Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.10.0.1
Segment Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting Information [Line Items]        
Total consolidated revenue 100.00% 100.00% 100.00% 100.00%
North America [Member]        
Segment Reporting Information [Line Items]        
Total consolidated revenue 56.10% 59.80% 56.90% 58.60%
U.K. [Member]        
Segment Reporting Information [Line Items]        
Total consolidated revenue 23.00% 21.60% 22.30% 22.60%
Other foreign markets [Member]        
Segment Reporting Information [Line Items]        
Total consolidated revenue 20.90% 18.60% 20.80% 18.80%