Common Stock and Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Details of earnings per share calculations
Net income- continuing operations	$ 2,412	$ 1,994
Net income (loss)-discontinued operations	374	(84)
Net income	$ 2,786	$ 1,910
Weighted average common shares outstanding:
Basic	38,687	37,690
Incremental shares with dilutive effect:
Diluted	39,064	38,352
Basic income (loss) per share
Continuing Operations	$ 0.06	$ 0.05
Discontinued operations	$ 0.01	$ 0.00
Total net income per share	$ 0.07	$ 0.05
Diluted income (loss) per share
Continuing operations	$ 0.06	$ 0.05
Discontinued operations	$ 0.01	$ 0.00
Total net income per share	$ 0.07	$ 0.05
Stock Options [Member]
Incremental shares with dilutive effect:
Stock options	199	536
Restricted Stock [Member]
Incremental shares with dilutive effect:
Stock options	178	126

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