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Equity (Schedule of Stock Options Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Number of Shares    
Outstanding, beginning of period (in shares) 750,338  
Granted (in shares) 0  
Exercised (in shares) (26,151)  
Forfeited (in shares) (1,300)  
Expired (in shares) (124,915)  
Outstanding, end of period (in shares) 597,972  
Exercisable (in shares) 531,911  
Weighted Average Exercise Price    
Outstanding, beginning of period (in usd per share) $ 16.84  
Granted (in usd per share) 0.00  
Exercised (in usd per share) 3.99  
Forfeited (in usd per share) 4.11  
Expired (in usd per share) 19.91  
Outstanding, end of period (in usd per share) 16.79  
Exercisable (in usd per share) $ 18.30  
Weighted Average Remaining Contractual Life (in years):    
Outstanding 2 years 5 months 9 days  
Exercisable 1 year 8 months 1 day  
Vested and expected to vest    
Number of stock options (in shares) 586,261  
Weighted average exercise price (in usd per share) $ 17.03  
Weighted average remaining contractual term 2 years 3 months 22 days  
Aggregate Intrinsic Value    
Intrinsic value of shares exercised $ 120 $ 80
Outstanding 1,101  
Exercisable 832  
Vested and expected to vest $ 1,054