Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

	Years Ended December 31,
	2013			2012			2011
Current (benefit) expense:
Federal	$	(10,137	)	$	148,495		$	2,333
State and foreign	7,507			18,836			6,489
	(2,630		)	167,331			8,822
Deferred (benefit) expense:
Federal	154,299			(77,360		)	62,131
State	17,205			(11,154		)	7,029
	171,504			(88,514		)	69,160
Tax expense relating to uncertain tax positions, including accrued interest	9,967			7,241			6,266
Income tax expense	$	178,841		$	86,058		$	84,248

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

	Years Ended December 31,
	2013		2012		2011
U.S. federal statutory income tax rate	35	%	35	%	35	%
State and local income taxes, net of federal benefit	2		2		4
Changes in the valuation allowance	1		(1	)	(1	)
Domestic production activity deduction	(1	)	—		—
Tax expense relating to uncertain tax positions, including accrued interest, net of deferred tax benefits	2		2		2
Other	(1	)	1		—
Effective income tax rate	38	%	39	%	40	%

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

	December 31,
	2013			2012
Deferred Tax Asset (Liability)
Current
NOLs and tax credit carry forwards	$	5,130		$	687
Compensation and benefit plans	13,299			10,230
Allowance for doubtful accounts	316			392
Deferred litigation settlement proceeds	—			114,210
Other liabilities	1,280			1
Deferred tax asset	20,025			125,520
Valuation allowance	(2,623		)	(4,117		)
Net deferred tax asset, current	17,402			121,403
Other assets	(1,734		)	—
Deferred tax liability, current	(1,734		)	—
Net deferred tax asset, current	15,668			121,403
Noncurrent
NOLs and tax credit carry forwards	26,413			25,625
Compensation and benefit plans	18,713			13,768
Fixed assets and intangible assets	—			7,480
Interest rate swap contracts	3,577			4,971
Other liabilities	7,281			7,537
Deferred tax asset	55,984			59,381
Valuation allowance	(7,335		)	(1,947		)
Net deferred tax asset, noncurrent	48,649			57,434
Prepaid liabilities	(825		)	(668		)
Fixed assets and intangible assets	(8,595		)	—
Investments in partnerships	(131,116		)	(85,907		)
Other assets	(3,388		)	—
Deferred tax liability, noncurrent	(143,924		)	(86,575		)
Net deferred tax liability, noncurrent	(95,275		)	(29,141		)
Total net deferred tax (liability) asset	$	(79,607	)	$	92,262

Schedule Of Unrecognized Tax Benefits Reconciliation [Table Text Block]

Balance at December 31, 2012	$	16,721
Increases related to prior year tax positions	6,802
Increases related to current year tax positions	4,907
Decreases due to settlements of prior year tax positions	(1,810		)
Decreases due to payments related to prior year tax positions	(287		)
Balance at December 31, 2013	$	26,333