Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 31, 2016	Jan. 31, 2016
Cycleo [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period over which contingent consideration is valued	4 years
Earn-out Payable Within First Three Fiscal Years Of Acquisition Date [Member] | Triune Systems [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period over which contingent consideration is valued	2 years
Level 2 [Member] | Term Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 67.8	$ 77.1
Level 2 [Member] | Revolving Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 181.0	$ 181.0