FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details) - Recurring - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Level 1
Assets:
Money market funds	$ 168	$ 12,137
Commercial paper and corporate debt securities, classified as cash and cash equivalents	0	0
Short-term investments, classified as available-for-sale	0	0
Foreign currency forward contracts	0	0
Total assets	168	12,137
Liabilities:
Foreign currency forward contracts	0	0
Interest rate swap agreement	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
Commercial paper and corporate debt securities, classified as cash and cash equivalents	2,997	5,030
Short-term investments, classified as available-for-sale	7,320	52,932
Foreign currency forward contracts	746	113
Total assets	11,063	58,075
Liabilities:
Foreign currency forward contracts	2,471	2,377
Interest rate swap agreement	1,146
Contingent consideration - business combinations	0	0
Option to acquire noncontrolling interests of consolidated subsidiaries	0
Total liabilities	3,617	2,377
Level 3
Assets:
Money market funds	0	0
Commercial paper and corporate debt securities, classified as cash and cash equivalents	0	0
Short-term investments, classified as available-for-sale	0	0
Foreign currency forward contracts	0	0
Total assets	0	0
Liabilities:
Foreign currency forward contracts	0	0
Interest rate swap agreement	0
Contingent consideration - business combinations	31,578	22,391
Option to acquire noncontrolling interests of consolidated subsidiaries	3,434
Total liabilities	$ 35,012	$ 22,391