FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands |
Apr. 30, 2016 |
Jan. 31, 2016 |
Apr. 30, 2015 |
Jan. 31, 2015 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
|
| Liability related to interest rate swap |
|
$ (706)
|
$ (675)
|
|
|
| Cash and cash equivalents deposited with commercial banks |
|
139,878
|
137,731
|
$ 130,864
|
$ 120,526
|
| Reported Value Measurement [Member] |
|
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
|
| Cash and cash equivalents deposited with commercial banks |
|
27,000
|
24,000
|
|
|
| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring [Member] |
|
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
|
| Money market mutual funds |
[1] |
112,792
|
113,984
|
|
|
| Significant Other Observable Inputs (Level 2) [Member] | Recurring [Member] |
|
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
|
|
| Liability related to interest rate swap |
[2] |
$ (705)
|
$ (675)
|
|
|
|
|