Shareholders' Equity (Details 3) $ / shares in Units, $ in Millions	12 Months Ended
Feb. 02, 2019 USD ($) $ / shares shares
Shareholders Equity
Number of Shares	257,890
Performance shares
Shareholders Equity
Number of Shares	45,000
Average Market Price on Date of Grant (in dollars per share) \| $ / shares	$ 79
Performance shares \| Fiscal 2016
Shareholders Equity
Number of Shares	117,837
Average Market Price on Date of Grant (in dollars per share) \| $ / shares	$ 57
Restricted share units
Shareholders Equity
Number of Shares	22,100
Average Market Price on Date of Grant (in dollars per share) \| $ / shares	$ 71
Unrecognized compensation expense related to unvested share-based restricted stock awards and the unvested restricted share units (in dollars) \| $	$ 8.5
Restricted share units \| Fiscal 2016
Shareholders Equity
Number of Shares	74,317
Average Market Price on Date of Grant (in dollars per share) \| $ / shares	$ 73
Restricted share units \| Fiscal 2017
Shareholders Equity
Number of Shares	43,636
Average Market Price on Date of Grant (in dollars per share) \| $ / shares	$ 75

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=109197908&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&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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