XML 149 R134.htm IDEA: XBRL DOCUMENT v3.10.0.1
Derivatives and hedging activities - Narratives (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 14, 2018
Jul. 06, 2018
Derivative          
Gain (loss) recorded in other comprehensive income/(loss) $ 9,819 $ (22,612) $ 4,975    
Fair value of derivatives in a net asset position 1,752 918      
Assets required to settle obligations under derivatives with credit-risk-related contingent features upon breach of provisions, termination value 1,742 942      
Fair value of non-derivative hedging instruments 201,780 213,350      
Liabilities subject to compromise, early contract termination fees         $ 3,000
Liabilities subject to compromise, early contract termination fees, payment in case of sale or change in control       $ 92,261 10,000
Liabilities subject to compromise, early contract termination fees, payment in case of sale or change in control, annual decrease         1,000
Contingent consideration, liability         $ 25,000
Interest rate swaps          
Derivative          
Loss on contract termination 359        
Amount accounted for in other comprehensive income/(loss), which is expected to be reclassified to interest expense in the next 12 months 51        
Selling, General and Administrative Expenses          
Derivative          
Fair value of potential payment on change in control of company $ 13,000 $ 0 $ 0