REDEEMABLE NONCONTROLLING INTERESTS (Details) $ in Thousands |
9 Months Ended | |
|---|---|---|
|
Jan. 31, 2016
USD ($)
JointVenture
|
Jan. 31, 2015
USD ($)
|
|
| Redeemable Noncontrolling Interest [Line Items] | ||
| Balance at beginning of fiscal year | $ 6,368 | |
| Contributions | $ 8,540 | |
| Balance at close of period | $ 7,244 | |
| Number of joint ventures | JointVenture | 1 | |
| Agreement period of joint venture | 4 years | |
| Southgate - Minot, ND [Member] | ||
| Redeemable Noncontrolling Interest [Line Items] | ||
| Balance at beginning of fiscal year | $ 6,368 | |
| Contributions | 1,120 | |
| Net (loss) income | (244) | |
| Balance at close of period | $ 7,244 | |