Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Reconciliation of Liabilities Measured at Fair Value on Recurring Basis (Detail)

v2.4.0.8
Fair Value Measurements - Reconciliation of Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 6 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2013
Fair Value, Inputs, Level 3 [Member]
Jan. 31, 2013
Fair Value, Inputs, Level 3 [Member]
Jul. 31, 2013
Accrued Contingent Consideration [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Ending balance January 31, 2013 $ 5,656   $ 2,435 $ 5,656 $ 5,656
Change in fair value of contingent consideration 34 1,603     34
Contingency payment         (3,206)
Translation adjustment         (49)
Ending balance July 31, 2013 $ 2,435   $ 2,435 $ 5,656 $ 2,435