Earnings Per Share (Computations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Line Items]
Anti-dilutive stock options			7,700	15,600
Net income	$ 8,061	$ 6,899	$ 23,718	$ 20,622
Net Income (Loss) Available to Common Stockholders, Basic	$ 8,061	$ 6,899	$ 23,718	$ 20,622
Basic EPS, Common Shares (Denominator) (in shares)	12,412,982	12,374,350	12,555,411	12,366,612
Basic EPS (in dollars per share)	$ 0.65	$ 0.56	$ 1.89	$ 1.67
Diluted EPS, Stock options, Common Shares (Denominator) (in shares)	4,654	7,349	5,006	7,561
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	50,142	57,352	53,965	56,054
Diluted EPS, Income (Numerator)	$ 8,061	$ 6,899	$ 23,718	$ 20,622
Diluted EPS, Common Shares (Denominator) (in shares)	12,467,777	12,439,051	12,614,382	12,430,227
Diluted EPS (in dollars per share)	$ 0.65	$ 0.55	$ 1.88	$ 1.66