Discontinued Operations and Divestitures (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loss from discontinued operations, net of tax
Revenue		$ 943	$ 5,586
Loss from operations of discontinued operations before income tax benefit	(32)	(957)	(4,408)
Income tax benefit	13	366	1,740
Loss from operations of discontinued operations, net of tax	$ (19)	$ (591)	$ (2,668)