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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 5,863,000 $ 12,098,000 $ 11,725,000 $ 23,626,000
Retired        
Definite life intangible assets:        
Intangible assets $ 390,043,000 $ 0 $ 390,043,000 $ 0