Intangible Assets and Goodwill Schedule of Future Amortization for Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Future Amortization Expense [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 24,990
Finite-Lived Intangible Assets, Amortization Expense, Year Two	24,969
Finite-Lived Intangible Assets, Amortization Expense, Year Three	24,951
Finite-Lived Intangible Assets, Amortization Expense, Year Four	24,934
Finite-Lived Intangible Assets, Amortization Expense, Year Five	24,843
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	91,136
Finite-Lived Intangible Assets, Net	$ 215,823	$ 228,542