| 
           Long-Term Debt (Schedule of Outstanding Debt) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        6 Months Ended | 12 Months Ended | 
|---|---|---|
| 
           Mar. 31, 2014 
         | 
        
           Sep. 30, 2013 
         | 
      |
| Debt Instrument [Line Items] | ||
| Principal balance outstanding | $ 35,000 | $ 36,000 | 
| Remaining available credit | 60,000 | 60,000 | 
| 
           Revolving Line of Credit [Member] 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Principal balance outstanding | ||
| Remaining available credit | 60,000 | 60,000 | 
| Effective interest rate | 2.40% | 2.43% | 
| Scheduled maturity date | Oct. 01, 2020 | Oct. 01, 2020 | 
| 
           Term Loan [Member] 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Principal balance outstanding | 35,000 | 36,000 | 
| Remaining available credit | ||
| Effective interest rate | 2.65% | 2.68% | 
| Scheduled maturity date | Oct. 01, 2020 | Oct. 01, 2020 | 
| X | ||||||||||
| 
             
- Definition 
          Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |