Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Taxes

Schedule of components of provision (benefit) for income taxes

Years ended December 31,	2013			2012			2011
(in thousands)
Current provision:
Federal	$	104,890		$	147,580		$	91,415
State		15,627			14,673			12,938
Foreign		1,918			1,109			1,007
Deferred (benefit) provision:
Federal		(12,025	)		5,027			70,599
State		(1,035	)		(206	)		6,475
Total income tax provision	$	109,375		$	168,183		$	182,434

Schedule of reconciliation between the federal statutory rate and effective tax rate

Years ended December 31,	2013			2012			2011
Federal statutory rate		35.0	%		35.0	%		35.0	%
State income taxes, net of federal benefit		3.8			3.2			3.1
Tax credits		(0.3	)		(0.3	)		(0.2	)
Non-deductible expenses		0.5			0.5			0.4
Other		0.6			(0.4	)		(0.2	)
Effective tax rate		39.6	%		38.0	%		38.1	%

Schedule of deferred tax assets and liabilities

December 31,	2013			2012
(in thousands)
Deferred tax assets:
Self-insurance	$	7,247		$	7,417
Pension		8,018			9,688
State net operating loss carryforwards		484			1,165
Bad debts		4,748			3,489
Accrued payroll		2,019			2,038
Stock-based compensation		5,183			4,567
Tangible property regulations 481(a)		7,665			-
All others		1,541			274
Valuation allowance		(83	)		(1,003	)
Gross deferred tax assets		36,822			27,635
Deferred tax liabilities:
Depreciation		(165,960	)		(168,717	)
Goodwill amortization		(7,094	)		(6,394	)
All Others		(2,759	)		(1,754	)
Gross deferred tax liabilities		(175,813	)		(176,865	)
Net deferred tax liabilities	$	(138,991	)	$	(149,230	)

Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits

	2013		2012
Balance at January 1	$	38,000	$	35,000
Additions based on tax positions related to the current year		3,430,000		-
Additions for tax positions of prior years		12,877,000		3,000
Balance at December 31	$	16,345,000	$	38,000