Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 525,142	$ 525,780
Net of accumulated impairment losses	797,600
Lease agreements
Finite-Lived Intangible Assets [Line Items]
Definite life intangibles	4,500	$ 4,700
Franchise assets
Finite-Lived Intangible Assets [Line Items]
Franchise assets	$ 69,900