Stock Repurchase Program and Cash Dividend (Details) - $ / shares shares in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Stock Repurchase Program [Abstract]
Number of shares purchased	4,427	557
Average price per share	$ 47.43	$ 27.33
Remaining authorization at January 31:	18,670	15,281