Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net Income	$ 101,699	$ 179,261
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	(548)	(1,051)
Net Income (Loss) Available to Common Stockholders, Basic	$ 101,151	$ 178,210
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive stock options excluded from diluted earnings per share computations (in shares)	64	1
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights	213,000	239,000
Weighted average shares outstanding: [Abstract]
Basic (in shares)	38,877	39,932
Effect of dilutive securities: [Abstract]
Stock options and employee stock purchase plan (in shares)	312	460
Diluted (in shares)	39,189	40,392
Earnings Per Share, Basic [Abstract]
Basic (in dollars per share)	$ 2.60	$ 4.46
Earnings Per Share, Basic and Diluted [Abstract]
Diluted (in dollars per share)	$ 2.58	$ 4.41