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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2016
Income Tax Disclosure [Abstract]  
Earnings Before Income Taxes
Earnings before income taxes were derived from the following sources:
 
2016
 
2015
 
2014
Domestic
$
739,383

 
785,916

 
757,896

Foreign
50,346

 
40,104

 
29,538

Earnings before income taxes
$
789,729

 
826,020

 
787,434

Components Of Income Tax Expense (Benefit)
Components of income tax expense (benefit) were as follows:
2016:
Current
 
Deferred
 
Total
Federal
$
223,837

 
23,149

 
246,986

State
28,231

 
1,236

 
29,467

Foreign
12,634

 
1,164

 
13,798

Income tax expense
$
264,702

 
25,549

 
290,251

 
2015:
Current
 
Deferred
 
Total
Federal
$
256,748

 
7,362

 
264,110

State
31,297

 
227

 
31,524

Foreign
13,677

 
348

 
14,025

Income tax expense
$
301,722

 
7,937

 
309,659

 
2014:
Current
 
Deferred
 
Total
Federal
$
250,527

 
1,919

 
252,446

State
30,768

 
256

 
31,024

Foreign
10,518

 
(704
)
 
9,814

Income tax expense
$
291,813

 
1,471

 
293,284

Difference In Income Tax Expense And Expected Expense
Income tax expense in the accompanying consolidated financial statements differed from the expected expense as follows:
 
2016
 
2015
 
2014
Federal income tax expense at the 'expected' rate of 35%
$
276,405

 
289,107

 
275,602

Increase (decrease) attributed to:
 
 
 
 
 
State income taxes, net of federal benefit
20,038

 
21,613

 
20,549

Other, net
(6,192
)
 
(1,061
)
 
(2,867
)
Total income tax expense
$
290,251

 
309,659

 
293,284

Effective income tax rate
36.8
%
 
37.5
%
 
37.2
%
Summary Of Temporary Differences That Give Rise To Deferred Income Tax Assets And Liabilities
The tax effects of temporary differences that give rise to deferred income tax assets and liabilities at year end consisted of the following: 
 
2016
 
2015
Deferred income tax assets (liabilities):
 
 
 
Inventory costing and valuation methods
$
4,788

 
4,556

Allowance for doubtful accounts
4,339

 
4,529

Insurance reserves
11,489

 
10,930

Promotions payable
1,651

 
1,738

Stock-based compensation
6,789

 
8,270

Federal and state benefit of uncertain tax positions
1,908

 
1,911

Foreign net operating loss and credit carryforwards
5,121

 
5,155

Foreign valuation allowances
(3,998
)
 
(3,406
)
Other, net
2,123

 
1,541

Total deferred income tax assets
34,210

 
35,224

Property and equipment
(114,838
)
 
(90,281
)
Total deferred income tax liabilities
(114,838
)
 
(90,281
)
Net deferred income tax liabilities
$
(80,628
)
 
(55,057
)
Reconciliation Of The Beginning And Ending Amount Of Total Gross Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of total gross unrecognized tax benefits was as follows:
 
2016
 
2015
Balance at beginning of year:
$
5,417

 
3,772

Increase related to prior year tax positions
194

 
704

Decrease related to prior year tax positions

 
(43
)
Increase related to current year tax positions
846

 
984

Decrease related to statute of limitation lapses
(1,050
)
 

Balance at end of year:
$
5,407

 
5,417