SUPPLEMENTAL CASH FLOW AND OTHER DATA

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow & Other Data [Abstract]

Supplemental cash flow and other data

11.SUPPLEMENTAL CASH FLOW & OTHER DATA

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2011	2010	2011	2010
Depreciation expense	$     53,945	$      54,222	$    161,588	$   161,900
Interest expense	(44,059)	(36,472)	(129,570)	(109,642)
Interest income	651	272	1,652	1,120
Interest expense, net	(43,408)	(36,200)	(127,918)	(108,522)
Interest paid	55,718	62,131	128,301	118,546
Income taxes paid	24,934	127,298	132,655	324,416
Assets acquired under capital leases	2,927	12,018	5,624	16,230
Businesses acquired:
Fair value of assets acquired	4,729	-	1,560,173	-
Fair value of liabilities assumed	-	-	148,192	-
Fair value of net assets acquired	4,729	-	1,411,981	-
Merger consideration paid (payable)...	157,409	-	(1,151)	-
Cash paid for business acquisitions	162,138	-	1,410,830	-
Less: Cash acquired	-	-	112,312	-
Business acquisitions, net of cash      acquired	$    162,138	$                -	$ 1,298,518	$                -