FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
4.625% Notes due February 2020
Other financial instruments
Debt instrument interest rate (as a percent)	4.625%
5.000% Notes due February 2023
Other financial instruments
Debt instrument interest rate (as a percent)	5.00%
Level 1 | 4.625% Notes due February 2020
Other financial instruments
Debt instrument interest rate (as a percent)	4.625%	4.625%
Carrying Amount
Other financial instruments
Fair Value	2,067,500	2,100,000
Carrying Amount | Level 1 | Term Loan, including current portion, due in installments through August 2018
Other financial instruments
Fair Value	592,500	600,000
Carrying Amount | Level 1 | Term Loan, including current portion, due in installments through March 2019
Other financial instruments
Fair Value	475,000	500,000
Carrying Amount | Level 1 | 4.625% Notes due February 2020
Other financial instruments
Fair Value	500,000	500,000
Carrying Amount | Level 1 | 5.000% Notes due February 2023
Other financial instruments
Fair Value	500,000	500,000
Total
Other financial instruments
Fair Value	2,114,531	2,111,278
Total | Level 1 | Term Loan, including current portion, due in installments through August 2018
Other financial instruments
Fair Value	582,131	591,750
Total | Level 1 | Term Loan, including current portion, due in installments through March 2019
Other financial instruments
Fair Value	465,500	497,190
Total | Level 1 | 4.625% Notes due February 2020
Other financial instruments
Fair Value	523,750	504,688
Total | Level 1 | 5.000% Notes due February 2023
Other financial instruments
Fair Value	543,150	517,650