Discontinued Operations (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		0 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Aug. 31, 2013 Globetec [Member]	Jun. 30, 2014 Globetec [Member]
Discontinued Operations Disclosures [Line Items]
Discontinued operations description						In 2012, the Company's board of directors approved a plan of sale for Globetec Construction, LLC ("Globetec"). Accordingly, Globetec's projects and assets are reflected as assets and liabilities of discontinued operations in the condensed unaudited consolidated balance sheets for all periods presented, and Globetec's results of operations are presented as discontinued operations in the condensed unaudited consolidated statements of operations for all periods presented. Effective August 31, 2013, the Company sold all of its membership interests in Globetec for nominal consideration and retained certain contingent assets and liabilities.
Disposal date						Aug. 31, 2013
Discontinued operation, membership interests remaining					0.00%
Net loss from discontinued operations	$ 149	$ 484	$ 272	$ 1,431