Income Taxes (Tables)

12 Months Ended

Sep. 30, 2011

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

			2011		2010		2009
United States
	Current payable
		Federal	$	20,741	$	17,060	$	13,868
		State		3,696		2,751		2,379
	Deferred
		Federal		628		538		(136)
		State		120		95		(25)
Total U.S. tax expense				25,185		20,444		16,086
International
	Current payable			1,109		826		-
	Deferred			(174)		(384)		-
Total international tax expense				935		442		-
Total income tax expense			$	26,120	$	20,886	$	16,086

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		2011		2010
Deferred tax assets:
	Allowance for doubtful accounts	$	1,005	$	996
	Inventories		363		358
	Revenue recognition		-		175
	Lease expense		282		192
	Employee benefits		740		1,012
	Other		325		456
Total deferred tax assets			2,715		3,189
Deferred tax liabilities:
	Property and equipment		(6,534)		(6,481)
	Prepaid expenses		(316)		(306)
	Other		(182)		(156)
Total deferred tax liabilities			(7,032)		(6,943)
Net deferred tax assets/(liabilities)		$	(4,317)	$	(3,754)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2011		2010		2009
Taxes computed at statutory rate		35.0%		35.0%		35.0%
State income taxes (net of federal income tax benefit)		3.7		3.5		3.8
Foreign		(0.9)		(1.1)		-
Other		0.2		1.0		0.4
		38.0%		38.4%		39.2%

Summary of Income Tax Contingencies [Table Text Block]

	2011		2010		2009
Unrecognized tax benefits – Beginning of year	$	198	$	223	$	523
Gross decreases related to prior period tax positions		(175)		-		(54)
Gross increases related to current period tax positions		-		175		182
Settlements		-		(200)		(428)
Unrecognized tax benefits – End of year	$	23	$	198	$	223