XML 61 R50.htm IDEA: XBRL DOCUMENT v3.8.0.1
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Acquired intangible assets          
Gross Carrying Amount         $ 111,900
Accumulated Amortization $ 117,451   $ 117,451   110,908
Net Carrying Amount 152,748   152,748   992
Gross Carrying Amount 270,200   270,200    
Net Carrying Amount 152,749   152,749    
Amortization expense relating to finite-lived intangible assets 6,440 $ 53 6,546 $ 159  
Exchange memberships          
Acquired intangible assets          
Indefinite-lived intangibles 6,400   6,400    
Purchased technology          
Acquired intangible assets          
Gross Carrying Amount 110,000   110,000   110,000
Accumulated Amortization 110,000   $ 110,000   $ 110,000
Purchased technology | Minimum          
Acquired intangible assets          
Useful Lives     1 year 4 months 24 days   1 year 4 months 24 days
Purchased technology | Maximum          
Acquired intangible assets          
Useful Lives     2 years 6 months   2 years 6 months
ETF issuer relationships          
Acquired intangible assets          
Gross Carrying Amount 950   $ 950   $ 950
Accumulated Amortization 533   533   454
Net Carrying Amount 417   $ 417   $ 496
Useful Lives     9 years   9 years
ETF buyer relationships          
Acquired intangible assets          
Gross Carrying Amount 950   $ 950   $ 950
Accumulated Amortization 533   533   454
Net Carrying Amount 417   $ 417   $ 496
Useful Lives     9 years   9 years
Leases          
Acquired intangible assets          
Gross Carrying Amount 1,800   $ 1,800    
Accumulated Amortization 247   247    
Net Carrying Amount 1,553   $ 1,553    
Useful Lives     3 years    
FCC licenses          
Acquired intangible assets          
Gross Carrying Amount 200   $ 200    
Accumulated Amortization 12   12    
Net Carrying Amount 188   $ 188    
Useful Lives     7 years    
Technology          
Acquired intangible assets          
Gross Carrying Amount 67,800   $ 67,800    
Accumulated Amortization 5,001   5,001    
Net Carrying Amount 62,799   $ 62,799    
Technology | Minimum          
Acquired intangible assets          
Useful Lives     1 year    
Technology | Maximum          
Acquired intangible assets          
Useful Lives     6 years    
Customer relationships          
Acquired intangible assets          
Gross Carrying Amount 77,100   $ 77,100    
Accumulated Amortization 1,027   1,027    
Net Carrying Amount 76,073   $ 76,073    
Customer relationships | Minimum          
Acquired intangible assets          
Useful Lives     13 years    
Customer relationships | Maximum          
Acquired intangible assets          
Useful Lives     17 years    
Trade names          
Acquired intangible assets          
Gross Carrying Amount 5,000   $ 5,000    
Accumulated Amortization 98   98    
Net Carrying Amount $ 4,902   $ 4,902    
Useful Lives     10 years