Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Operating Leases [Line Items]      
Rent expense $ 7.2 $ 6.6 $ 7.0
Sublease income 1.1 $ 0.6  
Non-cancelable commitments $ 34.3    
Minimum      
Operating Leases [Line Items]      
Renewal term (in years) 1 year    
Maximum      
Operating Leases [Line Items]      
Renewal term (in years) 10 years