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Marketable Securities (Tables)
 12 Months Ended
Jan. 31, 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 values of available-for-sale securities by major security type and class of security as of January 31, 2025 and 2024 are as follows:

 

 

Amortized
Cost

 

 

Unrealized
Gains

 

 

Unrealized
(Losses)

 

 

Fair
Value

 

As of January 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

186,732

 

 

$

103

 

 

$

(114

)

 

$

186,721

 

Federal government agencies

 

 

53,663

 

 

 

55

 

 

 

(7

)

 

 

53,711

 

US Treasury securities

 

 

5,415

 

 

 

—

 

 

 

(5

)

 

 

5,410

 

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

 

Federal government agencies

 

 

50,579

 

 

 

16

 

 

 

(292

)

 

 

50,303

 

US Treasury securities

 

 

92,852

 

 

 

226

 

 

 

(90

)

 

 

92,988

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

Mutual funds, held in rabbi trust

 

 

13,817

 

 

 

1,344

 

 

 

(93

)

 

 

15,068

 

Certificates of deposit

 

 

11,250

 

 

 

—

 

 

 

—

 

 

 

11,250

 

 

 

312,536

 

 

 

2,252

 

 

 

(636

)

 

 

314,152

 

 

$

600,636

 

 

$

2,323

 

 

$

(2,063

)

 

$

600,896

 
Gross Unrealized Losses and Fair Value of Marketable Securities

The following tables show the gross unrealized losses and fair value of the Company’s marketable securities with unrealized losses that are not deemed to have credit losses, aggregated by the length of time that individual securities have been in a continuous unrealized loss position, at January 31, 2025 and 2024, respectively.

 

 

January 31, 2025

 

 

Less Than 12 Months

 

 

12 Months or Greater

 

 

Total

 

Description of Securities

 

Fair Value

 

 

Unrealized
Losses

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Fair Value

 

 

Unrealized
Losses

 

Corporate bonds

 

$

206,917

 

 

$

(587

)

 

$

8,093

 

 

$

(27

)

 

$

215,010

 

 

$

(614

)

Federal government agencies

 

 

49,234

 

 

 

(298

)

 

 

5,738

 

 

 

(1

)

 

 

54,972

 

 

 

(299

)

US Treasury securities

 

 

37,007

 

 

 

(94

)

 

 

1,495

 

 

 

(1

)

 

 

38,502

 

 

 

(95

)

Municipal and pre-refunded municipal bonds

 

 

6,917

 

 

 

(13

)

 

 

1,502

 

 

 

(3

)

 

 

8,419

 

 

 

(16

)

Mutual funds, held in rabbi trust

 

 

1,316

 

 

 

(15

)

 

 

—

 

 

 

—

 

 

 

1,316

 

 

 

(15

)

Total

 

$

301,391

 

 

$

(1,007

)

 

$

16,828

 

 

$

(32

)

 

$

318,219

 

 

$

(1,039

)

 

 

January 31, 2024

 

 

Less Than 12 Months

 

 

12 Months or Greater

 

 

Total

 

Description of Securities

 

Fair Value

 

 

Unrealized
Losses

 

 

Fair Value

 

 

Unrealized
Losses

 

 

Fair Value

 

 

Unrealized
Losses

 

Corporate bonds

 

$

104,563

 

 

$

(168

)

 

$

53,680

 

 

$

(1,103

)

 

$

158,243

 

 

$

(1,271

)

Federal government agencies

 

 

74,516

 

 

 

(188

)

 

 

—

 

 

 

—

 

 

 

74,516

 

 

 

(188

)

US Treasury securities

 

 

35,135

 

 

 

(62

)

 

 

—

 

 

 

—

 

 

 

35,135

 

 

 

(62

)

Municipal and pre-refunded municipal bonds

 

 

24,070

 

 

 

(48

)

 

 

21,613

 

 

 

(401

)

 

 

45,683

 

 

 

(449

)

Mutual funds, held in rabbi trust

 

 

1,059

 

 

 

(93

)

 

 

—

 

 

 

—

 

 

 

1,059

 

 

 

(93

)

Total

 

$

239,343

 

 

$

(559

)

 

$

75,293

 

 

$

(1,504

)

 

$

314,636

 

 

$

(2,063

)