BANK BORROWINGS AND LONG-TERM DEBT (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Mar. 31, 2014
Bank borrowings and long-term debt    
Carrying Amount $ 2,083,733 $ 2,102,595
Current portion (46,162) (32,575)
Non-current portion 2,037,571 2,070,020
Weighted average interest rate (as a percent) 3.20% 3.20%
Term Loan, including current portion, due in installments through August 2018    
Bank borrowings and long-term debt    
Carrying Amount 592,500 600,000
Term Loan, including current portion, due in installments through March 2019    
Bank borrowings and long-term debt    
Carrying Amount 475,000 500,000
4.625% Notes due February 2020    
Bank borrowings and long-term debt    
Carrying Amount 500,000 500,000
Debt instrument interest rate (as a percent) 4.625%  
5.000% Notes due February 2023    
Bank borrowings and long-term debt    
Carrying Amount 500,000 500,000
Debt instrument interest rate (as a percent) 5.00%  
Other    
Bank borrowings and long-term debt    
Carrying Amount $ 16,233 $ 2,595