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Earnings Per Share - Earnings per share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share [Abstract]      
Weighted average common shares oustanding during the period-shares used for basic earnings per common share 9,523 9,360 9,284
Common shares issuable under share based payment plans which are potentially dilutive 82 114 167
Common shares used for diluted earnings per common share 9,605 9,474 9,451
Net income $ 15,385 $ 7,808 $ 12,211
Basic $ 1.62 $ 0.83 $ 1.32
Diluted $ 1.60 $ 0.82 $ 1.29