Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) [Parenthetical] (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) [Abstract]
Gain on sales of discontinued operations net of provision for income taxes	$ 97	$ 12	$ 97	$ 39

Amount of tax expense or benefit on gain (loss), not previously recognized, resulting from the sale of a business component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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