Earnings Per Share (Computations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Line Items]
Anti-dilutive stock options	15,600	49,140
Net income (loss)	$ 7,443	$ (1,616)
Net income (loss) applicable to common shares	$ 7,443	$ (1,616)
Basic EPS, Common Shares (Denominator) (in shares)	12,358,849	10,738,365
Basic EPS (in dollars per share)	$ 0.60	$ (0.15)
Diluted EPS, Stock options, Common Shares (Denominator) (in shares)	7,521	0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	17,387	0
Diluted EPS, Income (Numerator)	$ 7,443	$ (1,616)
Diluted EPS, Common Shares (Denominator) (in shares)	12,383,757	10,738,365
Diluted EPS (in dollars per share)	$ 0.60	$ (0.15)