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Acquisitions Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 10, 2013
Business Acquisition [Line Items]
Goodwill	19,622us-gaap_Goodwill	$ 17,158us-gaap_Goodwill
TimeManagement Corporation [Member]
Business Acquisition [Line Items]
Current assets			327
Property and equipment			88
Goodwill			3,444
Developed technology			605
Total assets acquired			4,464
Total liabilities assumed (all current)			914
Net assets acquired			$ 3,550
Weighted Average Useful Life	5 years