Consolidated Statements of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
BALANCE, SHARES at Feb. 28, 2021		163,172,000
BALANCE at Feb. 28, 2021	$ 4,364,613	$ 81,586	$ 1,513,821	$ 2,887,897	$ (118,691)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	436,756			436,756
Other Comprehensive Income (Loss), Net of Tax	2,937				2,937
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	20,102		20,102
Stock Repurchased and Retired During Period, Shares		(998,000)
Stock Repurchased and Retired During Period, Value	(124,542)	$ (499)	(9,348)	(114,695)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		375,000
Stock Issued During Period, Value, Stock Options Exercised	21,590	$ 187	21,403
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		254,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(17,975)	$ 127	(18,102)
BALANCE, SHARES at May. 31, 2021		162,803,000
BALANCE at May. 31, 2021	4,703,481	$ 81,401	1,527,876	3,209,958	(115,754)
BALANCE, SHARES at Feb. 28, 2021		163,172,000
BALANCE at Feb. 28, 2021	4,364,613	$ 81,586	1,513,821	2,887,897	(118,691)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	722,023
Other Comprehensive Income (Loss), Net of Tax	6,348
BALANCE, SHARES at Aug. 31, 2021		162,470,000
BALANCE at Aug. 31, 2021	4,915,179	$ 81,235	1,653,066	3,293,221	(112,343)
BALANCE, SHARES at May. 31, 2021		162,803,000
BALANCE at May. 31, 2021	4,703,481	$ 81,401	1,527,876	3,209,958	(115,754)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	285,267			285,267
Other Comprehensive Income (Loss), Net of Tax	3,411				3,411
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	14,116		14,116
Adjustments to Additional Paid in Capital, Other			90,183
Stock Issued During Period, Value, Acquisitions	90,571	$ 388
Stock Issued During Period, Shares, Acquisitions		776,000
Stock Repurchased and Retired During Period, Shares		(1,754,000)
Stock Repurchased and Retired During Period, Value	(220,045)	$ (877)	(17,164)	(202,004)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		621,000
Stock Issued During Period, Value, Stock Options Exercised	38,496	$ 311	38,185
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		24,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(118)	$ 12	(130)
BALANCE, SHARES at Aug. 31, 2021		162,470,000
BALANCE at Aug. 31, 2021	$ 4,915,179	$ 81,235	1,653,066	3,293,221	(112,343)
BALANCE, SHARES at Feb. 28, 2022	161,053,983	161,054,000
BALANCE at Feb. 28, 2022	$ 5,235,439	$ 80,527	1,677,268	3,524,066	(46,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	252,265			252,265
Other Comprehensive Income (Loss), Net of Tax	52,314				52,314
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	21,594		21,594
Stock Repurchased and Retired During Period, Shares		(1,644,000)
Stock Repurchased and Retired During Period, Value	(157,594)	$ (822)	(17,207)	(139,565)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		49,000
Stock Issued During Period, Value, Stock Options Exercised	3,442	$ 24	3,418
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		155,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(6,823)	$ 78	(6,901)
BALANCE, SHARES at May. 31, 2022		159,614,000
BALANCE at May. 31, 2022	$ 5,400,637	$ 79,807	1,678,172	3,636,766	5,892
BALANCE, SHARES at Feb. 28, 2022	161,053,983	161,054,000
BALANCE at Feb. 28, 2022	$ 5,235,439	$ 80,527	1,677,268	3,524,066	(46,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	378,170
Other Comprehensive Income (Loss), Net of Tax	$ 78,421
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(204,000)
BALANCE, SHARES at Aug. 31, 2022	158,043,981	158,044,000
BALANCE at Aug. 31, 2022	$ 5,414,227	$ 79,022	1,684,408	3,618,798	31,999
BALANCE, SHARES at May. 31, 2022		159,614,000
BALANCE at May. 31, 2022	5,400,637	$ 79,807	1,678,172	3,636,766	5,892
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	125,905			125,905
Other Comprehensive Income (Loss), Net of Tax	26,107				26,107
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	15,062		15,062
Stock Repurchased and Retired During Period, Shares		(1,730,000)
Stock Repurchased and Retired During Period, Value	(163,017)	$ (865)	(18,279)	(143,873)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		155,000
Stock Issued During Period, Value, Stock Options Exercised	9,840	$ 78	9,762
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		5,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ (307)	$ 2	(309)
BALANCE, SHARES at Aug. 31, 2022	158,043,981	158,044,000
BALANCE at Aug. 31, 2022	$ 5,414,227	$ 79,022	$ 1,684,408	$ 3,618,798	$ 31,999