XML 46 R56.htm IDEA: XBRL DOCUMENT v2.4.0.8
Marketable Securities (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 30, 2014
Security
Sep. 30, 2013
Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]      
Number of securities below amortized cost basis 32    
Number of securities 74    
Proceeds from maturities of marketable securities $ 47,420 $ 63,089 $ 65,533
Available-for-sale Securities, Amortized Cost Basis 44,471 [1] 64,471 [2]  
Unrealized gains 17 10  
Unrealized losses (49) (86)  
Available-for-sale marketable securities 44,439 [1] 64,395 [2]  
Purchased and accrued interest 213 629  
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months 30,453 48,544  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months (47) (85)  
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer 748 2,001  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer (2) (1)  
Current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale securities, next twelve months, maximum year mature 1 year    
Available-for-sale Securities, Amortized Cost Basis 32,918 47,029  
Unrealized gains 3 10  
Unrealized losses (23) (33)  
Available-for-sale marketable securities 32,898 47,006  
Non-current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, year two through five, maximum year mature 3 years    
Available-for-sale Securities, Amortized Cost Basis 11,553 17,442  
Unrealized gains 14 0  
Unrealized losses (26) (53)  
Available-for-sale marketable securities 11,541 17,389  
Corporate Bonds
      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months 23,475 29,911  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months (26) (35)  
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer 0 2,001  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer 0 (1)  
Corporate Bonds | Current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 24,668 35,161  
Unrealized gains 1 10  
Unrealized losses (22) (30)  
Available-for-sale marketable securities 24,647 35,141  
Corporate Bonds | Non-current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 2,051 6,439  
Unrealized gains 0 0  
Unrealized losses (4) (6)  
Available-for-sale marketable securities 2,047 6,433  
Commercial Paper
      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months 3,998    
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months (1)    
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer 0    
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer 0    
Commercial Paper | Current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 3,998    
Unrealized gains 0    
Unrealized losses (1)    
Available-for-sale marketable securities 3,997    
Certificates of Deposit
      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months 2,980 12,451  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months (20) (49)  
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer 748 0  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer (2) 0  
Certificates of Deposit | Current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 4,252 1,753  
Unrealized gains 2 0  
Unrealized losses 0 (2)  
Available-for-sale marketable securities 4,254 1,751  
Certificates of Deposit | Non-current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 9,502 11,003  
Unrealized gains 14 0  
Unrealized losses (22) (47)  
Available-for-sale marketable securities 9,494 10,956  
Government Municipal Bonds
      
Schedule of Available-for-sale Securities [Line Items]      
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months   6,182  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for less than twelve months   (1)  
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer   0  
Unrealized losses of available-for-sale securities in continuous unrealized loss position for twelve months or longer   0  
Government Municipal Bonds | Current Assets
      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Amortized Cost Basis   10,115  
Unrealized gains   0  
Unrealized losses   (1)  
Available-for-sale marketable securities   $ 10,114  
[1] Included in amortized cost and fair value is purchased and accrued interest of $213.
[2] Included in amortized cost and fair value is purchased and accrued interest of $629