Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands		12 Months Ended
		Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties Expense		$ 2,357	$ 83	$ 218
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Tax at statutory rate		21.00%	26.90%	35.00%
State income taxes, net of federal tax benefit	[1]	0.30%	1.60%	1.00%
International rate differential		2.20%	(1.10%)	(6.30%)
Rate variances arising from foreign subsidiary distributions(1)		(0.40%)	0.80%	(5.90%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent		1.80%	14.10%	0.00%
Effective Income Tax Rate Reconciliation, Disposition of Business, Percent		0.00%	(0.80%)	0.00%
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent	[2]	(3.60%)	2.20%	3.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent		2.30%	0.50%	0.00%
Research and development tax credits and domestic manufacturer’s deduction		(1.60%)	(2.00%)	(1.80%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent		(1.70%)	(2.10%)	(1.10%)
Effective tax rate		20.30%	40.10%	24.50%

[1] The year ended July 31, 2018, includes the establishment of a valuation allowance against foreign tax credit carryforwards as a result of the Tax Reform Act.

[2] The year ended July 31, 2018, includes the divestiture of the Company's Runelandhs business based in Sweden. Refer to Note 14, "Divestiture" for additional information.