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. 29, 2020		163,081,000
BALANCE at Feb. 29, 2020	$ 3,768,875	$ 81,541	$ 1,348,988	$ 2,488,417	$ (150,071)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cummulative Effect | Accounting Standards Update 2016-13 [Member]	(153,306)			(153,306)
Net earnings	4,978			4,978
Other Comprehensive Income (Loss), Net of Tax	(15,334)				(15,334)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	17,652		17,652
Stock Repurchased and Retired During Period, Shares		(515,000)
Stock Repurchased and Retired During Period, Value	(40,709)	$ (258)	(4,271)	(36,180)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		35,000
Stock Issued During Period, Value, Stock Options Exercised	1,706	$ 18	1,688
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		154,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(5,552)	$ 77	(5,629)
BALANCE, SHARES at May. 31, 2020		162,755,000
BALANCE at May. 31, 2020	$ 3,578,310	$ 81,378	1,358,428	2,303,909	(165,405)
BALANCE, SHARES at Feb. 28, 2021	163,172,333	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	162,802,762	162,803,000
BALANCE at May. 31, 2021	$ 4,703,481	$ 81,401	$ 1,527,876	$ 3,209,958	$ (115,754)