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Debt and Credit Arrangements - Foreign Facilities (Details)
12 Months Ended
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
creditfacilities
Dec. 31, 2018
CNY (¥)
creditfacilities
Dec. 31, 2018
CZK (Kč)
creditfacilities
Dec. 31, 2018
INR (₨)
creditfacilities
Dec. 31, 2018
EUR (€)
creditfacilities
Aug. 06, 2018
USD ($)
Aug. 06, 2018
CNY (¥)
Debt Instrument                
Long-term debt   $ 599,300,000            
Revolving Credit Facility | Subsidiary | VRV Asia Pacific Private Limited                
Debt Instrument                
Maximum borrowing capacity   8,600,000     ₨ 600,000,000      
Line of credit outstanding   $ 5,300,000     ₨ 368,900,000      
Fixed interest rate (percent)   8.24% 8.24% 8.24% 8.24% 8.24%    
Letter of credit outstanding   $ 2,100,000     ₨ 144,000,000      
Revolving Credit Facility | China Facilities                
Debt Instrument                
Maximum borrowing capacity   7,300,000 ¥ 50,000,000.0          
Line of credit outstanding   $ 4,900,000 ¥ 33,500,000          
Debt instrument stated interest rate (percent)   5.00% 5.00% 5.00% 5.00% 5.00%    
Revolving Credit Facility | China Facilities | CCESC                
Debt Instrument                
Bank guarantees   $ 1,900,000 ¥ 13,000,000          
Line of Credit - Working Capital | CCDEC Facility                
Debt Instrument                
Maximum borrowing capacity             $ 10,200,000 ¥ 70,000,000
Line of credit outstanding             $ 0  
Long-term Debt | CCESC Term Loan Maturing May 26, 2024                
Debt Instrument                
Debt instrument face amount   12,600,000 86,600,000.0          
Debt instrument, term 8 years              
Debt instrument periodic payments | ¥ ¥ 10,000,000              
Long-term debt   $ 1,000,000 ¥ 6,600,000          
Fixed interest rate (percent)   5.39% 5.39% 5.39% 5.39% 5.39%    
Secured Debt | Ferox                
Debt Instrument                
Maximum borrowing capacity   $ 6,000,000   Kč 135,000,000        
Secured Debt | Ferox | Maximum                
Debt Instrument                
Percentage of face amount up to maturity   0.50% 0.50% 0.50% 0.50% 0.50%    
Secured Debt | Ferox Credit Facilities                
Debt Instrument                
Number of credit facilities | creditfacilities   3 3 3 3 3    
Secured Debt | Ferox 2                
Debt Instrument                
Maximum borrowing capacity   $ 8,000,000       € 7,000,000    
Number of credit facilities | creditfacilities   2 2 2 2 2    
Secured Debt | Ferox 2 | Maximum                
Debt Instrument                
Percentage of face amount up to maturity   0.70% 0.70% 0.70% 0.70% 0.70%    
Secured Debt | Ferox Secured Facilities A and B                
Debt Instrument                
Bank guarantees   $ 7,400,000   Kč 166,300,000        
Overdraft Facility | Chart Luxembourg Facility                
Debt Instrument                
Maximum borrowing capacity   5,000,000.0            
Line of credit outstanding   $ 0