Income (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Income from continuing operations, net of tax	$ 10,952	$ 17,041	$ 16,048	$ 15,862
Weighted average number of common shares outstanding	13,144	12,651	12,918	12,468
Income from continuing operations, net of tax per common share	$ 0.83	$ 1.35	$ 1.24	$ 1.27
Discontinued operations	0	(281)	0	5,722
Discontinued operations per common share	$ 0.00	$ (0.03)	$ 0.00	$ 0.46
Net income	$ 10,952	$ 16,760	$ 16,048	$ 21,584
Net income per common share	$ 0.83	$ 1.32	$ 1.24	$ 1.73