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DISCONTINUED OPERATIONS, Effect on Net Income from Properties Classified as Discontinued Operations (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2016 USD ($) Loan | Jan. 31, 2015 USD ($) | Jan. 31, 2016 USD ($) Loan | Jan. 31, 2015 USD ($)
REVENUE [Abstract] |  |  |  |  |
Real estate rentals |  | $ 50,277 | $ 46,753 | $ 142,526 | $ 135,621
Tenant reimbursement |  | 4,492 | 5,223 | 13,466 | 15,122
TOTAL REVENUE |  | 55,772 | 52,939 | 158,998 | 153,342
EXPENSES [Abstract] |  |  |  |  |
Depreciation/amortization related to real estate investments |  | 14,789 | 12,627 | 42,522 | 37,700
Utilities |  | 3,427 | 3,564 | 9,757 | 9,533
Maintenance |  | 5,821 | 5,033 | 16,979 | 15,081
Real estate taxes |  | 5,029 | 5,284 | 14,948 | 15,052
Insurance |  | 1,214 | 1,215 | 3,558 | 3,745
Property management expenses |  | 4,676 | 3,825 | 13,182 | 10,970
Other property expenses |  | 169 | 197 | 344 | 753
Amortization related to non-real estate investments |  | 130 | 210 | 470 | 647
Impairment of real estate investments |  | 162 | 540 | 3,320 | 4,663
TOTAL EXPENSES |  | 39,344 | 36,562 | 117,603 | 111,373
Interest expense |  | (10,540) | (10,009) | (29,867) | (29,710)
Gain on extinguishment of debt |  | 0 | 0 | (106) | 0
Other income |  | 135 | 109 | 286 | 371
Gain on sale of discontinued operations |  |  |  | 25,512 | (811)
INCOME FROM DISCONTINUED OPERATIONS |  | 35,408 | 1,162 | 50,181 | 1,322
Default interest |  | 1,600 |  | 4,700 |
Non-recourse loan |  | $ 122,600 |  | $ 122,600 |
Number of loan properties | Loan |  | 9 |  | 9 |
Mendota Joint Venture Entity [Member] |  |  |  |  |
EXPENSES [Abstract] |  |  |  |  |
Income from discontinued operations attributable to noncontrolling interest |  |  |  | $ 51,400 | 1,700
Discontinued Operations [Member] |  |  |  |  |
REVENUE [Abstract] |  |  |  |  |
Real estate rentals |  | $ 3,576 | 13,687 | 21,966 | 40,780
Tenant reimbursement |  | 718 | 6,290 | 8,268 | 18,309
TOTAL REVENUE |  | 4,294 | 19,977 | 30,234 | 59,089
EXPENSES [Abstract] |  |  |  |  |
Depreciation/amortization related to real estate investments |  | 0 | 4,207 | 4,239 | 12,146
Utilities |  | 416 | 1,803 | 3,016 | 5,608
Maintenance |  | 588 | 2,766 | 4,784 | 8,310
Real estate taxes |  | 756 | 3,532 | 5,341 | 10,531
Insurance |  | 58 | 264 | 462 | 815
Property management expenses |  | 468 | 921 | 1,941 | 2,761
Other property expenses |  | 0 | 30 | 0 | 30
Amortization related to non-real estate investments |  | 105 | 706 | 1,002 | 1,981
Impairment of real estate investments |  | 0 | 0 | 440 | 1,442
TOTAL EXPENSES |  | 2,391 | 14,229 | 21,225 | 43,624
Operating income (loss) |  | 1,903 | 5,748 | 9,009 | 15,465
Interest expense | [1] | (3,436) | (4,586) | (12,832) | (14,148)
Gain on extinguishment of debt | [1] | 36,456 | 0 | 29,336 | 0
Other income |  | 154 | 0 | 427 | 5
Income from discontinued operations before gain on sale |  | 35,077 | 1,162 | 25,940 | 1,322
Gain on sale of discontinued operations |  | 331 | 0 | 24,241 | 0
INCOME FROM DISCONTINUED OPERATIONS | [2] | $ 35,408 | $ 1,162 | $ 50,181 | $ 1,322
[1] | Interest expense includes $1.6 million and $4.7 million for the three and nine months ended January 31, 2016, respectively, of default interest related to a $122.6 million non-recourse loan by one of our subsidiaries. Gain on extinguishment of debt in the three and nine months ended January 31, 2016, respectively, includes $36.5 million of gain on extinguishment of debt recognized in connection with our transfer of ownership to the mortgage lender of the nine properties serving as collateral for the $122.6 million non-recourse loan and the removal of the debt obligation and accrued interest from our balance sheet.
[2] | Discontinued operations for the nine months ended January 31, 2016 and 2015 includes a noncontrolling interest for our Mendota joint venture entity. Income from discontinued operations attributable to us was $51.4 million and $1.7 million for the nine months ended January 31, 2016 and 2015, respectively

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- Definition Utilities costs incurred during the reporting period for services, such as water, sewer, gas, electricity and telephone required to operate a building. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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