Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Deferred Compensation Trust [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2022	$ 1,579,341	$ 26	$ 277,366	$ (5,248)	$ 1,307,197
Beginning Balance, Shares at Dec. 31, 2022		26,464,000
Stock compensation, including options and long-term incentives	10,219		10,219
Director deferred share activity	1,417		1,417
Director deferred share activity , Shares		2,000
Exercise of stock options less shares withheld for taxes	4,875		4,875
Exercise of stock options less shares withheld for taxes, Shares		35,000
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		48,000
Shares issued for long-term incentive awards, net of shares withheld for taxes	(9,215)	$ 1	(9,216)
Purchase of shares by Deferred Compensation Trust			620	(620)
Sale of shares by Deferred Compensation Trust			(189)	189
Net Income (Loss)	354,857				354,857
Ending Balance at Dec. 31, 2023	1,941,494	$ 27	285,092	(5,679)	1,662,054
Ending Balance, Shares at Dec. 31, 2023		26,549,000
Stock compensation, including options and long-term incentives	12,822		12,822
Director deferred share activity	1,423		1,423
Director deferred share activity , Shares		2,000
Exercise of stock options less shares withheld for taxes	2,574		2,574
Exercise of stock options less shares withheld for taxes, Shares		20,000
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		28,000
Shares issued for long-term incentive awards, net of shares withheld for taxes	(9,107)		(9,107)
Purchase of shares by Deferred Compensation Trust			3,019	(3,019)
Sale of shares by Deferred Compensation Trust			(717)	717
Net Income (Loss)	362,065				362,065
Ending Balance at Dec. 31, 2024	2,311,271	$ 27	295,106	(7,981)	2,024,119
Ending Balance, Shares at Dec. 31, 2024		26,599,000
Stock compensation, including options and long-term incentives	16,204		16,204
Director deferred share activity	1,078		1,078
Director deferred share activity , Shares		2,000
Exercise of stock options less shares withheld for taxes	$ 2,776		2,776
Exercise of stock options less shares withheld for taxes, Shares	11,655	11,000
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		33,000
Shares issued for long-term incentive awards, net of shares withheld for taxes	$ (8,666)		(8,666)
Purchase of shares by Deferred Compensation Trust			1,816	(1,816)
Sale of shares by Deferred Compensation Trust			(709)	709
Net Income (Loss)	255,036				255,036
Ending Balance at Dec. 31, 2025	$ 2,577,699	$ 27	$ 307,605	$ (9,088)	$ 2,279,155
Ending Balance, Shares at Dec. 31, 2025		26,645,000

SAIA INC 10-K