Debt - Term Loan and Revolving Credit Facility (Details) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Oct. 31, 2020
USD ($)
|
Oct. 31, 2020
USD ($)
|
Jun. 13, 2018
USD ($)
lender
|
|
| Line of Credit Facility [Line Items] | |||
| Number of lenders | lender | 12 | ||
| Unused commitment fee percentage | 0.175% | ||
| Line of Credit | Revolving Credit Facility | |||
| Line of Credit Facility [Line Items] | |||
| Borrowing capacity | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 |
| Debt term | 5 years | ||
| Line of Credit | Revolving Credit Facility | LIBOR | |||
| Line of Credit Facility [Line Items] | |||
| Basis spread on variable rate (as a percent) | 1.50% | ||
| Term Loan | |||
| Line of Credit Facility [Line Items] | |||
| Borrowing capacity | $ 900,000,000.0 | ||
| Debt term | 3 years | ||
| Effective interest rate | 3.684% | 3.684% | |
| Repayments of debt | $ 100,000,000.0 | ||
| Debt issuance cost write off | $ 300,000 | ||
| Term Loan | LIBOR | |||
| Line of Credit Facility [Line Items] | |||
| Basis spread on variable rate (as a percent) | 1.375% |