| 
           Long-Term Debt (Schedule of Interest Costs) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | ||
|---|---|---|---|
| 
           Sep. 30, 2014 
         | 
        
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2012 
         | 
      |
| Long-Term Debt [Abstract] | |||
| Interest expense | $ 969 | $ 1,257 | $ 1,616 | 
| Interest capitalized | 204 | 79 | 100 | 
| Total interest cost | $ 1,173 | $ 1,336 | $ 1,716 | 
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- Definition 
          Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Total interest costs incurred during the period and either capitalized or charged against earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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