FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details) - Recurring - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Level 1
Assets:
Money market funds	$ 175	$ 12,137
Foreign currency forward contracts	0	0
Commercial paper and corporate debt securities, classified as cash and cash equivalents		0
Short-term investments, classified as available-for-sale		0
Total assets	175	12,137
Liabilities:
Foreign currency forward contracts	0	0
Contingent consideration- business combinations	0	0
Option to acquire noncontrolling interests of consolidated subsidiaries	0
Total liabilities	0	0
Level 2
Assets:
Money market funds	0	0
Foreign currency forward contracts	1,646	113
Commercial paper and corporate debt securities, classified as cash and cash equivalents		5,030
Short-term investments, classified as available-for-sale		52,932
Total assets	3,075	58,075
Liabilities:
Foreign currency forward contracts	1,246	2,377
Contingent consideration- business combinations	0	0
Option to acquire noncontrolling interests of consolidated subsidiaries	0
Total liabilities	1,654	2,377
Level 3
Assets:
Money market funds	0	0
Foreign currency forward contracts	0	0
Commercial paper and corporate debt securities, classified as cash and cash equivalents		0
Short-term investments, classified as available-for-sale		0
Total assets	0	0
Liabilities:
Foreign currency forward contracts	0	0
Contingent consideration- business combinations	52,733	22,391
Option to acquire noncontrolling interests of consolidated subsidiaries	3,550
Total liabilities	56,283	$ 22,391
Interest Rate Swap | Level 1
Assets:
Interest rate swap agreement	0
Liabilities:
Interest rate swap agreement	0
Interest Rate Swap | Level 2
Assets:
Interest rate swap agreement	1,429
Liabilities:
Interest rate swap agreement	408
Interest Rate Swap | Level 3
Assets:
Interest rate swap agreement	0
Liabilities:
Interest rate swap agreement	$ 0