CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME(UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 194,071	$ 395,459
Available for sale investments:
Unrealized gains (losses) arising during the period, net of reclassification adjustment	115,337	(37,062)
Foreign currency translation adjustment	(156)	(8,951)
Total other comprehensive income (loss), net of tax	115,181	(46,013)
Comprehensive income	309,252	349,446
Unrealized gains (losses) on available for sale investments
Available for sale investments:
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income	28,087	23,415
Unrealized gains (losses) arising during the period, net of reclassification adjustment	115,337	(37,062)
Unrealized gains (losses) on available for sale investments | 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	87,058	(60,059)
Unrealized gains (losses) on available for sale investments | 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	$ 192	$ (418)