SUPPLEMENTAL CASH FLOW & OTHER DATA (Tables)

6 Months Ended

Jun. 30, 2013

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow and Other Data

Supplemental cash flow data for the three and six months ended June 30, 2013 and 2012 is as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013			2012
Depreciation expense	$	52,037	$	51,686	$	102,895		$	103,629
Amortization expense	19,759		20,169		39,119			40,400
Interest paid	32,180		32,208		83,971			81,990
Income taxes paid	120,981		192,556		204,938			202,809
Assets acquired under capital leases	1,995		1,763		2,411			2,955
Businesses acquired:
Fair value of assets acquired	89,473		—		241,016			50,800
Fair value of liabilities assumed	154		—		10,962			269
Fair value of net assets acquired	89,319		—		230,054			50,531
Merger consideration paid (payable), net	237		12		(50,105		)	37
Cash paid for business acquisitions	89,556		12		179,949			50,568
Less: Cash acquired	—		—		—			—
Business acquisitions, net of cash acquired	$	89,556	$	12	$	179,949		$	50,568

Schedule of Cash Flow, Supplemental Disclosures, Continuing Operations

Supplemental continuing operations data for the statement of operations for the three and six months ended June 30, 2013 and 2012 is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Depreciation expense	$	52,037		$	51,019		$	102,671		$	102,255
Interest expense	(40,579		)	(42,371		)	(81,065		)	(85,132		)
Interest income	658			621			1,279			1,280
Interest expense, net	(39,921		)	(41,750		)	(79,786		)	(83,852		)