INCOME TAXES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016	May 31, 2015
Income Tax Examination [Line Items]
Effective tax rate	21.40%	27.40%	22.00%	23.20%
Unrecognized tax benefits	$ 13,600,000		$ 13,600,000		$ 12,700,000
Accrued interest related to unrecognized tax benefits	1,800,000		1,800,000		1,600,000
Accrued penalties	$ 0		$ 0		$ 0
5.50% Senior Notes [Member] | Senior Notes [Member]
Income Tax Examination [Line Items]
Stated interest rate of debt instrument	5.50%		5.50%			5.50%