Basis of Presentation (Earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income	$ 720,345	$ 652,435	$ 1,252,604	$ 1,107,158
Less: earnings distributed to participating securities	(122)	(217)	(248)	(434)
Less: undistributed earnings allocated to participating securities	(2,365)	(3,672)	(4,597)	(6,721)
Numerator for basic earnings per share	717,858	648,546	1,247,759	1,100,003
Add back: undistributed earnings allocated to participating securities	2,365	3,672	4,597	6,721
Less: undistributed earnings reallocated to participating securities	(2,347)	(3,644)	(4,565)	(6,677)
Numerator for diluted earnings per share	$ 717,876	$ 648,574	$ 1,247,791	$ 1,100,047
Denominator:
Basic shares outstanding (shares)	222,160	236,328	223,635	241,036
Effect of dilutive securities (shares)	1,232	1,318	1,031	1,193
Diluted shares outstanding (shares)	223,392	237,646	224,666	242,229
Earnings Per Share [Abstract]
Basic earnings (usd per share)	$ 3.23	$ 2.74	$ 5.58	$ 4.56
Diluted earnings (usd per share)	$ 3.21	$ 2.73	$ 5.55	$ 4.54