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FAIR VALUE MEASUREMENTS (Tables)
 12 Months Ended
Jan. 31, 2018
Fair Value Disclosures [Abstract]  
Schedule of assets and liabilities measured at fair value on recurring basis
Our assets and liabilities measured at fair value on a recurring basis consisted of the following as of January 31, 2018 and 2017: 
 
 
January 31, 2018
 
 
Fair Value Hierarchy Category
(in thousands)
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 

 
 

 
 

Money market funds
 
$
186

 
$
—

 
$
—

Short-term investments, classified as available-for-sale
 
—

 
2,002

 
—

Foreign currency forward contracts
 
—

 
3,682

 
—

Interest rate swap agreement
 
—

 
2,580

 
—

Total assets
 
$
186

 
$
8,264

 
$
—

Liabilities:
 
 

 
 

 
 

Foreign currency forward contracts
 
$
—

 
$
1,308

 
$
—

Contingent consideration - business combinations
 
—

 
—

 
62,829

Option to acquire noncontrolling interests of consolidated subsidiaries
 
—

 
—

 
2,950

Total liabilities
 
$
—

 
$
1,308

 
$
65,779

 
 
 
January 31, 2017
 
 
Fair Value Hierarchy Category
(in thousands)
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 

 
 

 
 

Money market funds
 
$
175

 
$
—

 
$
—

Foreign currency forward contracts
 
—

 
1,646

 
—

Interest rate swap agreement
 
—

 
1,429

 
—

Total assets
 
$
175

 
$
3,075

 
$
—

Liabilities:
 
 

 
 

 
 

Foreign currency forward contracts
 
$
—

 
$
1,246

 
$
—

Interest rate swap agreement
 
—

 
408

 
—

Contingent consideration - business combinations
 
—

 
—

 
52,733

Option to acquire noncontrolling interests of consolidated subsidiaries
 
—

 
—

 
3,550

Total liabilities
 
$
—

 
$
1,654

 
$
56,283
Liability for contingent consideration  
Assets and Liabilities Measured at Fair Value on Recurring Basis  
Schedule of changes in the estimated fair value using significant unobservable inputs (Level 3)
The following table presents the changes in the estimated fair values of our liabilities for contingent consideration measured using significant unobservable inputs (Level 3) for the years ended January 31, 2018 and 2017: 
 
 
Year Ended January 31,
(in thousands)
 
2018
 
2017
Fair value measurement, beginning of year
 
$
52,733

 
$
22,391

Contingent consideration liabilities recorded for business combinations
 
27,604

 
26,400

Changes in fair values, recorded in operating expenses
 
(8,324
)
 
7,255

Payments of contingent consideration
 
(9,412
)
 
(3,313
)
Foreign currency translation and other
 
228

 
—

Fair value measurement, end of year
 
$
62,829

 
$
52,733
Option to acquire noncontrolling interests  
Assets and Liabilities Measured at Fair Value on Recurring Basis  
Schedule of changes in the estimated fair value using significant unobservable inputs (Level 3)
During the year ended January 31, 2017, we acquired two majority owned subsidiaries for which we hold an option to acquire the noncontrolling interests. We account for the option as an in-substance investment in the noncontrolling common stock of each such subsidiary. We include the fair value of the option within other liabilities and do not recognize noncontrolling interests in these subsidiaries. The following table presents the change in the estimated fair value of this liability, which is measured using Level 3 inputs, for the years ended January 31, 2018 and 2017:
 
 
Year Ended January 31,
(in thousands)
 
2018
 
2017
Fair value measurement, beginning of year
 
$
3,550

 
$
—

Acquisition of option to acquire noncontrolling interests of consolidated subsidiaries
 
—

 
3,134

Change in fair value, recorded in operating expenses
 
(600
)
 
416

Fair value measurement, end of year
 
$
2,950

 
$
3,550