Earning Per Common Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Common Share [Abstract]
Income from continuing operations	$ 6,848	$ 7,257	$ 10,497	$ 12,208
Income from discontinued operations	14	38	14	14
Net income	$ 6,862	$ 7,295	$ 10,511	$ 12,222
Weighted average shares	10,223	10,173	10,210	10,165
Denominator for basic earnings per common share	10,223	10,173	10,210	10,165
Employee stock options	6	12	7	12
Other stock compensation plans	80	68	92	61
Dilutive potential common shares	86	80	99	73
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversions	10,309	10,253	10,309	10,238
Basic earnings per common share: From continuing operations	$ 0.67	$ 0.71	$ 1.03	$ 1.20
Basic earnings per common share: From discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Basic earnings per common share	$ 0.67	$ 0.72	$ 1.03	$ 1.20
Diluted earnings per common share: From continuing operations	$ 0.66	$ 0.71	$ 1.02	$ 1.19
Diluted earnings per common share: From discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Diluted earnings per common share	$ 0.67	$ 0.71	$ 1.02	$ 1.19
Common Stock, Dividends, Per Share, Cash Paid	$ 0.03	$ 0.03	$ 0.06	$ 0.06