Earning Per Common Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Common Share [Abstract]
Income from continuing operations	$ 7,275	$ 9,793	$ 7,257	$ 4,951	$ 6,643	$ 8,463	[1]	$ (3,321)	[2]	$ 2,979	$ 29,276	$ 14,764	$ 22,067
Income from discontinued operations			38	(24)	22	(238)	[1]	1,250	[2]	390	14	1,424	828
Net income	$ 7,275	$ 9,793	$ 7,295	$ 4,927	$ 6,665	$ 8,225	[1]	$ (2,071)	[2]	$ 3,369	$ 29,290	$ 16,188	$ 22,895
Weighted average shares											10,175,000	10,124,000	10,209,000
Denominator for basic earnings per common share											10,175,000	10,124,000	10,209,000
Employee stock options											11,000	16,000	29,000
Other stock compensation plans											74,000	94,000	74,000
Dilutive potential common shares											85,000	110,000	103,000
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversions											10,260,000	10,234,000	10,312,000
Basic earnings per common share: From continuing operations	$ 0.71	$ 0.96	$ 0.71	$ 0.49	$ 0.65	$ 0.83	[1]	$ (0.33)	[2]	$ 0.30	$ 2.88	$ 1.46	$ 2.16
Basic earnings per common share: From discontinued operations			$ 0.00	$ 0.00	$ 0.00	$ (0.02)	[1]	$ 0.12	[2]	$ 0.04	$ 0.00	$ 0.14	$ 0.08
Basic earnings per common share	$ 0.71	$ 0.96	$ 0.72	$ 0.49	$ 0.66	$ 0.81	[1]	$ (0.20)	[2]	$ 0.33	$ 2.88	$ 1.60	$ 2.24
Diluted earnings per common share: From continuing operations	$ 0.71	$ 0.95	$ 0.71	$ 0.48	$ 0.65	$ 0.83	[1]	$ (0.33)	[2]	$ 0.29	$ 2.85	$ 1.44	$ 2.14
Diluted earnings per common share: From discontinued operations			$ 0.00	$ 0.00		$ (0.02)	[1]	$ 0.12	[2]	$ 0.04	$ 0.00	$ 0.14	$ 0.08
Diluted earnings per common share	$ 0.71	$ 0.95	$ 0.71	$ 0.48	$ 0.65	$ 0.81	[1]	$ (0.20)	[2]	$ 0.32	$ 2.85	$ 1.58	$ 2.22
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount											0	0	0
Common Stock, Dividends, Per Share, Cash Paid	$ 0.03	$ 0.03	$ 0.03	$ 0.03	$ 0.025	$ 0.025	[1]	$ 0.025	[2]	$ 0.025	$ 0.12	$ 0.10	$ 0.10

[1] Includes a pre-tax loss of approximately $315 from the Company’s sale of Precise.

[2] Includes a pre-tax gain of approximately $3,508 from the Company’s sale of SSD.