Earnings Per Share (Computations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Line Items]
Anti-dilutive stock options	49,140	57,000
Net income (loss)	$ (1,616)	$ 4,062
Net income (loss) applicable to common shares	$ (1,616)	$ 4,062
Basic EPS, Common Shares (Denominator) (in shares)	10,738,365	10,671,856
Basic EPS (in dollars per share)	$ (0.15)	$ 0.38
Diluted EPS, Stock options, Common Shares (Denominator) (in shares)	0	7,445
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	0
Diluted EPS, Income (Numerator)	$ (1,616)	$ 4,062
Diluted EPS, Common Shares (Denominator) (in shares)	10,738,365	10,679,301
Diluted EPS (in dollars per share)	$ (0.15)	$ 0.38