Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to Cooper stockholders	$ 60,500	$ 87,900	$ 74,100	$ 51,400	$ 36,700	$ 45,000	$ 60,700	$ 61,200	$ 273,917	$ 203,523	$ 269,856
Weighted average common shares									48,520	48,452	48,061
Basic earnings per share attributable to Cooper stockholders	$ 1.25	$ 1.81	$ 1.53	$ 1.06	$ 0.76	$ 0.92	$ 1.25	$ 1.27	$ 5.65	$ 4.20	$ 5.61
Effect of dilutive stock options									500	700	900
Diluted weighted average common shares									49,026	49,179	48,960
Diluted earnings per share attributable to Cooper stockholders	$ 1.23	$ 1.79	$ 1.52	$ 1.05	$ 0.75	$ 0.91	$ 1.23	$ 1.25	$ 5.59	$ 4.14	$ 5.51