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, 2021	$ 1,294,735	$ 27,246	$ 282,376	$ 974,800	$ 253	$ (2,666)	$ 12,726
Increase (Decrease) in Stockholders' Equity
Net loss attributable to Stewart	57,897			57,897
Dividends on common stock	(10,241)			(10,241)
Stock-based compensation	2,239	108	2,131
Stock repurchases	(2,462)	(36)	(2,426)
Stock option and employee stock purchase plan exercises	2,492	49	2,443
Change in net unrealized gains and losses on investments, net of taxes	(19,898)				(19,898)
Reclassification adjustment for realized gains and losses on investments, net of taxes	(185)				(185)
Foreign currency translation adjustments, net of taxes	620				620
Net income attributable to noncontrolling interests	4,015						4,015
Distributions to noncontrolling interests	(4,568)						(4,568)
Net effect of other changes in ownership	144						144
Balances at end of period at Mar. 31, 2022	1,324,788	27,367	284,524	1,022,456	(19,210)	(2,666)	12,317
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 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