Fixed Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 19,388	$ 19,788
Impairment charges	500	1,800
Leasehold Improvements and Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Asset retirement obligations	6,300
Occupancy and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	7,700	7,200
Software development costs capitalized	4,600	2,800
Amortization of software development costs	$ 5,400	$ 7,200