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Fair Value Measurement Level 3 Unobservable Inputs (Details)
$ in Thousands
3 Months Ended
Apr. 30, 2016
USD ($)
year
Unobservable Inputs [Abstract]  
Total estimated contingent consideration, low | $ $ 40
Total estimated contingent consideration, high | $ $ 2,935
Discount rate, low 9.50%
Discount rate, high 15.00%
Timing of cash flows (in years), low | year 0
Timing of cash flows (in years), high | year 2