Description of Business and Summary of Significant Accounting Policies - Amortization Expense for Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	$ 46,807
2018	40,797
2019	36,561
2020	33,685
2021	30,923
thereafter	201,328
Net	390,101	$ 2,895
Contra Revenue [Member]
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	21,045
2018	21,044
2019	21,045
2020	21,044
2021	21,045
thereafter	164,849
Net	270,072
Rent Expense [Member]
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	1,695
2018	1,695
2019	1,695
2020	1,695
2021	1,695
thereafter	7,345
Net	15,820
Amortization [Member]
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	24,067
2018	18,058
2019	13,821
2020	10,946
2021	8,183
thereafter	29,134
Net	$ 104,209