Derivative Financial Instruments Designated as Cash Flow Hedges (Details) - USD ($)
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3 Months Ended |
6 Months Ended |
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2017 |
Apr. 30, 2016 |
| Senior Notes 2027 [Member] |
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| Derivative Cash Flow Hedge [Line Items] |
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| Notional value of derivative liability |
$ 125,000,000
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|
$ 125,000,000
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| Amount of hedged item |
125,000,000
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|
125,000,000
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| Gain (loss) expected to be reclassified as interest expense on derivative financial instruments designated as cash flow hedges, over the next twelve months |
(100,000)
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| Loss reclassified to interest expense on derivative financial instruments designated as cash flow hedges |
3,000
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|
|
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| Loss on hedge from treasury lock transaction |
700,000
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|
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| Income tax benefit on losess from treasury lock transaction |
300,000
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| Senior Notes 2023 [Member] |
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| Derivative Cash Flow Hedge [Line Items] |
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| Gain reclassified to interest expense on derivative financial instruments designated as cash flow hedges |
50,000
|
$ 50,000
|
100,000
|
$ 100,000
|
| Gain (loss) expected to be reclassified as interest expense on derivative financial instruments designated as cash flow hedges, over the next twelve months |
|
|
200,000
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| Unamortized gain (loss) on interest rate lock |
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|
1,200,000
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| Senior Notes 2017 [Member] |
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| Derivative Cash Flow Hedge [Line Items] |
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|
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| Unamortized gain (loss) on interest rate lock |
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|
(100,000)
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| Loss reclassified to interest expense on derivative financial instruments designated as cash flow hedges |
$ 56,000
|
$ 56,000
|
$ 100,000
|
$ 100,000
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