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Income Taxes - Reconciliation of Income Taxes by Jurisdiction (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jan. 31, 2014
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2012
Jul. 31, 2012
Apr. 30, 2012
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Income (loss) before income taxes is attributable to the following jurisdictions:                      
Domestic                 $ (4,323) $ (2,824) $ 14,875
Foreign                 10,349 16,348 19,455
Total                 6,026 13,524 34,330
Current:                      
Domestic                 802 (2,306) 4,090
Foreign                 2,660 3,229 6,204
Total                 3,462 923 10,294
Deferred:                      
Domestic                 (3,039) (4,757) 1,042
Foreign                 835 307 (1,327)
Total                 (2,204) (4,450) (285)
Income tax expense (benefit) $ 397 $ (478) $ (273) $ 1,612 $ (50) $ (956) $ (5,128) $ 2,607 $ 1,258 $ (3,527) $ 10,009