TAXES ON INCOME TAXES ON INCOME (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Components of Income Tax Expense

The components of income tax expense for 2012, 2011 and 2010 were as follows:

	2012			2011			2010
Current:
Federal	$	332,053		$	265,865		$	349,755
State and local	60,708			60,273			93,229
Foreign	2,649			2,666			4,283
Deferred:
Federal	13,298			37,245			(6,828		)
State and local	(6,152		)	(11,073		)	(10,782		)
Foreign	(659		)	(274		)	470
Total	$	401,897		$	354,702		$	430,127

Reconciliation of the Federal Statutory Rate

A reconciliation of the federal statutory rate to the Company's effective tax rate for 2012, 2011 and 2010 was as follows:

	2012		2011		2010
Tax provision at statutory rate	35.0	%	35.0	%	35.0	%
State and local income taxes, net of federal benefit	3.4		3.7		4.0
Impact of foreign operations	(0.3	)	—		—
Tax credits	(0.2	)	(0.5	)	(0.3	)
Charge associated with settlement of certain legal claims (see Note 17), a portion for which a tax benefit has not been recorded	—		5.2		—
Transaction costs associated with business acquisitions (see Note 5), a portion for which a tax benefit has not been recorded	—		0.3		—
Non-deductible expenses, primarily meals and entertainment expenses	0.3		0.3		0.2
Impact of noncontrolling interests	(1.3	)	(1.2	)	(1.2	)
Other, net	0.7		(1.0	)	(1.1	)
Effective tax rate	37.6	%	41.8	%	36.6	%

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets (liabilities) at December 31, 2012 and 2011 were as follows:

	2012			2011
Current deferred tax assets:
Accounts receivable reserves	$	90,784		$	85,485
Liabilities not currently deductible	83,425			67,843
Total current deferred tax assets	$	174,209		$	153,328
Non-current deferred tax assets (liabilities):
Liabilities not currently deductible	$	139,869		$	151,621
Stock-based compensation	58,253			72,262
Capitalized R&D expense	10,413			16,899
Net operating loss carryforwards, net of valuation allowance	104,257			121,234
Depreciation and amortization	(484,773		)	(528,129		)
Total non-current deferred tax liabilities, net	$	(171,981	)	$	(166,113	)

Schedule of Unrecognized Benefits

The total amount of unrecognized tax benefits as of and for the years ended December 31, 2012, 2011 and 2010 consisted of the following:

	2012			2011			2010
Balance, beginning of year	$	194,861		$	151,554		$	126,454
Additions:
For tax positions of current year	12,142			63,343			20,904
For tax positions of prior years	10,614			9,196			28,140
Reductions:
Changes in judgment	(1,720		)	(13,543		)	(13,467		)
Expirations of statutes of limitations	(6,061		)	(2,952		)	(10,477		)
Settlements	(10,404		)	(12,737		)	—
Balance, end of year	$	199,432		$	194,861		$	151,554