EARNINGS PER SHARE (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 54,716	$ 50,881	$ 112,999	$ 188,630
Distributed and undistributed (earnings) to unvested restricted stock	(838)	(829)	(1,765)	(3,882)
Distributed and undistributed earnings to common shareholders—Basic	$ 53,878	$ 50,052	$ 111,234	$ 184,748
Weighted average shares outstanding—Basic (in shares)	22,232	22,047	22,221	22,307
Weighted average shares outstanding—Diluted (in shares)	22,232	22,047	22,221	22,307
Earnings per common share-Basic (in usd per share)	$ 2.42	$ 2.27	$ 5.01	$ 8.28
Earnings per common share-Diluted (in usd per share)	$ 2.42	$ 2.27	$ 5.01	$ 8.28