Earnings Per Share (Computations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Line Items]
Net income	$ 10,360	$ 4,506
Net Income (Loss) Available to Common Stockholders, Basic	$ 10,360	$ 4,506
Basic EPS, Common Shares (Denominator) (in shares)	12,942,099	12,975,429
Basic EPS (in dollars per share)	$ 0.80	$ 0.35
Diluted EPS, Stock options, Common Shares (Denominator) (in shares)	4,511	4,516
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	49,781	48,404
Diluted EPS, Income (Numerator)	$ 10,360	$ 4,506
Diluted EPS, Common Shares (Denominator) (in shares)	13,002,062	13,028,715
Diluted EPS (in dollars per share)	$ 0.80	$ 0.35
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	5,671	366