Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Years Ended December 31,
	2012			2011		2010
Current expense:
Federal	$	148,495		$	2,333	$	—
State and foreign	18,836			6,489		4,360
	167,331			8,822		4,360
Deferred (benefit) expense:
Federal	(77,360		)	62,131		62,078
State	(11,154		)	7,029		18,666
	(88,514		)	69,160		80,744
Tax expense relating to uncertain tax positions, including accrued interest	7,241			6,266		2,969
Income tax expense	$	86,058		$	84,248	$	88,073

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Years Ended December 31,
	2012		2011		2010
U.S. federal statutory income tax rate	35	%	35	%	35	%
State and local income taxes, net of federal benefit	2		4		5
Changes in the valuation allowance	(1	)	(1	)	1
Change in the state rate used to measure deferred taxes, net of federal benefit	—		—		1
Tax expense relating to uncertain tax positions, including accrued interest, net of deferred tax benefits	2		2		1
Other	1		—		—
Effective income tax rate	39	%	40	%	43	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2012			2011
Deferred Tax Asset (Liability)
Current
NOLs and tax credit carry forwards	$	687		$	55,322
Compensation and benefit plans	10,230			7,323
Allowance for doubtful accounts	392			1,029
Deferred litigation settlement proceeds	114,210			—
Other liabilities	1			127
Deferred tax asset	125,520			63,801
Valuation allowance	(4,117		)	(4,529		)
Net deferred tax asset, current	121,403			59,272
Noncurrent
NOLs and tax credit carry forwards	25,625			22,737
Compensation and benefit plans	13,768			10,944
Fixed assets and intangible assets	7,480			14,771
Interest rate swap contracts	4,971			7,064
Other liabilities	7,537			4,377
Deferred tax asset	59,381			59,893
Valuation allowance	(1,947		)	(4,252		)
Net deferred tax asset, noncurrent	57,434			55,641
Prepaid liabilities	(668		)	—
Investments in partnerships	(85,907		)	(107,546		)
Deferred tax liability, noncurrent	(86,575		)	(107,546		)
Net deferred tax liability, noncurrent	(29,141		)	(51,905		)
Total net deferred tax asset	$	92,262		$	7,367

Schedule Of Unrecognized Tax Benefits Reconciliation [Table Text Block]

Balance at December 31, 2011	$	10,465
Increases related to prior year tax positions	43
Increases related to current year tax positions	6,213
Balance at December 31, 2012	$	16,721