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Auction Rate Securities | 9 Months Ended
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Jul. 31, 2018
Investments, Debt and Equity Securities [Abstract] |
Auction Rate Securities | AUCTION RATE SECURITIES
At October 31, 2017, we held investments in auction rate securities from two different issuers that had an aggregate original principal amount of $10.0 million and an amortized cost and fair value of $8.0 million. During the third quarter of 2018, we sold one of our auction rate securities with an original par value of $5.0 million and an amortized cost basis of $3.0 million for proceeds of $2.9 million. The resulting loss is included in “Selling, general and administrative expenses” on the accompanying unaudited consolidated statements of comprehensive income (loss). The total amount of other-than-temporary impairment credit loss previously recognized on this security investment and included in our retained earnings was $2.0 million. At July 31, 2018, the remaining auction rate security had an aggregate original principal amount, amortized cost, and fair value of $5.0 million. This auction rate security is a debt instrument with a stated maturity in 2050. The interest rate for this security is designed to be reset through Dutch auctions approximately every thirty days; however, auctions for this security have not occurred since August 2007. At July 31, 2018 and October 31, 2017, there were no unrealized gains or losses on our auction rate securities included in accumulated other comprehensive income (loss), net of taxes (“AOCI”). Significant Assumptions Used to Determine the Fair Values of Our Auction Rate Securities
Assumption |  | July 31, 2018 |  | October 31, 2017
Discount rates |  | L + 0.41% |  | L + 0.42% and L + 0.79%
Yields |  | L + 2.00% |  | 2.15%, L + 2.00%
Average expected lives |  | 4 years |  | 4 - 10 years
L – One Month LIBOR

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=4738149 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2289146 + Details
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