Other comprehensive (loss) income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Before-Tax Amount
Other comprehensive (loss) income	$ (8,094)	$ 9,202
Tax Expense (Benefit)
Other comprehensive (loss) income	(1,498)	1,895
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes:	(6,596)	7,307
Net unrealized gains and losses on investments
Before-Tax Amount
Change in net unrealized gains and losses on investments	(2,881)	8,376
Reclassification adjustments for realized gains and losses on investments	190	116
Other comprehensive (loss) income	(2,691)	8,492
Tax Expense (Benefit)
Change in net unrealized gains and losses on investments	(605)	1,759
Reclassification adjustments for realized gains and losses on investments	40	24
Other comprehensive (loss) income	(565)	1,783
Net-of-Tax Amount
Change in net unrealized gains and losses on investments	(2,276)	6,617
Reclassification adjustments for realized gains and losses on investments	150	92
Other comprehensive (loss) income, net of taxes:	(2,126)	6,709
Foreign currency translation adjustments
Before-Tax Amount
Other comprehensive (loss) income	(5,403)	710
Tax Expense (Benefit)
Other comprehensive (loss) income	(933)	112
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes:	$ (4,470)	$ 598