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Stock-Based Compensation (Summarized Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Stock-Based Compensation [Abstract]        
Outstanding, Number of shares, Beginning Balance 2,077,524 2,401,169 2,401,169  
Exercised, Number of shares   (323,645)    
Expired unexercised, Number of shares (474,443)      
Outstanding, Number of shares, Ending Balance 1,603,081 2,077,524 2,077,524 2,401,169
Exercisable, Number of Shares 1,448,278      
Vested and expecting to vest, Number of shares 1,603,081      
Outstanding, Weighted average exercise price, Beginning Balance $ 15.92 $ 15.34 $ 15.34  
Exercised, Weighted average exercise price   11.62    
Expired unexercised, Weighted average exercise price 22.51      
Outstanding, Weighted average exercise price, Ending Balance 13.98 $ 15.92 $ 15.92 $ 15.34
Exercisable, Weighted average exercise price 14.28      
Vested and expecting to vest, Weighted average exercise price $ 13.98      
Outstanding, Weighted average remaining contractual term (in years) 4 years 3 months 4 years 29 days 3 years 7 months 24 days 4 years 8 months 27 days
Exercisable, Weighted Average Remaining Contractual Term (in years) 3 years 10 months 13 days      
Vested and expecting to vest, Weighted Average Remaining Contractual Term (in years) 4 years 3 months      
Outstanding, Aggregate Intrinsic Value, Beginning Balance $ 926 $ 11,516 $ 11,516  
Exercised, Aggregate Intrinsic Value   2,669    
Outstanding, Aggregate Intrinsic Value, Ending Balance 1,685 $ 3,623 $ 926 $ 11,516
Exercisable, Aggregate Intrinsic Value 1,646      
Vested and expecting to vest, Aggregate Intrinsic Value $ 1,685