Earnings per Share Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 145,449	$ 139,016	$ 430,256	$ 360,083
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	27,644	27,909	27,857	27,769
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Dilutive Securities	890	928	846	862
Diluted Weighted Average Number of Shares Outstanding	28,534	28,837	28,703	28,631
Earnings Per Share, Basic	$ 5.26	$ 4.98	$ 15.45	$ 12.97
Earnings Per Share, Diluted	$ 5.10	$ 4.82	$ 14.99	$ 12.58
Anti-dilutive stock equivalent awards not included in the calculation of diluted loss per share	0	0	0	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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