Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Provision For Income Taxes

Provision for income taxes for the years ended December 31 consists of the following (in thousands):

	2015			2014			2013
Current:
Federal	$	363,803		$	394,904		$	281,938
State	37,811			30,997			23,701
Foreign	12,826			20,429			22,093
	414,440			446,330			327,732
Deferred:
Federal	(15,474		)	(5,743		)	51,509
State	(2,264		)	(3,155		)	(1,471		)
Foreign	1,254			1,277			2,542
	(16,484		)	(7,621		)	52,580
Total	$	397,956		$	438,709		$	380,312

Components Of Income Before Taxes

The components of income before income taxes for the years ended December 31 were as follows (in thousands):

	2015		2014		2013
Domestic	$	1,101,427	$	1,196,335	$	1,042,317
Foreign	48,736		86,985		71,988
Total	$	1,150,163	$	1,283,320	$	1,114,305

Provision For Income Tax Rate To Statutory Rate Reconciliation

The provision for income taxes differs from the amount that would be provided by applying the statutory U.S. corporate income tax rate due to the following items for the years ended December 31:

	2015		2014		2013
Provision at statutory rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal benefit	1.8		1.7		1.6
Domestic manufacturing deduction	(2.1	)	(2.1	)	(1.7	)
Research and development credit	(0.4	)	(0.4	)	(0.9	)
Unrecognized tax benefits including interest and penalties	1.1		0.2		0.9
Valuation allowance adjustments	(0.1	)	(0.1	)	(0.3	)
Tax audit settlements	—		—		0.1
Adjustments for previously accrued taxes	(0.1	)	(0.3	)	(0.2	)
Other	(0.6	)	0.2		(0.4	)
Provision for income taxes	34.6	%	34.2	%	34.1	%

Principal Components Of The Company's Deferred Tax Assets And Liabilities

The principal components of the Company’s deferred tax assets and liabilities as of December 31 include the following (in thousands):

	2015			2014
Deferred tax assets:
Accruals not yet tax deductible	$	129,449		$	120,817
Pension and postretirement benefit plan obligations	126,952			104,723
Stock compensation	20,111			21,089
Net operating loss carryforward	38,250			41,927
Valuation allowance	(20,659		)	(25,462		)
Other, net	47,039			38,465
	341,142			301,559
Deferred tax liabilities:
Depreciation, tax in excess of book	(136,340		)	(128,117		)
Other	(2,419		)	(5,691		)
	(138,759		)	(133,808		)
Total	$	202,383		$	167,751

Changes In Gross Liability For Unrecognized Tax Benefits Excluding Interest And Penalties

The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes. Changes in the Company’s gross liability for unrecognized tax benefits, excluding interest and penalties, were as follows (in thousands):

	2015			2014
Unrecognized tax benefits, beginning of period	$	64,200		$	63,057
Increase in unrecognized tax benefits for tax positions taken in a prior period	9,149			900
Decrease in unrecognized tax benefits for tax positions taken in a prior period	(1,993		)	(4,989		)
Increase in unrecognized tax benefits for tax positions taken in the current period	6,302			5,876
Statute lapses	(2,465		)	—
Settlements with taxing authorities	(2,093		)	(644		)
Unrecognized tax benefits, end of period	$	73,100		$	64,200