Recent Adopted and Issued Accounting Pronouncements - Textuals (Details) - USD ($) $ in Thousands	Feb. 01, 2019	Jul. 31, 2019
Recent Adopted and Issued Accounting Pronouncements [Abstract]
Present value of lease liabilities	$ 384,500	$ 346,929
Operating lease right-of-use assets	341,200	$ 309,421
Operating Lease, Impairment Loss	$ 9,600