Stock-Based Compensation (Details Textual) - USD ($)		12 Months Ended
Apr. 04, 2013	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term		6 years	5 years	5 years
Risk-free interest rate		1.42%	1.34%	1.64%
Expected volatility		47.81%	48.77%	51.13%
Dividend yield		1.01%	0.81%	0.68%
Weighted-average grant date fair value of options granted		$ 11.17	$ 12.31	$ 17.99
Compensation expense		$ 1,300,000	$ 1,100,000	$ 1,200,000
Compensation expense, net of tax		800,000	600,000	700,000
Unrecognized compensation cost related to unvested stock options		$ 2,100,000
Weighted-average period		1 year 9 months 18 days
Cash received for stock option exercises		$ 1,000,000	600,000	1,700,000
Realized tax expense		100,000
Fair value of stock options exercised		200,000	200,000	1,600,000
Fair value of the stock options vested		2,000,000	2,900,000	0
Intrinsic value of outstanding stock options		600,000	300,000	200,000
Intrinsic value of exercisable stock options		400,000	300,000	200,000
Stock Award Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense		3,200,000	2,700,000	2,400,000
Compensation expense, net of tax		$ 2,000,000	1,700,000	1,500,000
Weighted-average period		1 year 8 months 12 days
Unrecognized compensation cost		$ 5,100,000
Fair value of stock award units vested		$ 4,800,000	$ 2,500,000	$ 4,900,000
Units granted, Weighted Average Grant Date Fair Value		$ 27.76	$ 29.48	$ 41.32
Fair value of unvested stock award units		$ 10,300,000	$ 9,600,000	$ 8,100,000
Realized tax expense on vested stock awards		$ 200,000
Employee Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock shares	11,000,000
Minimum \| Stock Award Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock awards vesting period		3 years
Minimum \| Employee Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted to participants exercisable period	3 years
Maximum \| Stock Award Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock awards vesting period		5 years
Maximum \| Employee Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted to participants exercisable period	5 years

Employee service share based compensation windfall tax expense benefit realized from exercise of stock options.

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- Definition

Employee service share based compensation windfall tax expense benefit realized on vested stock awards.

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- Definition

Share based compensation arrangement by share based payment award options exercisable period.

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- Definition

Share based compensation arrangement by share based payment award options exercises in period fair value.

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- Definition

Sharebased compensation arrangement by sharebased payment award equity instruments other than options aggregate fair value.

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- Definition

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.

+ References

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
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The amount of expense, net of income tax, 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.

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- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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- Definition

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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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ 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

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: 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.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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