Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense

Income tax expense (benefit) includes the following components:

	Federal			State		Foreign	Total
2013
Current	$	104,224		17,715		121,621	243,560
Deferred	(19,811		)	(1,164	)	—	(20,975	)
	$	84,413		16,551		121,621	222,585
2012
Current	$	86,606		12,704		106,475	205,785
Deferred	11,864			(225	)	—	11,639
	$	98,470		12,479		106,475	217,424
2011
Current	$	100,479		20,219		135,152	255,850
Deferred	(4,335		)	270		—	(4,065	)
	$	96,144		20,489		135,152	251,785

Schedule of Effective Income Tax Rate Reconciliation

Income tax expense differs from amounts computed by applying the United States Federal income tax rate of 35% to earnings before income taxes as a result of the following:

	2013		2012	2011
Computed “expected” tax expense	$	200,408	192,638	223,310
Increase in income taxes resulting from:
State income taxes, net of Federal income tax benefit	10,758		8,111	13,318
Nondeductible stock compensation expense, net	9,927		12,061	12,877
Other, net	1,492		4,614	2,280
	$	222,585	217,424	251,785

Schedule of U.S. and Foreign Components of Income Before Income Tax Expense/(Benefit)

The components of earnings before income taxes are as follows:

	2013		2012	2011
United States	$	192,850	179,483	212,308
Foreign	379,746		370,910	425,720
	$	572,596	550,393	638,028

Components of Deferred Tax Assets and Liabilities

The tax effects of temporary differences and tax credits that give rise to significant portions of deferred tax assets and deferred tax liabilities are as follows:

Years ended December 31,	2013			2012
Deferred Tax Assets:
Accrued third party obligations, deductible for taxes upon economic performance	$	16,973		10,144
Provision for doubtful accounts receivable	756			1,111
Excess of financial statement over tax depreciation	9,852			8,122
Deductible stock compensation expense, net	11,621			9,382
Foreign currency translation adjustment	3,432			—
Partnership basis difference	—			1,426
Retained liability for cargo claims	802			983
Total gross deferred tax assets	43,436			31,168
Deferred Tax Liabilities:
Unremitted foreign earnings, net of related foreign tax credits	(83,186		)	(94,787	)
Foreign currency translation adjustment	—			(3,141	)
Other	(135		)	(135	)
Total gross deferred tax liabilities	$	(83,321	)	(98,063	)
Net deferred tax liabilities	$	(39,885	)	(66,895	)
Current deferred tax assets	$	(18,396	)	(12,102	)
Noncurrent deferred tax liabilities	$	(58,281	)	(78,997	)