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Income Taxes - Unrecognized Tax Benefits (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Income Tax Disclosure [Abstract]    
Balance at October 1, $ 4,509 $ 4,191
Tax positions related to current year:    
Additions 0 0
Reductions 0 0
Tax positions related to prior years:    
Additions 234 506
Reductions (1,293) 0
Settlements with taxing authorities (302) 0
Lapses in statues of limitations (3,033) (188)
Balance at September 30, $ 115 $ 4,509