Commitments and Contingencies (Details) - Charitable Gift [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Apr. 30, 2018	Oct. 31, 2019
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Amount		$ 5,000
Loss Contingency Accrual		3,292
Cumulative Loss Contingency Accrual, Payments		1,430
Selling, General and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Loss Contingency, Loss in Period	$ 4,503
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Accrual, Current		710
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Accrual, Noncurrent		$ 2,582

The minimum amount the entity agreed to spend under the long-term purchase commitment.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

+ Details

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- Definition

Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

+ References

+ Details

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- Definition

Amount of loss contingency liability expected to be resolved after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

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- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

+ Details

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- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

+ References

+ Details

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