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Credit Agreements (Details) (USD $)
 6 Months Ended 9 Months Ended 6 Months Ended
Dec. 31, 2012
Mar. 31, 2013
Jun. 30, 2012
Dec. 31, 2012
2012 Term Loan [Member]
Dec. 20, 2012
2012 Term Loan [Member]
Dec. 20, 2012
2012 Term Loan Base Rate [Member]
Dec. 20, 2012
2012 Term Loan LIBOR [Member]
Jan. 22, 2013
HSBC TD US Banks Term Loan [Member]
Dec. 31, 2012
2011 Credit Agreement [Member]
Jun. 30, 2012
2011 Credit Agreement [Member]
Dec. 31, 2012
Revolving Credit Facility [Member]
Jun. 30, 2012
Revolving Credit Facility [Member]
Dec. 31, 2012
Term Loan [Member]
Jun. 30, 2012
Term Loan [Member]
Dec. 31, 2012
JP Morgan UK [Member]
Dec. 31, 2012
RBSNederlandNV [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Interest Rate Cap [Member]
Dec. 31, 2012
Interest Rate Swap [Member]
Line of Credit Facility [Line Items]                                        
Short-term Debt         $ 100,000,000     $ 25,000,000                        
Debt Instrument, Face Amount                       300,000,000   100,000,000            
Debt Instrument, Basis Spread on Variable Rate           0.75% 1.75%     1.75%                    
Short-term Debt, Weighted Average Interest Rate       3.75%                                
Proceeds from Short-term Debt   75,000,000                                    
Credit agreement maximum borrowing capacity                             4,500,000 5,000,000        
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum                             2.00% 1.00%        
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum                             4.00% 2.00%        
Line of credit facility amount outstanding                     192,500,000   92,500,000              
Line of credit facility annual principal payment in percentage                                 60.00% 5.00%    
Remaining borrowing available under revolving credit facility 107,500,000                           4,500,000 5,000,000        
Interest rate swap, fixed interest rate 1.30%                                      
Derivative interest rate cap arrangement 2.00%                                      
Principal amount of debt hedged with an interest rate swap agreement                                     50,000,000 100,000,000
Debt, Weighted Average Interest Rate                 1.85%                      
Debt Instrument, Periodic Payment, Principal 2,500,000                                      
Bank Overdrafts $ 69,200,000   $ 63,400,000