XML 63 R51.htm IDEA: XBRL DOCUMENT v3.10.0.1
RELATED PARTY TRANSACTIONS WITH IAC - Narrative (Details) - IAC
€ in Millions, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Sep. 30, 2018
EUR (€)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Related Party Transaction [Line Items]                
Allocated general and administrative costs from related party activities   $ 1.7   $ 4.8        
Amounts due to related party             $ 2.0  
Notes Payable | Related Party Promissory Note                
Related Party Transaction [Line Items]                
Increase (decrease) in long-term debt - related parties | €         € (2.4)      
Long-term debt - related party $ 1.0   $ 1.0     € 0.9 2.8 € 2.4
Employee Matters Agreement                
Related Party Transaction [Line Items]                
Shares received from related party pursuant to employee matters agreement (in shares) | shares 0.1   0.7          
Services Agreement                
Related Party Transaction [Line Items]                
Related party costs $ 1.7   $ 4.4          
Amounts due to related party             $ 0.4