Consolidated Statements of Changes in Shareholder's Equity - USD ($) $ in Thousands	Total	Common Shares	Preference Shares	Additional Paid-In Capital	Retained Earnings
Balance, shares (in shares) at Feb. 28, 2025		17,840
Balance at Feb. 28, 2025	$ 2,525,387	$ 0	$ 0	$ 2,378,774	$ 146,613
Preferred stock, balance, shares (in shares) at Feb. 28, 2025			400
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	49,287				49,287
Common share dividends	(30,784)				(30,784)
Balance, shares (in shares) at May. 31, 2025		17,840
Balance at May. 31, 2025	2,543,890	$ 0	$ 0	2,378,774	165,116
Preferred stock, balance, shares (in shares) at May. 31, 2025			400
Balance, shares (in shares) at Nov. 30, 2025
Balance at Nov. 30, 2025
Preferred stock, balance, shares (in shares) at Nov. 30, 2025
Balance, shares (in shares) at Feb. 28, 2026		17,840
Balance at Feb. 28, 2026	$ 2,667,651	$ 0	$ 0	2,378,774	288,877
Preferred stock, balance, shares (in shares) at Feb. 28, 2026	400		400
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 33,618				33,618
Common share dividends	$ (86,523)				(86,523)
Balance, shares (in shares) at May. 31, 2026	17,840	17,840
Balance at May. 31, 2026	$ 2,614,746	$ 0	$ 0	$ 2,378,774	$ 235,972
Preferred stock, balance, shares (in shares) at May. 31, 2026	400		400