Fixed Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Depreciation expense			$ 38,534,000	$ 33,949,000
Impairment charges	$ 600,000	$ 0	900,000	0
Leasehold Improvements and Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Asset retirement obligations	10,100,000		10,100,000
Occupancy and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	5,300,000	5,400,000	10,300,000	9,900,000
Software development costs capitalized	11,400,000	8,100,000	18,400,000	18,900,000
Amortization of software development costs	$ 6,900,000	$ 4,600,000	$ 13,200,000	$ 10,500,000