FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details) (Recurring, USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jan. 31, 2014
Level 1
Assets:
Money market funds	$ 376	$ 14,023
Commercial Paper (with remaining maturities of three months or less at time of purchase, classified within cash and cash equivalents)	0	0
Short-term investments, classified as available-for-sale	0	0
Foreign currency forward contracts	0	0
Total assets	376	14,023
Liabilities:
Foreign currency forward contracts	0	0
Contingent consideration- business combinations	0	0
Total liabilities	0	0
Level 2
Assets:
Money market funds	0	0
Commercial Paper (with remaining maturities of three months or less at time of purchase, classified within cash and cash equivalents)	2,825	49,991
Short-term investments, classified as available-for-sale	13,869	9,406
Foreign currency forward contracts	2,629	2,466
Total assets	19,323	61,863
Liabilities:
Foreign currency forward contracts	201	846
Contingent consideration- business combinations	0	0
Total liabilities	201	846
Level 3
Assets:
Money market funds	0	0
Commercial Paper (with remaining maturities of three months or less at time of purchase, classified within 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
Contingent consideration- business combinations	15,721	17,307
Total liabilities	$ 15,721	$ 17,307