XML 83 R72.htm IDEA: XBRL DOCUMENT v3.19.2
Financial Instruments and Fair Value Measurements - Derivatives Narrative (Details)
$ in Thousands, £ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
May 31, 2019
GBP (£)
derivative
May 31, 2019
USD ($)
derivative
Interest rate swaps        
Derivative [Line Items]        
Interest rate swap unrealized loss expected to be reclassified within next twelve months $ 5,500 $ 5,500    
Interest rate swaps | Interest expense        
Derivative [Line Items]        
Unrealized gains (losses) reclassified to income statement (454) (1,100)    
Cross-currency swaps        
Derivative [Line Items]        
Cross-currency swap unrealized gains expected to be reclassified within next twelve months 1,600 1,600    
Cross-currency swaps | Cash flow hedge        
Derivative [Line Items]        
Number of derivative instruments | derivative     4 4
Swap exchange notional amount     £ 130 $ 166,000
Cross-currency swaps | Foreign exchange gains        
Derivative [Line Items]        
Unrealized gains (losses) reclassified to income statement $ 1,400 $ 1,400