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Other Assets (Tables)
12 Months Ended
Jan. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Assets
Other assets consisted of the following (in thousands):
 
January 31,
 
2019
 
2018
Non-marketable equity and other investments
$
50,546

 
$
29,205

Prepayments for computing infrastructure platforms
16,976

 
13,588

Technology patents, net
19,416

 
11,217

Acquired land leasehold interest, net
9,465

 
9,570

Deposits
4,383

 
4,492

Net deferred tax assets
4,544

 
1,884

Other
42,030

 
39,762

Total
$
147,360

 
$
109,718

Summary of Future Estimated Amortization Expense Related to Acquired Leasehold Interest and Patents
As of January 31, 2019, our future estimated amortization expense related to acquisition-related intangible assets is as follows (in thousands):
Fiscal Period:
 
2020
$
68,856

2021
48,142

2022
43,733

2023
41,009

2024
29,833

Thereafter
81,667

Total
$
313,240

As of January 31, 2019, the future estimated amortization expense is as follows (in thousands):
Fiscal Period:
 
2020
$
3,360

2021
3,031

2022
2,617

2023
2,351

2024
2,049

Thereafter
16,392

Total
$
29,800