v2.4.0.6
Long-term Debt (Details 2) (USD $)
Mar. 31, 2013
Future minimum repayments of long-term debt  
Within one year $ 88,368,000
1-3 years 238,633,000
3-5 years 775,543,000
Over 5 years 1,512,582,000
Total minimum payments 2,615,126,000
Letters of credit outstanding 73,200,000
Available borrowing capacity 711,800,000
Senior secured credit facility
 
Long-term Debt  
Term loan amount outstanding 2,278,100,000
Revolving credit facility
 
Long-term Debt  
Revolving credit facility amount outstanding 0
Variable rate Term Loan A
 
Long-term Debt  
Term loan amount outstanding 1,028,800,000
Variable rate Term Loan B
 
Long-term Debt  
Term loan amount outstanding $ 1,249,300,000