Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Additional Information (Details)

v3.8.0.1
COMMITMENTS AND CONTINGENCIES - Additional Information (Details)
customer in Thousands
 1 Months Ended 3 Months Ended 7 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
office
Dec. 31, 2017
USD ($)
Mar. 31, 2018
USD ($)
office
Dec. 31, 2017
USD ($)
customer
Sep. 07, 2017
USD ($)
Commitments and Contingencies Disclosure [Line Items]            
Accruals related to guarantees and indemnities   $ 0 $ 0 $ 0 $ 0  
Maximum            
Commitments and Contingencies Disclosure [Line Items]            
Debt instrument, term (or less)   1 year        
Cybersecurity Incident            
Commitments and Contingencies Disclosure [Line Items]            
Number of customers impacted | customer         145,500  
Cybersecurity incident remediation, legal, and other professional costs $ 87,500,000 $ 4,100,000 76,500,000      
Insurance settlements receivable 0 10,000,000 35,000,000 10,000,000 $ 35,000,000 $ 0
Insurance recoveries       60,000,000    
Proceeds from insurance settlement $ 0 $ 35,000,000 $ 15,000,000 $ 50,000,000    
Number of state attorneys general offices company is in cooperation with | office   49   49    
Cybersecurity Incident | United States and Canada            
Commitments and Contingencies Disclosure [Line Items]            
Number of customers, credit card information accessed | customer         209  
Cybersecurity Incident | United States            
Commitments and Contingencies Disclosure [Line Items]            
Number of customers, personal information accessed | customer         182  
Number of customers, name and partial driver's license information stolen | customer         2,400  
Cybersecurity Incident | Canada            
Commitments and Contingencies Disclosure [Line Items]            
Number of customers, personal information accessed | customer         19  
Cybersecurity Incident | United Kingdom            
Commitments and Contingencies Disclosure [Line Items]            
Number of customers, personal information accessed | customer         860  
Free Credit File Monitoring And Identity Theft Protection Offering            
Commitments and Contingencies Disclosure [Line Items]            
Cybersecurity incident remediation, legal, and other professional costs       $ 50,700,000    
Free Credit File Monitoring And Identity Theft Protection Offering | Selling, General and Administrative Expenses            
Commitments and Contingencies Disclosure [Line Items]            
Cybersecurity incident remediation, legal, and other professional costs   $ 4,100,000        
Investigation, Remediation, Legal, And Other Professional Services            
Commitments and Contingencies Disclosure [Line Items]            
Cybersecurity incident remediation, legal, and other professional costs         $ 113,300,000  
Insurance coverage   125,000,000        
Insurance coverage deductible   $ 7,500,000.0