BUSINESS REORGANIZATION (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2017 USD ($) location	Jun. 30, 2016 USD ($)	Mar. 31, 2017 USD ($) location
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 10,599	$ 0
Accrued Expenses and Other Current Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			$ 65,935
Fiscal 2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10,599
Fiscal 2018 Plan | Accrued Expenses and Other Current Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	5,024
Fiscal 2018 Plan | Other long-term liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 3,197
Fiscal 2016 Plan
Restructuring Cost and Reserve [Line Items]
Number of locations reorganized | location	1
Number of studios closed | location			2
Fiscal 2016 Plan | Accrued Expenses and Other Current Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 65,935
Reorganization Activities | Fiscal 2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,378