XML 79 R60.htm IDEA: XBRL DOCUMENT v3.8.0.1
Equity Investments - Additional Information (Detail)
$ in Thousands, € in Millions
3 Months Ended 12 Months Ended
Oct. 01, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Sheet
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
EUR (€)
Dec. 31, 2016
EUR (€)
Schedule of Equity Method Investments [Line Items]              
Equity method investment     $ 750,100 $ 663,400      
Distributions from affiliates     49,295 40,602 $ 15,132    
Amortization expense due to fair value step-up     91,228 73,862 74,260    
NuMit LLC [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investment     $ 321,400 325,100      
Equity method investment, ownership percentage     50.00%     50.00%  
Period used for lag basis, in months     1 month        
Distributions from affiliates     $ 48,300 38,600 13,100    
Steel Technologies LLC [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage     100.00%     100.00%  
Number of sheet processing facilities operated by Steel Technologies | Sheet     26        
Duferdofin Nucor S.r.l. [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investment     $ 285,900 256,600      
Equity method investment, ownership percentage     50.00%     50.00%  
Period used for lag basis, in months     1 month        
Equity method investments, share of net assets     $ 117,200        
Basis difference due to the step-up to fair value of certain assets and liabilities     168,700        
Step-up to fair value of equity method investment, portion related to identification of goodwill     92,300        
Amortization expense due to fair value step-up     8,900 8,800 $ 8,800    
Due from related parties, noncurrent     $ 41,900 36,900   € 35.0 € 35.0
Notes receivable, related parties, interest rate     0.83%        
Interest rate per year in excess of Euribor as of date of the notes     1.00%        
Equity method investments notes payable with parent company, maturity date     Jan. 31, 2019        
Impairment charge against investment   $ 153,000          
Hunter Ridge Energy Services LLC [Member]              
Schedule of Equity Method Investments [Line Items]              
Period used for lag basis, in months     1 month        
Equity method investment sold, carrying amount     $ 133,300        
Equity Method Investment Sales Price $ 135,000            
Equity method investment ownership percentage, percentage of investee's ownership interest sold 50.00%            
Facility A [Member] | Duferdofin Nucor S.r.l. [Member]              
Schedule of Equity Method Investments [Line Items]              
Equity method investments credit facilities, amount     146,700     122.5  
Total amount outstanding under equity method investments credit facilities     $ 146,700 $ 112,700   € 122.5 € 107.0
Guarantor obligation percentage of exposure in case of default     50.00%     50.00%  
Line of credit facility, maturity period     Oct. 12, 2018