| 
           Legal and Settlement Recovery, Net (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 6 Months Ended | 
|---|---|---|
| 
           Mar. 31, 2012 
         | 
        
           Mar. 31, 2012 
         | 
      |
| Legal and Settlement Recovery, Net | ||
| Insurance recovery | $ 735 | $ 735 | 
| Acquisition expenses | (144) | (144) | 
| Other | (186) | |
| Legal and settlement recovery, net | $ 591 | $ 405 | 
| X | ||||||||||
| 
             
- Definition 
          Costs, net of reimbursed insurance claims, related to significant legal settlements and non-routine legal matters, including future probable legal costs estimated to be incurred in connection with those matters and expenses directly related to acquisitions. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Represents other legal and settlement expenses (recoveries). May also include costs related to acquisition activities. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |