Acquisitions (Tables) - immixGroup [Member]

12 Months Ended

Dec. 31, 2016

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes the allocation of the net consideration paid to the fair value of the assets acquired and liabilities assumed for the immixGroup acquisition:

Accounts receivable, net	$	145,130
Other current assets	24,181
Property, plant, and equipment	1,569
Other assets	5,313
Identifiable intangible assets	46,400
Goodwill	183,840
Accounts payable	(136,921		)
Accrued expenses	(11,736		)
Other liabilities	(5,527		)
Cash consideration paid, net of cash acquired	$	252,249

Business Acquisition, Pro Forma Information [Table Text Block]

The following table summarizes the company's consolidated results of operations for 2015 and 2014, as well as the unaudited pro forma consolidated results of operations of the company, as though the 2015 acquisitions occurred on January 1:

	For the Years Ended December 31,
	2015				2014
	As Reported		Pro Forma		As Reported		Pro Forma
Sales	$	23,282,020	$	23,684,746	$	22,768,674	$	24,189,797
Net income attributable to shareholders	497,726		500,554		498,045		518,859
Net income per share:
Basic	$	5.26	$	5.29	$	5.05	$	5.26
Diluted	$	5.20	$	5.23	$	4.98	$	5.19