SUPPLEMENTAL CASH FLOW & OTHER DATA (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow and Other Data

Supplemental cash flow data for the years ended December 31, 2012, 2011 and 2010 is as follows:

	2012		2011			2010
Depreciation expense	$	206,299	$	214,070		$	214,743
Amortization expense	80,297		67,032			39,221
Interest paid	163,121		161,820			139,802
Income taxes paid	305,428		285,269			421,864
Assets acquired under capital leases	5,580		8,369			18,818
Businesses acquired:
Fair value of assets acquired	50,800		1,560,173			—
Fair value of liabilities assumed	269		148,192			—
Fair value of net assets acquired	50,531		1,411,981			—
Merger consideration paid (payable)	43		(1,045		)	—
Cash paid for business acquisitions	50,574		1,410,936			—
Less: Cash acquired	—		112,312			—
Business acquisitions, net of cash acquired	$	50,574	$	1,298,624		$	—

Schedule of Supplemental Disclosures, Continuing Operations

Supplemental continuing operations data for the statement of operations for the years ended December 31, 2012, 2011 and 2010 is as follows:

	2012			2011			2010
Depreciation expense	$	203,542		$	211,052		$	213,190
Interest expense	(167,688		)	(172,215		)	(145,029		)
Interest income	2,999			2,601			1,562
Interest expense, net	$	(164,689	)	$	(169,614	)	$	(143,467	)