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SHARE BASED COMPENSATION (Details) | 12 Months Ended
--- | ---
Apr. 30, 2015 USD ($) PerformanceObjective $ / shares shares | Apr. 30, 2014 USD ($) $ / shares shares | Apr. 30, 2013 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 2,215,000 | $ 1,162,000 | $ 45,000
Restricted Stock [Member] |  |  |
Restricted share awards, shares [Roll Forward] |  |  |
Unvested, beginning of period (in shares) | shares | 104,855 | 0 |
Granted (in shares) | shares | 107,536 | 104,855 |
Vested during year (in shares) | shares | (79,181) |  |
Forfeited (in shares) | shares | (25,674) |  |
Unvested, end of period (in shares) | shares | 107,536 | 104,855 | 0
Weighted avg grant-date fair value [Abstract] |  |  |
Unvested, beginning of period (in dollars per share) | $ / shares | $ 8.72 | $ 0 |
Granted (in dollars per share) | $ / shares | 7.17 | 8.72 |
Vested during period (in dollars per share) | $ / shares | 8.72 |  |
Forfeited (in dollars per share) | $ / shares | 8.72 |  |
Unvested, end of period (in dollars per share) | $ / shares | $ 7.17 | $ 8.72 | $ 0
2008 Incentive Award Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares (in shares) | shares | 2,000,000 |  |
Term of award (in years) | 10 years |  |
Long Term Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Incentive plan award description | Three-Year Average Annual Total Shareholder Return |  |
Dividend yield (in hundredths) | 6.10% |  |
Long Term Incentive Plan [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expected volatility rate (in hundredths) | 15.00% |  |
Risk-free interest rate (in hundredths) | 0.03% |  |
Officers' total award opportunity under the LTIP stated as a percentage of base salary (in hundredths) | 50.00% |  |
Calculated grant date fair value as a percentage of base salary for officers (in hundredths) | 47.00% |  |
Long Term Incentive Plan [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expected volatility rate (in hundredths) | 20.00% |  |
Risk-free interest rate (in hundredths) | 0.09% |  |
Officers' total award opportunity under the LTIP stated as a percentage of base salary (in hundredths) | 100.00% |  |
Calculated grant date fair value as a percentage of base salary for officers (in hundredths) | 94.00% |  |
Long Term Incentive Plan [Member] | Unrestricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of awards payable (in hundredths) | 50.00% |  |
Performance period (in years) | 1 year |  |
Restricted shares vesting period | 1 year |  |
Long Term Incentive Plan [Member] | Unrestricted Stock [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of performance objectives to meet | PerformanceObjective | 1 |  |
Long Term Incentive Plan [Member] | Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of awards payable (in hundredths) | 50.00% |  |
Performance period (in years) | 2 years |  |
Long Term Incentive Plan [Member] | Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense |  |  | $ 0
Long Term Incentive Plan [Member] | Performance Shares [Member] | 2015 Performance Period [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 1,300,000 |  |
Long Term Incentive Plan [Member] | Performance Shares [Member] | 2014 Performance Period [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 690,000 | $ 914,000 |
Trustee Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 39,139 | 28,976 | 15,975
Restricted Share Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total fair value of share grants vested | 568,000 | $ 0 | $ 0
Total compensation cost related to non-vested share awards | $ 771,000 |  |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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