Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income	$ 78,885	$ 101,699
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	413	548
Net Income (Loss) Available to Common Stockholders, Basic	$ 78,472	$ 101,151
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)	57	64
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights	205,000	213,000
Weighted average shares outstanding: [Abstract]
Basic (in shares)	38,205	38,877
Effect of dilutive securities: [Abstract]
Stock options and employee stock purchase plan (in shares)	262	312
Diluted (in shares)	38,467	39,189
Earnings Per Share, Basic [Abstract]
Basic (in dollars per share)	$ 2.05	$ 2.60
Earnings Per Share, Basic and Diluted [Abstract]
Diluted (in dollars per share)	$ 2.04	$ 2.58