

 

Federal government agencies

 

 

38,187

 

 

 

29

 

 

 

(4

)

 

 

38,212

 

Municipal and pre-refunded municipal bonds

 

 

43,152

 

 

 

36

 

 

 

(10

)

 

 

43,178

 

Certificates of deposit

 

 

10,499

 

 

 

—

 

 

 

—

 

 

 

10,499

 

Commercial paper

 

 

7,842

 

 

 

—

 

 

 

—

 

 

 

7,842

 

 

 

285,605

 

 

 

167

 

 

 

(187

)

 

 

285,585

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

203,858

 

 

 

915

 

 

 

(108

)

 

 

204,665

 

US Treasury securities

 

 

87,179

 

 

 

989

 

 

 

—

 

 

 

88,168

 

Federal government agencies

 

 

46,308

 

 

 

44

 

 

 

(90

)

 

 

46,262

 

Municipal and pre-refunded municipal bonds

 

 

6,775

 

 

 

37

 

 

 

(2

)

 

 

6,810

 

Mutual funds, held in rabbi trust

 

 

19,764

 

 

 

75

 

 

 

(807

)

 

 

19,032

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

 

 

364,884

 

 

 

2,060

 

 

 

(1,007

)

 

 

365,937

 

 

$

650,489

 

 

$

2,227

 

 

$

(1,194

)

 

$

651,522

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of January 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

186,732

 

 

$

103

 

 

$

(114

)

 

$

186,721

 

US Treasury securities

 

 

5,415

 

 

 

—

 

 

 

(5

)

 

 

5,410

 

Federal government agencies

 

 

53,663

 

 

 

55

 

 

 

(7

)

 

 

53,711

 

Municipal and pre-refunded municipal bonds

 

 

53,772

 

 

 

70

 

 

 

(8

)

 

 

53,834

 

Certificates of deposit

 

 

10,499

 

 

 

—

 

 

 

—

 

 

 

10,499

 

Commercial paper

 

 

9,774

 

 

 

—

 

 

 

—

 

 

 

9,774

 

 

 

319,855

 

 

 

228

 

 

 

(134

)

 

 

319,949

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

233,418

 

 

 

298

 

 

 

(500

)

 

$

233,216

 

US Treasury securities

 

 

92,852

 

 

 

226

 

 

 

(90

)

 

 

92,988

 

Federal government agencies

 

 

50,579

 

 

 

16

 

 

 

(292

)

 

 

50,303

 

Municipal and pre-refunded municipal bonds

 

 

14,770

 

 

 

35

 

 

 

(8

)

 

 

14,797

 

Mutual funds, held in rabbi trust

 

 

15,673

 

 

 

2,246

 

 

 

(15

)

 

 

17,904

 

Certificates of deposit

 

 

1,000

 

 

 

—

 

 

 

—

 

 

 

1,000

 

 

 

408,292

 

 

 

2,821

 

 

 

(905

)

 

 

410,208

 

 

$

728,147

 

 

$

3,049

 

 

$

(1,039

)

 

$

730,157

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of April 30, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

145,891

 

 

$

3

 

 

$

(1,000

)

 

$

144,894

 

US Treasury securities

 

 

28,925

 

 

 

—

 

 

 

(127

)

 

 

28,798

 

Federal government agencies

 

 

76,515

 

 

 

—

 

 

 

(204

)

 

 

76,311

 

Municipal and pre-refunded municipal bonds

 

 

49,515

 

 

 

4

 

 

 

(204

)

 

 

49,315

 

Certificates of deposit

 

 

10,249

 

 

 

—

 

 

 

—

 

 

 

10,249

 

Commercial paper

 

 

2,991

 

 

 

—

 

 

 

—

 

 

 

2,991

 

 

 

314,086

 

 

 

7

 

 

 

(1,535

)

 

 

312,558

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

119,907

 

 

 

19

 

 

 

(1,116

)

 

 

118,810

 

US Treasury securities

 

 

49,943

 

 

 

—

 

 

 

(677

)

 

 

49,266

 

Federal government agencies

 

 

53,486

 

 

 

—

 

 

 

(502

)

 

 

52,984

 

Municipal and pre-refunded municipal bonds

 

 

38,785

 

 

 

9

 

 

 

(286

)

 

 

38,508

 

Mutual funds, held in rabbi trust

 

 

15,950

 

 

 

443

 

 

 

(33

)

 

 

16,360

 

Certificates of deposit

 

 

11,250

 

 

 

—

 

 

 

—

 

 

 

11,250

 

 

 

289,321

 

 

 

471

 

 

 

(2,614

)

 

 

287,178

 

 

$

603,407

 

 

$

478

 

 

$

(4,149

)

 

$

599,736