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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Apr. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of accumulated other comprehensive income (loss), net of tax
The following table summarizes the components of accumulated other comprehensive loss, net of tax:
As of
April 30, 2015
 
January 31, 2015
Foreign currency translation adjustment
$
(11,477
)
 
$
(12,044
)
Unrealized gain (loss) on derivatives
(19
)
 
42

Pension liability
113

 
115

Total accumulated other comprehensive loss
$
(11,383
)
 
$
(11,887
)