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Long-Term Debt - Credit Agreement Additional Information (Detail) | Nov. 03, 2016 USD ($) | Jan. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Dec. 19, 2012 USD ($)
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Less deferred financing costs |  | $ 6,000,000 | $ 6,400,000 |
Long-term debt |  | 1,031,800,000 | 959,200,000 |
Current portion of long-term debt |  | 15,000,000 | 15,000,000 |
Long-term debt, excluding current maturities |  | $ 1,010,800,000 | 937,800,000 |
2017 Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt issued | $ 300,000,000.0 |  |  |
Optional additional borrowing capacity | $ 550,000,000 |  |  |
Leverage ratio, adjusted EBITDA | 4.00 |  |  |
Leverage ratio, adjusted EBITDA during collateral release period | 3.75 |  |  |
Interest coverage ratio, adjusted EBITDA | 3.00 |  |  |
Weighted average interest rate |  | 2.69% |  |
Actual interest rate |  | 2.74% |  |
Revolving Credit Facility | 2017 Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 800,000,000 |  |  |
Reduction in outstanding letter of credit |  | $ 14,400,000 |  |
Less deferred financing costs |  | 5,300,000 |  |
Long-term debt |  | 383,200,000 | $ 323,800,000 |
Current portion of long-term debt |  | 15,000,000 |  |
Long-term debt, excluding current maturities |  | 368,200,000 |  |
Line of Credit | Prior Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 1,000,000,000
Current borrowing available |  | $ 687,400,000 |  |

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