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