Fixed Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Depreciation expense			$ 58,710	$ 51,944
Impairment charges	$ 400	$ 400	1,300	400
Leasehold Improvements and Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Asset retirement obligations	10,000		10,000
Occupancy and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	4,800	4,900	15,200	14,800
Software development costs capitalized	14,500	13,600	30,000	34,100
Amortization of software development costs	$ 7,200	$ 7,000	$ 20,400	$ 17,500