Percentage of target amount of performance awards employees can receive based on performance results.

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The additional number of common shares reserved for future issuance. The share is in regards to the number option and stock appreciation it can be settled for (two shares).

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Aggregate additional number of common shares reserved for future issuance. Share amount is in regards to the number of option and stock appreciation right it may be settled for (two shares).

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The number of shares considered in regards to each option and stock appreciation right granted under the incentive compensation plan.

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The number of shares considered in regards to each option and stock appreciation right may be settled under the incentive compensation plan.

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The maximum potential payout for the performance cash awards.

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The maximum number of Common Stock shares authorized for award.

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Total compensation expense authorized for non-employee directors per period.

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

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Unrecognized cost of unvested options awarded to employees as compensation.

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Amount of investments classified as other.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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The number of shares or units of entity securities issued in the transaction in which equity securities were issued to pay for goods or nonemployee services.

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Percentage of vesting of share-based compensation awards.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of non-vested options outstanding.

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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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EMPLOYEE BENEFIT PLANS Incentive and Stock Options Narrative (Details) - USD ($)		12 Months Ended
	May 23, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		898,169	739,493
Common Stock, Capital Shares Reserved for Future Issuance		6,980,081
Other accrued liabilities		$ 65,978,000	$ 46,679,000
Other liabilities and deferred credits		36,952,000	28,899,000
General and administrative		184,987,000	195,367,000	$ 224,645,000
Share-based Compensation		$ 10,436,000	12,352,000	21,181,000
Granted		622,652
Cash Bonus		$ 10,100,000	5,000,000	0
Contributions to deferred compensation plan		100,000	600,000	1,300,000
Rabbi Trust investments		2,300,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 2,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares		1,760,953
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		1 year 10 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 4,700,000	7,800,000	7,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		0	0	0
Proceeds from Stock Options Exercised		0	0	0
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options		$ 0	0	0
Employee Stock Option [Member] \| Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		33.00%
Employee Stock Option [Member] \| Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		33.00%
Employee Stock Option [Member] \| Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		33.00%
Restricted Stock And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options		$ 6,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		898,169
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		3 years
Share-based Compensation		$ 6,700,000	8,000,000	12,900,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		1 year 7 months
Restricted Stock And Restricted Stock Units [Member] \| Consultant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		6 months
Other accrued liabilities		$ 100,000
Other liabilities and deferred credits		1,000,000
General and administrative		$ 1,100,000
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued		22,034
Performance Cash [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		3 years
Performance Cash Max Payout		$ 15,700,000	7,900,000	7,400,000
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 1,500,000	$ 7,000,000	$ 1,400,000
Performance Cash [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash Based Performance Compensation Arrangement By Cash Based Payment Award Percentage Of Target Amount		0.00%
Performance Cash [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash Based Performance Compensation Arrangement By Cash Based Payment Award Percentage Of Target Amount		200.00%
Phantom Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		3 years
Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance		10,646,729
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		2,508,134
Plan 2007 [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Plan 2004 [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Director one \| Plan 2003 [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance		250,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		5,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period		6 months
2007 Plan Amendment [Member] \| Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock Additional Capital Shares Reserved for Future Issuance	5,250,000
Common Stock Additional Full Value Capital Shares Reserved for Future Issuance	2,625,000
Common Stock Capital Shares Reserved For Future Issuance Settled	6,400,000
Common Stock Full Value Capital Shares Reserved For Future Issuance	3,200,000
Number Of Shares Considered Stock Option And Stock Appreciation Right Granted	1
Number Of Shares Considered Stock Option And Stock Appreciation Right Settled	2
Share-based Compensation Common Stock Award Maximum	1,000,000	500,000
Total Compensation Authorized For Non Employee Directors	$ 1,125,000