XML 66 R55.htm IDEA: XBRL DOCUMENT v3.19.1
Other Assets (Summary of Future Estimated Amortization Expense Related to Acquired Land Leasehold Interest and Technology Patents) (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Jan. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Total $ 293,897 $ 313,240
Technology patents and other intangible assets, net    
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2020 2,438  
2021 2,926  
2022 2,512  
2023 2,246  
2024 1,943  
Thereafter 7,454  
Total $ 19,519 $ 20,335