Earnings Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Common Share Details [Abstract]
Net income	$ 16,781	$ 14,503	$ 48,632	$ 40,877
Weighted Average Number of Shares Outstanding, Basic	12,679	12,628	12,672	12,609
Effect Of Dilutive Securities [Abstract]
Stock Options And Restricted Stock Diluted Shares	34	34	33	29
Weighted Average Number of Shares Outstanding, Diluted	12,713	12,662	12,705	12,638
Basic EPS	$ 1.32	$ 1.15	$ 3.84	$ 3.24
Diluted EPS	$ 1.32	$ 1.15	$ 3.83	$ 3.23
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	0	0