Additional Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Additional Cash Flow Information [Abstract]

Changes in operating assets and liabilities

Changes in operating assets and liabilities, net of effects of businesses acquired consists of the following:

	Years ended December 31,
	2011			2010			2009
Accounts receivable	$	61,918		$	(89,261	)	$	29,055
Inventories		(13,829	)		(54,358	)		79,415
Prepaid expenses and other current assets		(14,273	)		(22,637	)		43,549
Accounts payable		(11,468	)		59,568			12,838
Other current liabilities		(74,851	)		108,418			(56,107	)
Net change in operating assets and liabilities	$	(52,503	)	$	1,730		$	108,750