This line item represents the restricted stock unit awards approved by the Board of Directors.

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- Definition

The aggregate estimated grant date fair value of equity-based awards issued during the period.

+ References

No definition available.

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- Definition

Vesting date of performance based awards under share based compensation arrangement.

+ References

No definition available.

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- Definition

Performance metric for performance-based restricted stock units.

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No definition available.

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- Definition

Performance metric for performance-based restricted stock units before income tax provision.

+ References

No definition available.

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- Definition

Percentage of shares issuable upon settlement under equity-based awards under share-based compensation arrangement.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

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.

+ References

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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://www.xbrl.org/2003/role/presentationRef
-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=96867065&loc=d3e5070-113901

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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.

+ References

No definition available.

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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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EQUITY COMPENSATION PLANS AND SHARE-BASED COMPENSATION, Restricted Stock Units (Performance Vesting) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2016	Dec. 31, 2016	Dec. 31, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Apr. 30, 2018	Apr. 30, 2017	Jan. 25, 2017	Apr. 30, 2015
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense				$ 8.0
Weighted average service period for recognition of unrecognized compensation costs				1 year 4 months 24 days
Restricted Stock Unit Activity, Number of Shares [Roll Forward]
Granted (in shares)				137,000	152,000	187,000
FY 2016 Performance RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved restricted stock unit awards (performance vesting) (in shares)										187,000
Aggregate estimated grant date fair value										$ 10.3
FY 2016 Performance RSUs [Member] \| Target Condition One [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 90% of target
Vesting date				Third anniversary of the date of grant
FY 2016 Performance RSUs [Member] \| Target Condition Two [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 90% of target
Vesting date				Fourth anniversary of the date of grant
FY 2016 Performance RSUs [Member] \| Target Condition Three [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				>100% of target
Vesting date				Third anniversary of the date of grant
FY 2016 Performance RSUs [Member] \| Target Condition Four [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 100% of target
Vesting date				Fourth anniversary of the date of grant
FY 2017 Performance RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved restricted stock unit awards (performance vesting) (in shares)	152,000
Aggregate estimated grant date fair value	$ 6.8
Share based compensation expense		$ 0.0	$ 0.6
FY 2017 Performance RSUs Vesting 1 [Member] \| Target Condition One [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 90% of target
Vesting date				Third anniversary of the date of grant
FY 2017 Performance RSUs Vesting 1 [Member] \| Target Condition Two [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 90% of target
Vesting date				Fourth anniversary of the date of grant
FY 2017 Performance RSUs Vesting 1 [Member] \| Target Condition Three [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				>100% of target
Vesting date				Third anniversary of the date of grant
FY 2017 Performance RSUs Vesting 1 [Member] \| Target Condition Four [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				25.00%
Consolidated income from operations				> 100% of target
Vesting date				Fourth anniversary of the date of grant
FY 2017 Performance RSUs Vesting for CEO [Member] \| Target Condition One [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				18.00%
Consolidated income from operations				> 90% of target
Vesting date				Third anniversary of the date of grant
FY 2017 Performance RSUs Vesting for CEO [Member] \| Target Condition Two [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				18.00%
Consolidated income from operations				> 90% of target
Vesting date				Fourth anniversary of the date of grant
FY 2017 Performance RSUs Vesting for CEO [Member] \| Target Condition Three [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				32.00%
Consolidated income from operations				>100% of target
Vesting date				Third anniversary of the date of grant
FY 2017 Performance RSUs Vesting for CEO [Member] \| Target Condition Four [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				32.00%
Consolidated income from operations				> 100% of target
Vesting date				Fourth anniversary of the date of grant
FY 2017 Performance RSUs Vesting 1 and CEO [Member] \| Target Condition One And Two [Member]
Restricted Stock Unit Activity, Number of Shares [Roll Forward]
Granted (in shares)	68,000
FY 2017 Performance RSUs Vesting 1 and CEO [Member] \| Target Condition Three And Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate estimated grant date fair value									$ 4.0
Restricted Stock Unit Activity, Number of Shares [Roll Forward]
Granted (in shares)	84,000
FY 2018 Performance RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved restricted stock unit awards (performance vesting) (in shares)								137,000
Aggregate estimated grant date fair value								$ 6.3
FY 2018 Performance RSUs [Member] \| Target Condition One [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				50.00%
Consolidated income from operations before income tax provision				> 90% of target
Vesting date				Third anniversary of the date of grant
FY 2018 Performance RSUs [Member] \| Target Condition Two [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				50.00%
Consolidated income from operations before income tax provision				> 90% of target
Vesting date				Fourth anniversary of the date of grant
FY 2019 Performance RSUs [Member] \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved restricted stock unit awards (performance vesting) (in shares)							137,000
Aggregate estimated grant date fair value							$ 9.1
FY 2019 Performance RSUs [Member] \| Target Condition One [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				50.00%
Consolidated income from operations before income tax provision				> 95% of target
Vesting date				Third anniversary of the date of grant
FY 2019 Performance RSUs [Member] \| Target Condition Two [Member]
Performance target of restricted stock units by vesting date [Abstract]
Shares issuable upon settlement				50.00%
Consolidated income from operations before income tax provision				> 95% of target
Vesting date				Fourth anniversary of the date of grant