Earnings per Share Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 91,839	$ 84,866
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	28,424	29,015
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Incremental Common Shares Attributable to Stock Options	336	431
Deferred Compensation Awards	312	297
Diluted Weighted Average Number of Shares Outstanding	29,072	29,743
Earnings Per Share, Basic	$ 3.23	$ 2.92
Earnings Per Share, Diluted	$ 3.16	$ 2.85
Anti-dilutive stock equivalent awards not included in the calculation of diluted loss per share	434	0