Stockholders' Equity (Details) - USD ($)	3 Months Ended		6 Months Ended		126 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025
Stockholders' Equity.
Authorized stock repurchase amount	$ 2,000,000,000		$ 2,000,000,000		$ 2,000,000,000
Cost of shares of common stock repurchased	0	$ 0	0	$ 0	1,800,000,000
Cumulative common stock repurchase transactions fees.					$ 537,000
Common stock dividends	$ 15,808,000	$ 10,397,000	$ 30,813,000	$ 20,817,000