CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Paid-In Capital	Retained Earnings
Beginning Balance at Oct. 31, 2017	$ 1,432,862	$ 22,803	$ 134,999	$ 1,275,060
Beginning Balance (in shares) at Oct. 31, 2017		22,802,690
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	51,206			51,206
Cash dividends ($0.32 per share)	(7,305)			(7,305)
Issuance of stock under stock compensation plans	(4,162)	$ 26	(4,188)
Issuance of stock under stock compensation plans (in shares)		26,208
Amortization of unearned compensation	5,730		5,730
Ending Balance at Jan. 31, 2018	1,478,331	$ 22,829	136,541	1,318,961
Ending Balance (in shares) at Jan. 31, 2018		22,828,898
Beginning Balance at Oct. 31, 2018	1,387,893	$ 22,100	81,269	1,284,524
Beginning Balance (in shares) at Oct. 31, 2018		22,099,780
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(17,833)			(17,833)
Cash dividends ($0.32 per share)	(7,089)			(7,089)
Issuance of stock under stock compensation plans	(2,073)	$ 53	(2,126)
Issuance of stock under stock compensation plans (in shares)		53,688
Amortization of unearned compensation	2,313		2,313
Ending Balance at Jan. 31, 2019	$ 1,363,211	$ 22,153	$ 81,456	$ 1,259,602
Ending Balance (in shares) at Jan. 31, 2019		22,153,468