Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Definite Life Intangible Assets (Details)

v3.10.0.1
Intangible Assets - Definite Life Intangible Assets (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 5,738,000 $ 7,966,000 $ 17,462,000 $ 31,592,000
Retired        
Definite life intangible assets:        
Intangible assets $ 390,043,000 $ 0 $ 390,043,000 $ 0