Description of Business and Summary of Significant Accounting Policies (Details Textual)		6 Months Ended
	Aug. 01, 2018 USD ($)	Jan. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			59.50%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			40.50%
Cumulative Effect on Retained Earnings, Net of Tax	$ 23,000,000.0
Contract with Customer, Asset, Net		$ 8,472,000	$ 11,840,000
Capitalized Contract Cost, Amortization		(3,322,000)
Contract with Customer, Liability		0
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss)		$ (46,000)
Tax benefits realized upon ultimate settlement, Description		The second step is to measure the tax position as the largest amount that is more than 50% likely to be realized upon ultimate settlement.
Capitalized software costs		$ 34,300,000	30,700,000
Accumulated amortization expense		$ 19,300,000	$ 16,000,000.0
Number of operating segments		2
Number of reportable segment		2