Property And Equipment (Detail) - USD ($) $ in Thousands		Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 253,799	$ 204,943
Less: accumulated depreciation and amortization		(158,363)	(142,855)
Property and equipment, net	[1]	95,436	62,088	$ 60,434
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	[2]	148,769	125,815
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross		59,858	44,832
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross		43,069	32,800
Automobiles
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 2,103	$ 1,496

[1] As of the end of the fiscal year.

[2] Depreciation expense for capitalized software was $11.3 million, $9.0 million and $6.0 million during fiscal 2016, 2015 and 2014, respectively. The net book value of the Company's computer software costs included in property and equipment, net was $32.3 million and $28.7 million as of April 30, 2016 and 2015, respectively.