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Long-Term Debt - Additional Information (Details) - USD ($)
6 Months Ended
Dec. 31, 2016
Jul. 02, 2016
Line of Credit Facility [Line Items]    
Current maturities of long-term debt $ 22,000,000 $ 0
Unsecured Debt    
Line of Credit Facility [Line Items]    
Borrowings outstanding under the revolving credit facility $ 97,000,000 $ 107,600,000
Effective interest rate (in percent) 3.81%  
Long-term debt, notes $ 100,000,000  
Outstanding balance, notes 100,000,000  
Unsecured Debt | Unsecured Senior Notes 1    
Line of Credit Facility [Line Items]    
Long-term debt, notes $ 50,000,000  
Debt instrument, interest rate, stated percentage 3.73%  
Unsecured Debt | Unsecured Senior Notes 2    
Line of Credit Facility [Line Items]    
Long-term debt, notes $ 50,000,000  
Debt instrument, interest rate, stated percentage 3.88%  
Unsecured revolving credit facility    
Line of Credit Facility [Line Items]    
Revolving credit facility $ 350,000,000.0  
Additional borrowing capacity 200,000  
Maximum borrowing capacity, including additional borrowing capacity 550,000  
Borrowings outstanding under the revolving credit facility 97,000,000  
Letters of credit sub-limit 45,000,000  
Letters of credit outstanding $ 0  
Fee payment on unused credit balances (in percent) 0.15%  
Effective interest rate (in percent) 1.78%  
Unsecured revolving credit facility | Minimum    
Line of Credit Facility [Line Items]    
Interest rate spread on notes (in percent) 1.00%  
Unsecured revolving credit facility | Maximum    
Line of Credit Facility [Line Items]    
Interest rate spread on notes (in percent) 1.75%  
Secured revolving credit facility    
Line of Credit Facility [Line Items]    
Revolving credit facility $ 50,000,000  
Interest rate spread on notes (in percent) 0.75%  
Borrowings outstanding under the revolving credit facility $ 19,548,000  
Letters of credit outstanding $ 30,452,000  
Fee payment on unused credit balances (in percent) 0.26%  
Effective interest rate (in percent) 1.37%  
Interest rate on letters of credit outstanding 0.80%