STOCKHOLDERS' EQUITY - RESTRICTED STOCK AND STOCK UNIT ACTIVITY (Details) - USD ($)	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Restricted Stock and Restricted Stock Units
Stockholder's equity
Unrecognized compensation costs (in dollars)	$ 3,491,000
Expected period to recognize unrecognized compensation costs	1 year 7 months 6 days
Number of Shares
Unvested restricted stock and units outstanding, beginning of year (in shares)	91,837	72,000	28,109
Granted (in shares)	121,939	65,950	70,515
Vested (in shares)	(28,894)	(33,834)	(22,561)
Forfeited (in shares)	(18,930)	(12,279)	(4,063)
Unvested restricted stock and units outstanding, end of year (in shares)	165,952	91,837	72,000
Weighted Average Grant Date Fair Value
Unvested restricted stock and units outstanding, beginning of year (in dollars per share)	$ 62.99	$ 61.30	$ 66.20
Granted (in dollars per share)	43.54	63.67	60.52
Vested (in dollars per share)	53.38	60.89	64.53
Forfeited (in dollars per share)	57.42	62.53	63.73
Unvested restricted stock and units outstanding, end of year (in dollars per share)	$ 51.01	$ 62.99	$ 61.30
Restricted Stock and Restricted Stock Units \| Minimum
Stockholder's equity
Vesting period for awards granted under the plans	1 year
Restricted Stock and Restricted Stock Units \| Maximum
Stockholder's equity
Vesting period for awards granted under the plans	3 years
Restricted Stock \| Non-employee directors
Stockholder's equity
Vesting period for awards granted under the plans	1 year

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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

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-Name Accounting Standards Codification
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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.

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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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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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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.

+ References

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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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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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- 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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