Income Taxes Presentation of Net Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jul. 31, 2018
Presentation of Net Deferred Tax Liabilities and Assets [Abstract]
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	$ 7,286	$ 9,773
Deferred Tax Liabilities, Net, Noncurrent	168,759	133,918
Deferred Tax Liabilities, Net	$ 161,473	$ 124,145