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Significant Accounting Policies Recently Issued Accounting Pronouncements (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Excess Tax Benefit from Share-based Compensation, Operating Activities $ 0 $ 584
Excess Tax Benefit from Share-based Compensation, Financing Activities 0 $ 584
Accounting Standards Update 2016-09 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Increase (Decrease) in Income Taxes $ (500)  
Change in Effective Income Tax Rate Due to Excess Tax Benefits Recognized from Share-Based Compensation (1.00%)  
Excess Tax Benefit from Share-based Compensation, Operating Activities $ 500