Stock-Based Compensation (Summary Of The Status Of Nonvested Share Awards) (Details)	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Nonvested Share Awards [Roll Forward]
Nonvested, Shares, Beginning Balance | shares	1,120,491
Granted, Shares | shares	225,152
Vested, Shares | shares	(238,899)
Forfeited, Shares | shares	(3,088)
Nonvested, Shares, Ending Balance | shares	1,103,656
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 55.58
Granted , Weighted Average Grant Date Fair Value | $ / shares	70.92
Vested , Weighted Average Grant Date Fair Value | $ / shares	47.60
Forfeited , Weighted Average Grant Date Fair Value | $ / shares	55.13
Nonvested , Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 60.44