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Debt (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Line of Credit Facility [Line Items]    
Senior Notes $ 275,000 $ 275,000
Short-term debt 18,001 21,057
Long-term debt 637,316 493,039
Debt, Carrying Value 655,317 514,096
Other Long-term Debt $ 10,533 11,536
Description of variable rate basis LIBOR  
Debt Instrument, Unamortized Discount $ (8,544) (8,940)
Exagroup SAS [Member]    
Line of Credit Facility [Line Items]    
Other Long-term Debt 10,282  
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Short-term debt 0 4,500
Debt Instrument, Unamortized Discount 1,665 1,662
Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
Debt, Carrying Value [1] 378,328 $ 232,000
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Current borrowing capacity $ 842,000  
Line of Credit [Member] | Minimum [Member]    
Line of Credit Facility [Line Items]    
Basis spread on LIBOR 1.50%  
Commitment fee (percentage) 0.225%  
Line of Credit [Member] | Maximum [Member]    
Line of Credit Facility [Line Items]    
Basis spread on LIBOR 2.25%  
Commitment fee (percentage) 0.40%  
Revolving Loan, Maturity September 23, 2019 [Member]    
Line of Credit Facility [Line Items]    
Weighted average interest rate 2.26%  
Term Loan [Domain] | Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Long-term Debt, Gross $ 152,000  
Senior Notes [Member]    
Line of Credit Facility [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 7.00%  
Revolving Loan, Maturity September 23, 2019 [Member] | Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 690,000  
[1] (1) Balances as of September 30, 2015 and June 30, 2015 are inclusive of short-term debt issuance costs and debt discounts of $1,665 and $1,662, respectively.