Other comprehensive (loss) income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Before-Tax Amount
Other comprehensive (loss) income, before tax,	$ (1,047)	$ (1,916)	$ (9,141)	$ 7,286
Tax Expense (Benefit)
Other comprehensive (loss) income, tax	(295)	(626)	(1,793)	1,269
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes:	(752)	(1,290)	(7,348)	6,017
Net unrealized gains and losses on investments
Before-Tax Amount
Change in net unrealized gains and losses on investments	145	(7,298)	(2,736)	1,078
Reclassification adjustments for realized gains and losses on investments	493	280	683	396
Other comprehensive (loss) income, before tax,	638	(7,018)	(2,053)	1,474
Tax Expense (Benefit)
Change in net unrealized gains and losses on investments	31	(1,533)	(574)	226
Reclassification adjustments for realized gains and losses on investments	103	59	143	83
Other comprehensive (loss) income, tax	134	(1,474)	(431)	309
Net-of-Tax Amount
Change in net unrealized gains and losses on investments	114	(5,765)	(2,162)	852
Reclassification adjustments for realized gains and losses on investments	390	221	540	313
Other comprehensive (loss) income, net of taxes:	504	(5,544)	(1,622)	1,165
Foreign currency translation adjustments
Before-Tax Amount
Other comprehensive (loss) income, before tax,	(1,685)	5,102	(7,088)	5,812
Tax Expense (Benefit)
Other comprehensive (loss) income, tax	(429)	848	(1,362)	960
Net-of-Tax Amount
Other comprehensive (loss) income, net of taxes:	$ (1,256)	$ 4,254	$ (5,726)	$ 4,852