Income Taxes - Schedule of Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income tax expense (benefit) from operations:
Current income tax expense (benefit)—federal	$ 196,988	$ 217,929	$ 145,700
Current income tax expense (benefit)—state	219	206	180
Deferred income tax expense (benefit)—federal	77,530	37,740	77,631
Provision for income tax expense (benefit)	274,737	255,875	223,511
Shareholders' equity:
Other comprehensive income (loss)	68,656	197,427	4,762
Income tax expense (benefit)	$ 343,393	$ 453,302	$ 228,273