Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Shares	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Common Shares in Treasury, at cost
Balance at Oct. 31, 2019	$ 1,581,045	$ (1,055)	$ 12,253	$ 483,116	$ 2,747,650	$ (1,055)	$ (231,881)	$ (1,430,093)
Shares issued under company stock and employee benefit plans	16,379			12,330				4,049
Stock-based compensation	6,105			6,105
Purchase of treasury shares	(4,311)							(4,311)
Dividends declared	(21,915)				(21,915)
Net income	52,004				52,004
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	2,793						2,793
Defined benefit pension and post-retirement    plans adjustment	3,229						3,229
Balance at Jan. 31, 2020	1,634,274	956	12,253	501,551	2,776,684	956	(225,859)	(1,430,355)
Balance at Oct. 31, 2019	1,581,045	(1,055)	12,253	483,116	2,747,650	(1,055)	(231,881)	(1,430,093)
Net income	231,064
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	10,509
Balance at Jul. 31, 2020	1,769,912		12,253	526,923	2,912,848		(211,624)	(1,470,488)
Balance at Jan. 31, 2020	1,634,274	956	12,253	501,551	2,776,684	956	(225,859)	(1,430,355)
Shares issued under company stock and employee benefit plans	2,168			2,362				(194)
Stock-based compensation	(72)			(72)
Purchase of treasury shares	(37,619)							(37,619)
Dividends declared	(21,963)				(21,963)
Net income	92,079				92,079
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(21,227)						(21,227)
Defined benefit pension and post-retirement    plans adjustment	3,898						3,898
Balance at Apr. 30, 2020	1,652,494	(30)	12,253	503,841	2,847,756	(30)	(243,188)	(1,468,168)
Shares issued under company stock and employee benefit plans	27,757			20,110				7,647
Stock-based compensation	2,972			2,972
Purchase of treasury shares	(9,967)							(9,967)
Dividends declared	(21,859)				(21,859)
Net income	86,981				86,981
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	28,943						28,943
Defined benefit pension and post-retirement    plans adjustment	2,621						2,621
Balance at Jul. 31, 2020	1,769,912		12,253	526,923	2,912,848		(211,624)	(1,470,488)
Balance at Oct. 31, 2020	1,758,991	(396)	12,253	534,684	2,908,738	(396)	(226,118)	(1,470,566)
Shares issued under company stock and employee benefit plans	7,438			6,462				976
Stock-based compensation	10,120			10,120
Purchase of treasury shares	(5,310)							(5,310)
Dividends declared	(22,672)				(22,672)
Net income	77,582				77,582
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	28,433						28,433
Defined benefit pension and post-retirement    plans adjustment	2,997						2,997
Balance at Jan. 31, 2021	1,857,183		12,253	551,266	2,963,252		(194,688)	(1,474,900)
Balance at Oct. 31, 2020	1,758,991	$ (396)	12,253	534,684	2,908,738	$ (396)	(226,118)	(1,470,566)
Net income	343,908
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	18,142
Balance at Jul. 31, 2021	2,063,178		12,253	573,669	3,184,229		(192,795)	(1,514,178)
Balance at Jan. 31, 2021	1,857,183		12,253	551,266	2,963,252		(194,688)	(1,474,900)
Shares issued under company stock and employee benefit plans	11,345			9,468				1,877
Stock-based compensation	3,877			3,877
Purchase of treasury shares	(24,964)							(24,964)
Dividends declared	(22,670)				(22,670)
Net income	124,144				124,144
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(6,943)						(6,943)
Defined benefit pension and post-retirement    plans adjustment	8,385						8,385
Balance at Apr. 30, 2021	1,950,357		12,253	564,611	3,064,726		(193,246)	(1,497,987)
Shares issued under company stock and employee benefit plans	5,353			4,978				375
Stock-based compensation	4,080			4,080
Purchase of treasury shares	(16,566)							(16,566)
Dividends declared	(22,679)				(22,679)
Net income	142,182				142,182
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(3,348)						(3,348)
Defined benefit pension and post-retirement    plans adjustment	3,799						3,799
Balance at Jul. 31, 2021	$ 2,063,178		$ 12,253	$ 573,669	$ 3,184,229		$ (192,795)	$ (1,514,178)