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Income Taxes Domestic and Foreign Pre-tax Income (Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Disclosure Domestic and Foreign Pretax Income Loss [Abstract]      
Domestic $ (31,914) $ (25,971) $ (2,991)
Foreign 216,770 144,900 170,749
Total pre-tax income $ 184,856 $ 118,929 $ 167,758