SUPPLEMENTAL CASH FLOW & OTHER DATA (Tables)

3 Months Ended

Mar. 31, 2012

Supplemental Cash Flow & Other Data [Abstract]

Supplemental Cash Flow and Other Data

	Three Months Ended March 31,
	2012			2011
Depreciation expense	$	51,943		$	53,516
Interest expense	(42,987		)	(38,280		)
Interest income	654			351
Interest expense, net	(42,333		)	(37,929		)
Interest paid	49,782			55,044
Income taxes paid	10,253			10,602
Assets acquired under capital leases	1,192			821
Businesses acquired:
Fair value of assets acquired	50,800			—
Fair value of liabilities assumed	269			—
Fair value of net assets acquired	50,531			—
Merger consideration paid	25			—
Cash paid for business acquisitions	50,556			—
Less: Cash acquired	—			—
Business acquisitions, net of cash acquired	$	50,556		$	—