FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES
Contingent consideration paid	$ 7,400		$ (29,135)	$ 46,298
Activities related to contingent consideration
Beginning balance	15,800	16,000	11,300	25,000
Additions to accrual			4,500
Payments	7,398		7,398
Fair value adjustments		(3,700)		(12,700)
Ending balance	$ 8,402	$ 12,300	$ 8,402	$ 12,300