XML 19 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Foreign Exchange Contract    
Tax expense (benefit) on unrealized gain (loss) on cash flow hedge derivative instruments $ 0 $ 0
Tax expense (benefit) on reclassification of gain (loss) on foreign currency contract cash flow hedge derivative instruments 0 0
Cash Flow Hedges    
Tax expense (benefit) on unrealized gain (loss) on cash flow hedge derivative instruments 0 19
Tax expense (benefit) on reclassification of gain (loss) on foreign currency contract cash flow hedge derivative instruments $ 0 $ (326)