Condensed Consolidated Statements of Shareholders' Equity (UNAUDITED) - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Shares in Treasury, At Cost [Member]
Balance at Oct. 31, 2018	$ 1,450,741	$ 12,253	$ 446,555	$ 2,488,375	$ (179,314)	$ (1,317,128)
Shares issued under company stock and employee benefit plans	3,607		1,016			2,591
Stock-based compensation	4,359		4,359
Purchase of treasury shares, value	(107,667)					(107,667)
Dividends declared	(20,210)			(20,210)
Net income	48,567			48,567
Impact of adoption of ASU | ASU 2014-09 [Member]	4,329			4,329
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	16,463				16,463
Defined benefit pension and post-retirement plans adjustment	1,352				1,352
Balance at Jan. 31, 2019	1,401,541	12,253	451,930	2,521,061	(161,499)	(1,422,204)
Balance at Oct. 31, 2018	1,450,741	12,253	446,555	2,488,375	(179,314)	(1,317,128)
Net income	234,418
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	227
Balance at Jul. 31, 2019	1,546,888	12,253	470,951	2,666,797	(173,759)	(1,429,354)
Balance at Jan. 31, 2019	1,401,541	12,253	451,930	2,521,061	(161,499)	(1,422,204)
Shares issued under company stock and employee benefit plans	10,847		8,116			2,731
Stock-based compensation	4,869		4,869
Purchase of treasury shares, value	(10,422)					(10,422)
Dividends declared	(20,029)			(20,029)
Net income	91,923			91,923
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(9,064)				(9,064)
Defined benefit pension and post-retirement plans adjustment	1,598				1,598
Balance at Apr. 30, 2019	1,471,263	12,253	464,915	2,592,955	(168,965)	(1,429,895)
Shares issued under company stock and employee benefit plans	2,821		2,245			576
Stock-based compensation	3,791		3,791
Purchase of treasury shares, value	(35)					(35)
Dividends declared	(20,086)			(20,086)
Net income	93,928			93,928
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(7,172)				(7,172)
Defined benefit pension and post-retirement plans adjustment	2,378				2,378
Balance at Jul. 31, 2019	1,546,888	12,253	470,951	2,666,797	(173,759)	(1,429,354)
Balance at Oct. 31, 2019	1,581,045	12,253	483,116	2,747,650	(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, value	(4,311)					(4,311)
Dividends declared	(21,915)			(21,915)
Net income	52,004			52,004
Impact of adoption of ASU | ASU 2016-02 [Member]	(1,055)			(1,055)
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	12,253	501,551	2,776,684	(225,859)	(1,430,355)
Balance at Oct. 31, 2019	1,581,045	12,253	483,116	2,747,650	(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	12,253	501,551	2,776,684	(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, value	(37,619)					(37,619)
Dividends declared	(21,963)			(21,963)
Net income	92,079			92,079
Impact of adoption of ASU | ASU 2016-02 [Member]	956			956
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	12,253	503,841	2,847,756	(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, value	(9,967)					(9,967)
Dividends declared	(21,859)			(21,859)
Net income	86,981			86,981
Impact of adoption of ASU | ASU 2016-02 [Member]	(30)			(30)
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)