Fixed Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense			$ 40,707	$ 39,029
Impairment charges	$ 200	$ 1,400	700	3,200
Leasehold Improvements and Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Asset retirement obligations	6,500		6,500
Occupancy and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	7,400	6,900	15,200	14,100
Software development costs capitalized	9,600	7,500	14,300	10,300
Amortization of software development costs	$ 5,100	$ 7,400	$ 10,600	$ 14,600