Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Stock Bonus Program, Number of Shares Authorized

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No definition available.

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STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - BONUS SHARE PROGRAM (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 08, 2016	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Mar. 31, 2015
Stock-Based Compensation Plans
Allocated share-based compensation expense		$ 64,549	$ 54,458	$ 34,991
Stock Bonus Program
Stock-Based Compensation Plans
Stock Bonus Program, number of shares authorized		125,000	125,000	150,000
Discount from market price (as a percent)		15.00%	15.00%	15.00%
Bonus Share Program
Stock-Based Compensation Plans
Allocated share-based compensation expense			$ 4,700
Granted (in shares)		74,000
Combined Stock Bonus Program and Bonus Share Program
Stock-Based Compensation Plans
Allocated share-based compensation expense		$ 6,359	$ 7,680	$ 4,572
2016 Plan \| Bonus Share Program
Stock-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					75,000
2016 Plan \| Combined Stock Bonus Program and Bonus Share Program
Stock-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					200,000
Subsequent Event \| 2017 Plan \| Stock Bonus Program
Stock-Based Compensation Plans
Stock Bonus Program, number of shares authorized	125,000
Discount from market price (as a percent)	15.00%
Subsequent Event \| 2017 Plan \| Bonus Share Program
Stock-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	81,250
Subsequent Event \| 2017 Plan \| Combined Stock Bonus Program and Bonus Share Program
Stock-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	206,250