Earnings Per Common Share (Reconciliation Of Numerators And Denominators ) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic EPS:
Net income	$ 18,180	$ 22,285
Less: income allocated to participating securities	(81)	0
Basic EPS per common share	$ 18,099	$ 22,285
Basic (in shares)	29,230,788	29,587,217
Basic (in dollars per share)	$ 0.62	$ 0.75
Diluted EPS:
Net income	$ 18,180	$ 22,285
Effect of Dilutive Securities	0	0
Diluted EPS per common share	$ 18,180	$ 22,285
Basic (in shares)	29,230,788	29,587,217
Effect of Dilutive Securities (in shares)	168,326	156,178
Diluted (in shares)	29,399,114	29,743,395
Diluted (in dollars per share)	$ 0.62	$ 0.75