Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 942
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-Section S99
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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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Amount, after accumulated amortization, of debt discount.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash inflow (outflow) from long-term debt wholly or partially secured by collateral. Excludes tax exempt secured debt.

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LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT - SUMMARY (Details) - USD ($)	Jun. 29, 2017	Jun. 18, 2014	Jul. 31, 2018	Jan. 31, 2018
2017 Credit Agreement
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity			$ 725,000,000
2017 Term Loan
Debt Instrument
Long-term Debt, Gross	$ 425,000,000		420,750,000	$ 422,875,000
Unamortized Debt Discount	500,000
2017 Revolving Credit Facility
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity			$ 300,000,000
2014 Term Loans
Debt Instrument
Proceeds from (Repayments of) Secured Debt	$ 406,900,000	$ 530,000,000