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Credit Facility - Interest Rate Swaps (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2018 | Apr. 30, 2017 | Nov. 01, 2018 | Oct. 31, 2017
Line of Credit Facility [Line Items] |  |  |  |
Proceeds from termination of interest rate swaps | $ 25,900,000 | $ 0 |  |
Net gains from cash flow hedges recorded in accumulated other comprehensive loss, net of tax | 18,600,000 |  |  | $ 1,700,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, gross | 3,800,000 |  |  |
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net | 1,500,000 |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Tax related to amounts in accumulated other comprehensive loss | $ 7,400,000 |  |  | $ 1,200,000
Subsequent Event | Interest Rate Swap, Maturity 4/30/2021 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Notional amount |  |  | $ 90,000,000 |
Derivative, fixed interest rate (percent) |  |  | 2.8275% |
Subsequent Event | Interest Rate Swap, Maturity 10/31/2021 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Notional amount |  |  | $ 90,000,000 |
Derivative, fixed interest rate (percent) |  |  | 2.84% |
Subsequent Event | Interest Rate Swap, Maturity 4/30/2022 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Notional amount |  |  | $ 130,000,000 |
Derivative, fixed interest rate (percent) |  |  | 2.86% |
Subsequent Event | Interest Rate Swap, Maturity 9/1/2022 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Notional amount |  |  | $ 130,000,000 |
Derivative, fixed interest rate (percent) |  |  | 2.84% |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 + Details
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