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Reportable Segment Information (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
segment
Jun. 30, 2014
USD ($)
Segment Reporting Information [Line Items]        
Number of operating segments | segment     4  
Reportable Segment Information (Textual) [Abstract]        
Net external sales $ 3,132,139 $ 3,042,995 $ 5,582,423 $ 5,409,551
Segment profit 608,927 528,870 889,309 782,687
Foreign Countries [Member]        
Reportable Segment Information (Textual) [Abstract]        
Net external sales 476,800 576,700 933,300 1,106,000
Segment profit 22,400 39,900 40,700 72,600
Long-lived assets $ 521,000 $ 614,600 $ 521,000 $ 614,600