Stock-Based Compensation (Summary Of SAR Activity) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Stock Appreciation Rights [Roll Forward]
Rights Outstanding, Beginning Balance | shares	948,727
Rights Granted | shares	89,829
Rights Forfeited | shares	(4,337)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period | shares	(5,781)
Rights Exercised | shares	(49,866)
Rights Outstanding, Ending Balance | shares	978,572
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 46.82
Weighted Average Exercise Price Granted | $ / shares	65.64
Weighted Average Exercise Price Forfeited | $ / shares	63.62
Weighted Average Exercise Price Expired | $ / shares	52.13
Weighted Average Exercise Price Exercised | $ / shares	26.83
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	$ 49.46
Weighted Average Remaining Contractual Term	5 years 1 month 6 days
Aggregate Intrinsic Value | $	$ 4,468