XML 35 R48.htm IDEA: XBRL DOCUMENT v3.19.3
Financial Instruments (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Liabilities:    
Accounts receivable, transferred to third party $ 3,000  
Proceeds from sale of receivables 3,000  
Interest rate swap derivatives    
Liabilities:    
Interest rate swap derivatives 3,500  
Recurring    
Restricted investment:    
Rabbi Trust 26,341 $ 20,892
Fixed income securities 0 1,801
Recurring | Interest rate swap derivatives    
Liabilities:    
Interest rate swap derivatives 3,515 8,638
Recurring | Quoted Prices in Active Markets (Level 1)    
Restricted investment:    
Rabbi Trust 0 0
Fixed income securities 0 0
Recurring | Quoted Prices in Active Markets (Level 1) | Interest rate swap derivatives    
Liabilities:    
Interest rate swap derivatives 0 0
Recurring | Significant Other Observable Inputs (Level 2)    
Restricted investment:    
Rabbi Trust 26,341 20,892
Fixed income securities 0 1,801
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap derivatives    
Liabilities:    
Interest rate swap derivatives 3,515 8,638
Recurring | Significant Unobservable Inputs (Level 3)    
Restricted investment:    
Rabbi Trust 0 0
Fixed income securities 0 0
Recurring | Significant Unobservable Inputs (Level 3) | Interest rate swap derivatives    
Liabilities:    
Interest rate swap derivatives $ 0 $ 0