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INCOME TAXES (Tables)
 12 Months Ended
Dec. 31, 2016
Income Taxes [Abstract]  
Deferred income tax (assets) liabilities
Deferred income tax (assets) liabilities relate to:

  
2016
  
2015
  
2014
 
Property, plant and equipment
 
$
6,515,129
  
$
6,694,885
  
$
6,503,597
 
Other
  
119,618
   
99,989
   
92,531
 
Total deferred income tax liabilities
  
6,634,747
   
6,794,874
   
6,596,128
 
             
Other postretirement benefits
  
(371,460
)
  
(281,154
)
  
(1,030,203
)
Inventories
  
(806,680
)
  
(807,061
)
  
(829,876
)
Allowance for doubtful accounts
  
(124,329
)
  
(124,351
)
  
(105,296
)
Intangible assets
  
(224,609
)
  
(299,137
)
  
(396,541
)
Accrued compensation
  
(233,806
)
  
(252,297
)
  
(203,180
)
Pensions
  
(9,406,224
)
  
(8,616,582
)
  
(9,275,949
)
Total deferred income tax assets
  
(11,167,108
)
  
(10,380,582
)
  
(11,841,045
)
Net deferred income tax (assets)  liabilities
 
$
(4,532,361
)
 
$
(3,585,708
)
 
$
(5,244,917
)
             
Income before income taxes
Income before income taxes consists of:

  
2016
  
2015
  
2014
 
Domestic
 
$
7,276,239
  
$
4,308,809
  
$
8,087,552
 
Foreign
  
3,947,176
   
3,712,166
   
3,441,211
 
   
$
11,223,415
  
$
8,020,975
  
$
11,528,763
 
Provision for income taxes
The provision for income taxes follows:

  
2016
  
2015
  
2014
 
Current:
         
   Federal
 
$
2,554,341
  
$
1,337,417
  
$
2,339,917
 
   Foreign
  
1,091,952
   
1,054,694
   
991,257
 
   State
  
194,514
   
140,139
   
295,554
 
Deferred:
            
   Federal
  
(339,412
)
  
(223,530
)
  
164,830
 
   State
  
(63,303
)
  
(14,788
)
  
75,729
 
   
$
3,438,092
  
$
2,293,932
  
$
3,867,287
 
Reconciliation of income taxes computed using the U.S. federal statutory rate to that reflected in operations
A reconciliation of income taxes computed using the U.S. federal statutory rate to that reflected in operations follows:

  
2016
  
2015
  
2014
 
   
Amount
  
Percent
  
Amount
  
Percent
  
Amount
  
Percent
 
Income taxes using U.S. federal statutory rate
 
$
3,815,962
   
34
%
 
$
2,727,131
   
34
%
 
$
3,919,779
   
34
%
State income taxes, net of federal benefit
  
87,061
   
1
   
82,987
   
1
   
249,324
   
2
 
Impact of foreign subsidiaries on effective tax rate
  
(365,528
)
  
(3
)
  
(388,132
)
  
(5
)
  
(76,914
)
  
(1
)
Impact of manufacturers deduction on effective tax rate
  
(140,690
)
  
(1
)
  
(91,018
)
  
(1
)
  
(185,993
)
  
(1
)
Other—net
  
41,287
   
-
   
(37,036
)
  
-
   
(38,909
)
  
-
 
   
$
3,438,092
   
31
%
 
$
2,293,932
   
29
%
 
$
3,867,287
   
34
%
Reconciliation of unrecognized tax benefits
A reconciliation of the beginning and ending amount of unrecognized tax benefits are as follows:

  
2016
  
2015
  
2014
 
          
Balance at beginning of year
 
$
249,782
  
$
248,645
  
$
220,289
 
Increases for positions taken during the current period
  
44,172
   
27,947
   
50,735
 
Decreases relating to settlements
  
—
   
—
   
—
 
Decreases resulting from the expiration of the statute of limitations
  
(42,115
)
  
(26,810
)
  
(22,379
)
Balance at end of year
 
$
251,839
  
$
249,782
  
$
248,645