CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 223,358	$ 211,964	$ 417,427	$ 607,425
Available for sale investments:
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income	9,522	54,372	37,662	77,787
Unrealized gains (losses) arising during the period, net of reclassification adjustment	114,643	18,684	229,980	(18,378)
Foreign currency translation adjustment	16,023	(1,803)	15,867	(10,754)
Total other comprehensive income (loss), net of tax	130,666	16,881	245,847	(29,132)
Comprehensive income	354,024	228,845	663,274	578,293
Unrealized gains (losses) arising during the period for which an allowance for expected credit losses has not been recognized
Available for sale investments:
Unrealized gains (losses) arising during period	104,546	(35,586)	192,076	(95,602)
Unrealized gains (losses) arising during the period for which an allowance for expected credit losses has been recognized
Available for sale investments:
Unrealized gains (losses) arising during period	$ 575	$ (102)	$ 242	$ (563)