EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 53,362	$ 40,636	$ (17,833)	$ 11,475	$ 41,948	$ 51,206	$ 76,165	$ 104,629
Distributed and undistributed (earnings) to unvested restricted stock	(766)			(163)			(1,125)	(1,493)
Distributed and undistributed earnings to common shareholders—Basic	$ 52,596			$ 11,312			$ 75,040	$ 103,136
Weighted average shares outstanding—Basic (in shares)	21,835			22,513			21,826	22,508
Weighted average shares outstanding—Diluted (in shares)	21,835			22,513			21,826	22,508
Earnings per common share-Basic (in usd per share)	$ 2.41			$ 0.50			$ 3.44	$ 4.58
Earnings per common share-Diluted (in usd per share)	$ 2.41			$ 0.50			$ 3.44	$ 4.58