SENIOR CONVERTIBLE NOTES (Tables) - Senior Convertible Notes
 3 Months Ended
Apr. 30, 2018
SENIOR CONVERTIBLE NOTES  
Schedule of 3.75% Senior Convertible Notes
The Company’s 3.75% senior convertible notes issued on April 24, 2012 (“senior convertible notes”) consist of the following:
 
April 30, 2018
 
January 31, 2018
 
(in thousands except conversion
rate and conversion price)
Principal value
$
65,644

 
$
65,644

Unamortized debt discount
(2,029
)
 
(2,497
)
Unamortized debt issuance costs
(264
)
 
(328
)
Carrying value of senior convertible notes
$
63,351

 
$
62,819

 
 
 
 
Carrying value of equity component, net of deferred taxes
$
14,923

 
$
14,923

 
 
 
 
Conversion rate (shares of common stock per $1,000 principal amount of notes)
23.1626

 
 
Conversion price (per share of common stock)
$
43.17

 
 
Senior Convertible Notes Interest Expense
The Company recognized interest expense associated with its senior convertible notes as follows:
 
Three Months Ended April 30,
 
2018
 
2017
 
(in thousands)
Cash Interest Expense
 
 
 
Coupon interest expense
$
605

 
$
783

Noncash Interest Expense
 
 
 
Amortization of debt discount
469

 
571

Amortization of transaction costs
64

 
80

 
$
1,138

 
$
1,434