Fair Value Measurements (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Life Insurance, Corporate or Bank Owned, Amount	$ 42,700	$ 39,200
Deferred Compensation Liability, Current and Noncurrent	42,600	39,100
Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Carrying Value of Senior Notes, net	993,590	992,834
Fair Value, Inputs, Level 1 \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt Instrument, Fair Value Disclosure	1,030,000	988,000
Fair Value, Inputs, Level 2 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value	5,919	0
Fair Value, Inputs, Level 2 \| Other Current Assets [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net investment hedges - foreign currency forward contracts	254	0
Cash flow hedge - cross-currency swap	137	0
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	5,214	3,830
Fair Value, Inputs, Level 2 \| Other Noncurrent Assets [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Net investment hedges - foreign currency forward contracts	5,628	0
Fair Value, Inputs, Level 2 \| Other Current Liabilities [Member] \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash flow hedge - cross-currency swap	143	0
Net investment hedges - foreign currency forward contracts	$ 3,237	$ 6,641

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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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.

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Fair value of all derivative assets designated as hedges of net investment in foreign operations.

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Fair value of all derivative liabilities designated as hedges of net investment in foreign operations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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