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Equity (Schedule of Restricted Stock Activity) (Details) (USD $)
6 Months Ended
Mar. 31, 2014
Number of Shares  
Non-vested as of March 31, 2014 (in shares) 1,113,047
Restricted Stock Awards
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
Number of Shares  
Non-vested as of September 30, 2013 (in shares) 99,561
Granted (in shares) 0
Vested (in shares) (92,932)
Forfeited (in shares) (2,463)
Non-vested as of March 31, 2014 (in shares) 4,166
Weighted Average Grant Date Fair Value  
Non-vested as of September 30, 2013 (in dollars per share) $ 5.84
Granted (in dollars per share) $ 0.00
Vested (in dollars per share) $ 5.68
Forfeited (in dollars per share) $ 5.68
Non-vested as of March 31, 2014 (in dollars per share) $ 9.64
Restricted Stock Disclosures:  
Remaining unamortized stock-based compensation expense $ 3,000
Remaining unamortized stock-based compensation expense, period for recognition (in years) 0 years 1 month 2 days
Restricted Stock Units
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
Number of Shares  
Non-vested as of September 30, 2013 (in shares) 854,928
Granted (in shares) 656,750
Vested (in shares) (326,657)
Forfeited (in shares) (71,974)
Non-vested as of March 31, 2014 (in shares) 1,113,047
Weighted Average Grant Date Fair Value  
Non-vested as of September 30, 2013 (in dollars per share) $ 4.51
Granted (in dollars per share) $ 4.89
Vested (in dollars per share) $ 4.35
Forfeited (in dollars per share) $ 4.41
Non-vested as of March 31, 2014 (in dollars per share) $ 4.79
Restricted Stock Disclosures:  
Remaining unamortized stock-based compensation expense 3,900,000
Remaining unamortized stock-based compensation expense, period for recognition (in years) 2 years 2 months 12 days
Outstanding non-vested RSUs aggregate intrinsic value 5,600,000
Outstanding non-vested RSUs weighted average remaining contractual term (in years) 1 year 4 months 24 days
Share-based compensation arrangement, by share-based payment award, options, vested and expected to vest, exercisable, number 1,000,000
Share based compensation arrangement, by share based payment award, equity instruments other than options, expected to vest, intrinsic value $ 4,900,000
Share based compensation arrangement, by share based payment award, equity investments other than options, expected to vest, weighted average contractual term (in years) 1 year 4 months 24 days