Common Stock (Tables)

12 Months Ended

Sep. 30, 2012

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Common Stock Options Activity [Table Text Block]

A summary of common stock options activity under the 2002 and 2005 Plans are as follows:
	2012			2011				2010
		Weighted				Weighted				Weighted
	Number	average		Number		average		Number		average
	of	exercise		of		exercise		of		exercise
	Shares	price		Shares		price		Shares		price
Outstanding at beginning of year	37,385	$	14.73		139,550	$	4.65		339,404	$	3.11
Exercised	(14,769)		10.44		(102,128)		0.96		(199,670)		2.02
Cancelled or expired	(256)		17.00		(37)		17.00		(184)		17.00
Outstanding at end of year	22,360	$	17.53		37,385	$	14.73		139,550	$	4.65
Exercisable at end of year	22,360	$	17.53		37,385	$	14.73		139,550	$	4.65

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

A summary of restricted stock awards activity under the 2005 Plan are as follows:
	2012			2011				2010
		Weighted				Weighted				Weighted
	Number	average		Number		average		Number		average
	of	grant date		of		grant date		of		grant date
	Shares	fair value		Shares		fair value		Shares		fair value
Nonvested at beginning of year	105,540	$	61.69		70,584	$	49.33		38,388	$	38.33
Granted	74,848		101.97		63,900		71.14		58,350		55.05
Vested	(48,072)		102.09		(25,934)		52.46		(25,994)		45.99
Forfeitures	(2,920)		63.49		(3,010)		51.92		(160)		39.27
Nonvested at end of year	129,396	$	69.94		105,540	$	61.69		70,584	$	49.33

Schedule of Outstanding and Exercisable Options [Table Text Block]

	Outstanding and exercisable options
			Weighted
			average
			remaining		Weighted
			contractual		average
		Number of	life		exercise
Range of exercise prices		Shares	(in years)		price
$17.00 - $19.99		19,990		2.8	$	17.00
$20.00 - $22.60		2,370		3.0	$	22.04