SUBSEQUENT EVENTS (Details) - $ / shares
|
9 Months Ended |
|
Jan. 31, 2016 |
Mar. 08, 2016 |
| Common Shares and Limited Partnership Units [Member] |
|
|
| Subsequent Event [Line Items] |
|
|
| Date declared |
Mar. 08, 2016
|
|
| Record date |
Mar. 21, 2016
|
|
| Payment date |
Apr. 01, 2016
|
|
| Series A Preferred Stock [Member] |
|
|
| Subsequent Event [Line Items] |
|
|
| Date declared |
Mar. 08, 2016
|
|
| Record date |
Mar. 21, 2016
|
|
| Payment date |
Mar. 31, 2016
|
|
| Series B Preferred Stock [Member] |
|
|
| Subsequent Event [Line Items] |
|
|
| Date declared |
Mar. 08, 2016
|
|
| Record date |
Mar. 21, 2016
|
|
| Payment date |
Mar. 31, 2016
|
|
| Subsequent Event [Member] | Common Shares and Limited Partnership Units [Member] |
|
|
| Subsequent Event [Line Items] |
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|
| Quarterly amount per share or unit (in dollars per share) |
|
$ 0.1300
|
| Subsequent Event [Member] | Series A Preferred Stock [Member] |
|
|
| Subsequent Event [Line Items] |
|
|
| Quarterly amount per share or unit (in dollars per share) |
|
0.5156
|
| Subsequent Event [Member] | Series B Preferred Stock [Member] |
|
|
| Subsequent Event [Line Items] |
|
|
| Quarterly amount per share or unit (in dollars per share) |
|
$ 0.4968
|