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Stockholders' Equity (Narrative) (Details)
$ / shares in Units, $ in Millions
9 Months Ended
Mar. 31, 2017
USD ($)
StockIncentivePlan
$ / shares
shares
Sep. 06, 2016
$ / shares
shares
Jul. 01, 2016
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of rights declared as dividend for each share of outstanding common stock   1  
Common stock par value | $ / shares $ 0.01 $ 0.01 $ 0.01
Preferred stock, par value | $ / shares $ 0.01 0.01 $ 0.01
Exercise price of right | $ / shares   $ 35.00  
Performance stock unit (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
2007 Stock Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of stock incentive plans | StockIncentivePlan 1    
Options expired 34,826    
Number of shares available for grant 268,191    
2007 Stock Plan | Performance stock unit (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted 72,941    
2007 Stock Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted 237,874    
Awards canceled 14,277    
2007 Stock Plan | Market-Based Stock Units (MSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted 50,000    
Awards canceled 7,219    
Options canceled 37,999    
Award cancelled due to performance target not achieved 48,626    
2007 Stock Plan | Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards canceled 983    
2007 Stock Plan | Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested awards, unrecognized compensation expense | $ $ 0.2    
Nonvested awards, expense expected to be recognized, weighted average period 1 year 4 months 3 days    
2007 Stock Plan | Restricted stocks units and performance stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested awards, unrecognized compensation expense | $ $ 3.8    
Nonvested awards, expense expected to be recognized, weighted average period 1 year 11 months 2 days    
Preferred Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of preferred stocks to be purchased with each right   0.001