Stock-Based Compensation (Summary Of SAR Activity) (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Stock Appreciation Rights [Roll Forward]
Rights Outstanding, Beginning Balance | shares	896,348
Rights Granted | shares	96,318
Rights Forfeited | shares	(6,390)
Rights Expired | shares	(1,013)
Rights Exercised | shares	(30,216)
Rights Outstanding, Ending Balance | shares	955,047
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 46.21
Weighted Average Exercise Price Granted | $ / shares	70.64
Weighted Average Exercise Price Forfeited | $ / shares	60.86
Weighted Average Exercise Price Expired | $ / shares	60.19
Weighted Average Exercise Price Exercised | $ / shares	44.26
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	$ 48.62
Weighted Average Remaining Contractual Term	5 years 8 months 12 days
Aggregate Intrinsic Value | $	$ 17,024