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Long -Term Debt and Capital Leases - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 07, 2018
Nov. 07, 2012
Feb. 14, 2012
Jun. 30, 2018
Jun. 30, 2017
Long Term Debt and Capital Leases (Additional Textual) [Abstract]          
Long-term Debt, Maturities, Repayments of Principal in 2022       $ 300,000  
Future Principal Maturities of Long-term Debt in 2028       300,000  
Capital Lease Obligations       $ 0 $ 190
US Dollar Denominated Borrowings [Member]          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Debt Instrument, Interest Rate, Stated Percentage       0.00% 0.00%
Capital Lease Obligations [Member]          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Debt Instrument, Interest Rate, Stated Percentage       0.00% 3.90%
4.625% Senior Unsecured Notes Due in 2028          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Debt Instrument, Interest Rate, Stated Percentage 4.625%        
Debt Instrument, Unamortized Discount       $ 2,200 $ 0
Long Term Debt and Capital Leases (Additional Textual) [Abstract]          
Proceeds from Issuance of Senior Long-term Debt $ 300,000        
2.650% Senior Notes due 2019 [Member]          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Debt Instrument, Interest Rate, Stated Percentage   2.65%      
Debt Instrument, Unamortized Discount       100 200
Long Term Debt and Capital Leases (Additional Textual) [Abstract]          
Proceeds from Issuance of Senior Long-term Debt   $ 400,000      
3.875% Senior Unsecured Notes Due in 2022 [Member]          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Debt Instrument, Interest Rate, Stated Percentage     3.875%    
Debt Instrument, Unamortized Discount       100 $ 200
Long Term Debt and Capital Leases (Additional Textual) [Abstract]          
Proceeds from Issuance of Senior Long-term Debt     $ 300,000    
Twenty Eighteen Credit Agreement [Member] [Domain]          
Long-Term Debt and Capital Leases (Textual) [Abstract]          
Maximum Borrowing Capacity under the 2018 Credit Agreement $ 700,000        
Borrowing outstanding under 2018 Credit Agreement       $ 0  
Term of Long Term Debt       5 years