CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive (loss) income	Treasury stock	Noncontrolling interests
Balances at beginning of period at Dec. 31, 2021	$ 1,294,735	$ 27,246	$ 282,376	$ 974,800	$ 253	$ (2,666)	$ 12,726
Increase (Decrease) in Stockholders' Equity
Net income attributable to Stewart	119,557			119,557
Dividends on Common Stock	(20,569)			(20,569)
Stock-based compensation	6,440	126	6,314
Stock repurchases	(2,551)	(37)	(2,514)
Stock option and employee stock purchase plan exercises	2,713	55	2,658
Change in net unrealized gains and losses on investments, net of taxes	(32,592)				(32,592)
Reclassification adjustment for realized gains and losses on investments, net of taxes	(302)				(302)
Foreign currency translation adjustments, net of taxes	(7,561)				(7,561)
Net income attributable to noncontrolling interests	9,240						9,240
Distributions to noncontrolling interests	(9,483)						(9,483)
Net effect of other changes in ownership	194						194
Balances at end of period at Jun. 30, 2022	1,359,821	27,390	288,834	1,073,788	(40,202)	(2,666)	12,677
Balances at beginning of period at Mar. 31, 2022	1,324,788	27,367	284,524	1,022,456	(19,210)	(2,666)	12,317
Increase (Decrease) in Stockholders' Equity
Net income attributable to Stewart	61,660			61,660
Dividends on Common Stock	(10,328)			(10,328)
Stock-based compensation	4,201	18	4,183
Stock repurchases	(89)	(1)	(88)
Stock option exercises	221	6	215
Change in net unrealized gains and losses on investments, net of taxes	(12,694)				(12,694)
Reclassification adjustment for realized gains and losses on investments, net of taxes	(117)				(117)
Foreign currency translation adjustments, net of taxes	(8,181)				(8,181)
Net income attributable to noncontrolling interests	5,225						5,225
Distributions to noncontrolling interests	(4,915)						(4,915)
Net effect of other changes in ownership	50						50
Balances at end of period at Jun. 30, 2022	1,359,821	27,390	288,834	1,073,788	(40,202)	(2,666)	12,677
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 attributable to Stewart	7,625			7,625
Dividends on Common Stock	(24,983)			(24,983)
Stock-based compensation	7,043	117	6,926
Stock repurchases	(1,353)	(32)	(1,321)
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	852				852
Reclassification adjustment for realized gains and losses on investments, net of taxes	313				313
Foreign currency translation adjustments, net of taxes	4,852				4,852
Net income attributable to noncontrolling interests	6,939						6,939
Distributions to noncontrolling interests	(7,549)						(7,549)
Balances at end of period at Jun. 30, 2023	1,365,995	27,620	304,405	1,074,458	(45,326)	(2,666)	7,504
Balances at beginning of period at Mar. 31, 2023	1,359,752	27,598	300,225	1,071,320	(44,036)	(2,666)	7,311
Increase (Decrease) in Stockholders' Equity
Net income attributable to Stewart	15,815			15,815
Dividends on Common Stock	(12,677)			(12,677)
Stock-based compensation	4,284	24	4,260
Stock repurchases	(82)	(2)	(80)
Change in net unrealized gains and losses on investments, net of taxes	(5,765)				(5,765)
Reclassification adjustment for realized gains and losses on investments, net of taxes	221				221
Foreign currency translation adjustments, net of taxes	4,254				4,254
Net income attributable to noncontrolling interests	3,967						3,967
Distributions to noncontrolling interests	(3,774)						(3,774)
Balances at end of period at Jun. 30, 2023	$ 1,365,995	$ 27,620	$ 304,405	$ 1,074,458	$ (45,326)	$ (2,666)	$ 7,504