Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Definite Life Intangible Assets (Details)

v3.10.0.1
Intangible Assets - Definite Life Intangible Assets (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Impairment of finite-lived intangible assets $ 0 $ 0 $ 0
Amortization of intangible assets 23,185,000 37,455,000 $ 48,545,000
Retired      
Definite life intangible assets:      
Intangible assets $ 390,043,000 $ 0