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Fixed Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense			$ 65,683	$ 61,201
Impairment charges	$ 700	$ 500	700	1,200
Leasehold Improvements and Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Asset retirement obligations	7,500		7,500
Occupancy and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	7,800	7,500	23,000	22,900
Software development costs capitalized	14,400	13,500	38,500	27,800
Amortization of software development costs	$ 7,500	$ 4,700	$ 19,000	$ 15,300

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Additions made to capitalized computer software costs during the period.

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Amount of expense for amortization of capitalized computer software costs.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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