CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Treasury stock	Noncontrolling interests
Balances at beginning of period at Dec. 31, 2022	$ 1,370,265	$ 27,483	$ 296,861	$ 1,091,816	$ (51,343)	$ (2,666)	$ 8,114
Increase (Decrease) in Stockholders' Equity
Net income (loss) attributable to Stewart	(8,190)			(8,190)
Dividends on Common Stock	(12,306)			(12,306)
Stock-based compensation	2,759	93	2,666
Stock repurchases	(1,271)	(30)	(1,241)
Stock option and employee stock purchase plan exercises	1,991	52	1,939
Change in net unrealized gains and losses on investments, net of taxes	6,617				6,617
Reclassification adjustment for realized gains and losses on investments, net of taxes	92				92
Foreign currency translation adjustments, net of taxes	598				598
Net income attributable to noncontrolling interests	2,972						2,972
Distributions to noncontrolling interests	(3,775)						(3,775)
Balances at end of period at Mar. 31, 2023	1,359,752	27,598	300,225	1,071,320	(44,036)	(2,666)	7,311
Balances at beginning of period at Dec. 31, 2023	1,378,549	27,723	310,728	1,070,841	(35,215)	(2,666)	7,138
Increase (Decrease) in Stockholders' Equity
Net income (loss) attributable to Stewart	3,130			3,130
Dividends on Common Stock	(13,163)			(13,163)
Stock-based compensation	2,670	172	2,498
Stock repurchases	(3,390)	(55)	(3,335)
Stock option and employee stock purchase plan exercises	3,583	93	3,490
Change in net unrealized gains and losses on investments, net of taxes	(2,276)				(2,276)
Reclassification adjustment for realized gains and losses on investments, net of taxes	150				150
Foreign currency translation adjustments, net of taxes	(4,470)				(4,470)
Net income attributable to noncontrolling interests	3,080						3,080
Distributions to noncontrolling interests	(3,720)						(3,720)
Balances at end of period at Mar. 31, 2024	$ 1,364,143	$ 27,933	$ 313,381	$ 1,060,808	$ (41,811)	$ (2,666)	$ 6,498