Property, Equipment and Software, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Internally developed software	$ 117,510	$ 141,233
Leasehold improvements	39,315	31,109
Computer equipment	26,669	24,204
Purchased software	11,846	10,139
Furniture and fixtures	9,406	8,468
Construction in progress	4,937	4,106
Total property, equipment and software	209,683	219,259
Accumulated depreciation and amortization	(95,313)	(105,384)
Total property, equipment and software, net	114,370	113,875
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Internally developed software	$ 21,300	$ 10,300