STOCK-BASED COMPENSATION - Restricted Stock Unit and Performance-based Restricted Stock Unit - Tabular Disclosure (Details)	3 Months Ended
Aug. 26, 2018 $ / shares shares
Stock-settled restricted stock units
Shares
Outstanding at beginning of the period (in shares) \| shares	581,875
Granted (in shares) \| shares	184,461
Vested (in shares) \| shares	(103,343)
Forfeited/expired/cancelled (in shares) \| shares	(3,800)
Outstanding at end of the period (in shares) \| shares	659,193
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of the period (in dollars per share) \| $ / shares	$ 36.84
Granted (in dollars per share) \| $ / shares	69.77
Vested (in dollars per share) \| $ / shares	26.83
Forfeited/expired/cancelled (in dollars per share) \| $ / shares	53.17
Outstanding at end of the period (in dollars per share) \| $ / shares	$ 47.53
Cash-settled RSUs
Shares
Outstanding at beginning of the period (in shares) \| shares	285,652
Vested (in shares) \| shares	(148,774)
Outstanding at end of the period (in shares) \| shares	136,878
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of the period (in dollars per share) \| $ / shares	$ 28.54
Vested (in dollars per share) \| $ / shares	28.51
Outstanding at end of the period (in dollars per share) \| $ / shares	$ 28.58
Performance shares
Shares
Outstanding at beginning of the period (in shares) \| shares	160,270
Granted (in shares) \| shares	85,851
Performance condition adjustment \| shares	97,803
Vested (in shares) \| shares	(41,833)
Outstanding at end of the period (in shares) \| shares	302,091
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of the period (in dollars per share) \| $ / shares	$ 39.82
Granted (in dollars per share) \| $ / shares	69.77
Performance condition adjustment (in dollars per share) \| $ / shares	40.35
Vested (in dollars per share) \| $ / shares	26.84
Outstanding at end of the period (in dollars per share) \| $ / shares	$ 50.30

The number of performance condition adjustments shares made during the period.

No definition available.

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The weighted average fair value at grant date for nonvested performance condition adjustments during the period.

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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)
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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.

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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).

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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

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.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Name Accounting Standards Codification
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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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