EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Apr. 30, 2019	Jan. 31, 2019	Apr. 30, 2018	Jan. 31, 2018	Apr. 30, 2019	Apr. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 40,636	$ (17,833)	$ 41,948	$ 51,206	$ 22,803	$ 93,154
Distributed and undistributed (earnings) to unvested restricted stock	(597)		(598)		(340)	(1,329)
Distributed and undistributed earnings to common shareholders—Basic	$ 40,039		$ 41,350		$ 22,463	$ 91,825
Weighted average shares outstanding—Basic (in shares)	21,830		22,511		21,822	22,506
Weighted average shares outstanding—Diluted (in shares)	21,830		22,511		21,822	22,506
Earnings per common share-Basic (in usd per share)	$ 1.83		$ 1.84		$ 1.03	$ 4.08
Earnings per common share-Diluted (in usd per share)	$ 1.83		$ 1.84		$ 1.03	$ 4.08