Earnings Per Share (Calculation of Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 4,058	$ 2,800
Weighted average shares outstanding - Basic (in shares)	12,715,000	12,670,000
Dilutive effect of common stock equivalents-options	16,000	21,000
Dilutive effect of common stock equivalents-restricted stock units		16,000
Weighted average shares outstanding - Diluted (in shares)	12,731,000	12,707,000
Earnings per common share - Basic (in dollars per share)	$ 0.32	$ 0.22
Earnings per common share - Diluted (in dollars per share)	$ 0.32	$ 0.22
Weighted average common stock excluded from calculation of diluted EPS	0	0