Other comprehensive (loss) income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Before-Tax Amount
Other comprehensive (loss) income, before tax,	$ (7,095)	$ 8,261
Tax Expense (Benefit)
Other comprehensive (loss) income, tax	(1,644)	1,890
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes	(5,451)	6,371
Net unrealized gains and losses on investments
Before-Tax Amount
Change in net unrealized gains and losses on investments	(3,570)	6,779
Reclassification adjustments for realized gains and losses on investments	12	46
Other comprehensive (loss) income, before tax,	(3,558)	6,825
Tax Expense (Benefit)
Change in net unrealized gains and losses on investments	(751)	1,423
Reclassification adjustments for realized gains and losses on investments	3	10
Other comprehensive (loss) income, tax	(748)	1,433
Net-of-Tax Amount
Change in net unrealized gains and losses on investments	(2,819)	5,356
Reclassification adjustments for realized gains and losses on investments	9	36
Other comprehensive (loss) income, net of taxes	(2,810)	5,392
Foreign currency translation adjustments
Before-Tax Amount
Other comprehensive (loss) income, before tax,	(3,537)	1,436
Tax Expense (Benefit)
Other comprehensive (loss) income, tax	(896)	457
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes	$ (2,641)	$ 979