Annual report pursuant to Section 13 and 15(d)

Intangible Assets, net - Amortization Expense (Details)

v3.8.0.1
Intangible Assets, net - Amortization Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]                      
2018 $ 38,443               $ 38,443    
2019 28,647               28,647    
2020 22,263               22,263    
2021 13,824               13,824    
2022 7,907               7,907    
Thereafter 11,498               11,498    
Net Carrying Amount 122,582       $ 166,720       122,582 $ 166,720  
Amortization of intangible assets $ 11,106 $ 10,981 $ 10,860 $ 11,008 $ 11,593 $ 9,166 $ 7,486 $ 7,403 $ 43,955 $ 35,648 $ 26,994
Content library                      
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]                      
Amortization expense, cost of goods sold                     $ 200