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Share-Based Compensation - Summary of the Activity for Performance-Based Restricted Stock Units (Details) - Performance-based RSUs - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 29, 2018 | Jan. 27, 2019 | Jan. 28, 2018 | Jan. 29, 2017
Units |  |  |  |  |  |  |  |
Beginning balance (in shares) |  | 363,000 | 363,000 |  |  |  |  |
Performance units granted (in shares) |  | 200,442 | 287,000 | [1] | 215,857 | [1] | 231,000 | [1]
Performance units vested (in shares) |  |  | (431,000) |  |  |  |  |
Performance units cancelled/forfeited (in shares) |  |  | (16,000) |  |  |  |  |
Ending balance (in shares) |  |  | 203,000 |  | 363,000 |  |  |
Weighted Average Grant Date Fair Value (per share) |  |  |  |  |  |  |  |
Beginning balance (in dollars per share) |  | $ 26.58 | $ 26.58 |  |  |  |  |
Weighted average fair value units granted (in dollars per share) | [1] |  | 32.93 |  | $ 39.55 |  | $ 17.51 |
Performance units vested (in dollars per share) |  |  | 25.83 |  |  |  |  |
Performance units cancelled/forfeited (in dollars per share) |  |  | 20.28 |  |  |  |  |
Ending balance (in dollars per share) |  |  | $ 37.51 |  | $ 26.58 |  |  |
Subject to share settlement |  |  |  |  |  |  |  |
Units |  |  |  |  |  |  |  |
Beginning balance (in shares) |  | 255,000 | 255,000 |  |  |  |  |
Performance units granted (in shares) |  |  | 244,000 |  |  |  |  |
Performance units vested (in shares) |  |  | (286,000) |  |  |  |  |
Performance units cancelled/forfeited (in shares) |  |  | (10,000) |  |  |  |  |
Change in liability (in shares) |  |  | 0 |  |  |  |  |
Ending balance (in shares) |  |  | 203,000 |  | 255,000 |  |  |
Subject to cash settlement |  |  |  |  |  |  |  |
Units |  |  |  |  |  |  |  |
Beginning balance (in shares) |  | 108,000 | 108,000 |  |  |  |  |
Performance units granted (in shares) |  |  | 43,000 |  |  |  |  |
Performance units vested (in shares) |  |  | (145,000) |  |  |  |  |
Performance units cancelled/forfeited (in shares) |  |  | (6,000) |  |  |  |  |
Ending balance (in shares) |  |  | 0 |  | 108,000 |  |  |
Recorded Liability |  |  |  |  |  |  |  |
Beginning balance |  | $ 6,468 | $ 6,468 |  |  |  |  |
Performance units vested |  |  | 0 |  |  |  |  |
Change in liability |  |  | 2,845 |  |  |  |  |
Ending balance |  |  | $ 9,313 |  | $ 6,468 |  |  |
[1] | Restricted stock units granted includes awards that will be cash settled of 146,827 units in fiscal year 2019, 0 units in fiscal year 2018, and 115,500 units in fiscal year 2017.

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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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://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 + Details
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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 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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 + Details
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