Earnings per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Details of earnings per share calculations
Net income- continuing operations	$ 2,154	$ 4,682	$ 7,398	$ 1,994	$ 11,338	$ 5,927	$ 3,339	$ 3,647	$ 16,229	$ 24,251	$ 10,806
Net (loss) - discontinued operations	(137)	(173)	(236)	(84)	(561)	(3,691)	(718)	(1,147)	(630)	(6,118)	0
Net income	$ 2,017	$ 4,509	$ 7,162	$ 1,910	$ 10,777	$ 2,236	$ 2,621	$ 2,500	$ 15,599	$ 18,133	$ 10,806
Weighted average common shares outstanding
Basic									38,068	37,555	37,413
Incremental shares with dilutive effect:
Diluted									38,677	38,568	38,241
Basic income (loss) per share
Continuing operations	$ 0.05	$ 0.12	$ 0.19	$ 0.05	$ 0.30	$ 0.16	$ 0.09	$ 0.10	$ 0.43	$ 0.65	$ 0.29
Discontinued operations	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)	$ (0.10)	$ (0.02)	$ (0.03)	$ (0.02)	$ (0.16)	$ 0.00
Total Net income per share	$ 0.05	$ 0.12	$ 0.18	$ 0.05	$ 0.29	$ 0.06	$ 0.07	$ 0.07	$ 0.41	$ 0.48	$ 0.29
Diluted income (loss) per share
Continuing operations	$ 0.05	$ 0.12	$ 0.19	$ 0.05	$ 0.29	$ 0.15	$ 0.09	$ 0.09	$ 0.42	$ 0.63	$ 0.28
Discontinued operations	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)	$ (0.09)	$ (0.02)	$ (0.03)	$ (0.02)	$ (0.16)	$ 0.00
Total Net income per share	$ 0.05	$ 0.12	$ 0.18	$ 0.05	$ 0.28	$ 0.06	$ 0.07	$ 0.06	$ 0.40	$ 0.47	$ 0.28
Stock Options [Member]
Incremental shares with dilutive effect:
Stock options									422	824	778
Restricted Stock [Member]
Incremental shares with dilutive effect:
Stock options									187	189	50