Business Acquisitions (Tables)

12 Months Ended

Sep. 30, 2012

Business Combination Schedules [Abstract]

Fair Value By Balance Sheet Grouping [Table Text Block]

		2012		2011		2010
Cash	$	1	$	-	$	674
Receivables		22,374		4,041		32,371
Inventories		27,701		3,594		17,830
Other current assets		105		-		480
Property and equipment		8,882		1,900		5,275
Investments		199		-		-
Goodwill		12,473		1,823		9,483
Intangibles		15,760		140		17,658
Total assets acquired		87,495		11,498		83,771
Accounts payable		25,026		4,498		25,811
Accrued expenses		1,591		-		5,299
Other liabilities		-		-		10,476
Total liabilities assumed		26,617		4,498		41,586
Net assets acquired	$	60,878	$	7,000	$	42,185

Segment Operating Results [Table Text Block]

	Micro's operations included in MWI's results
			Fiscal year ended September 30, 2012
Revenues		$	246,624
Net Income		$	4,089

Busniess Acquisition Pro Forma Information [Table Text Block]

		Unaudited Pro Forma Consolidated Results
		Fiscal year ended September 30,
		2012		2011		2010
Revenues	$	2,097,076	$	1,793,672	$	1,408,302
Net Income	$	53,571	$	45,769	$	35,190