RESTRUCTURING CHARGES - Provisions, Respective Payments and Remaining Accrued Balance (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Summarizes the provisions, respective payments, and remaining accrued balance
Balance at the beginning of the period				$ 13,240	$ 15,057	$ 42,396
Provision for charges incurred	$ 20,435	$ 17,421	$ 11,539	49,395
Balance at the end of the period	23,501			23,501	13,240	15,057
Less: Current portion (classified as other current liabilities)	23,501			23,501
Accrued restructuring costs, net of current portion (classified as other liabilities)	0			0
Fiscal Year 2014
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				(13,240)	(1,817)	(27,339)
Fiscal Year 2017
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				(25,894)
Provision for charges incurred				49,395
Severance
Summarizes the provisions, respective payments, and remaining accrued balance
Balance at the beginning of the period				11,905	13,363	36,493
Provision for charges incurred	13,782	16,932	11,539	42,253
Balance at the end of the period	16,359			16,359	11,905	13,363
Less: Current portion (classified as other current liabilities)	16,359			16,359
Accrued restructuring costs, net of current portion (classified as other liabilities)	0			0
Severance | Fiscal Year 2014
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				(11,905)	(1,458)	(23,130)
Severance | Fiscal Year 2017
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				(25,894)
Provision for charges incurred				42,253
Other exit costs
Summarizes the provisions, respective payments, and remaining accrued balance
Balance at the beginning of the period				1,335	1,694	5,903
Provision for charges incurred	6,653	$ 489	$ 0	7,142
Balance at the end of the period	7,142			7,142	1,335	1,694
Less: Current portion (classified as other current liabilities)	7,142			7,142
Accrued restructuring costs, net of current portion (classified as other liabilities)	$ 0			0
Other exit costs | Fiscal Year 2014
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				(1,335)	$ (359)	$ (4,209)
Other exit costs | Fiscal Year 2017
Summarizes the provisions, respective payments, and remaining accrued balance
Cash payments for charges incurred				0
Provision for charges incurred				$ 7,142