Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of activity for discontinued operations
Revenue from discontinued operations	$ 2,483	$ 4,889	$ 8,866
Operating loss before income taxes	(350)	(809)	(733)
Income tax benefit for discontinued operations	108	274	281
Gain on disposal, before taxes	1,168	231	247
Income tax expense on disposal	(359)	(79)	(95)
Income (Loss) from discontinued operations	$ 567	$ (383)	$ (300)