EARNINGS PER SHARE (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Earnings Per Share [Abstract]
Net income	$ 50,881	$ 76,080	$ 188,630	$ 155,939
Distributed and undistributed (earnings) to unvested restricted stock	(829)	(2,056)	(3,882)	(4,267)
Distributed and undistributed earnings to common shareholders—Basic	$ 50,052	$ 74,024	$ 184,748	$ 151,672
Weighted average shares outstanding—Basic	22,047	22,448	22,307	22,437
Weighted average shares outstanding—Diluted	22,047	22,448	22,307	22,437
Earnings per common share-Basic (in usd per share)	$ 2.27	$ 3.30	$ 8.28	$ 6.76
Earnings per common share-Diluted (in usd per share)	$ 2.27	$ 3.30	$ 8.28	$ 6.76