Discontinued Operations (Narrative) (Details) (Globetec [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		0 Months Ended
	Aug. 31, 2013	Mar. 31, 2014	Mar. 31, 2014 Surety Bond [Member]	Mar. 31, 2014 Surety Bond [Member] Plan [Member]
Discontinued Operations Disclosures [Line Items]
Discontinued operations description		In 2012, the Company's board of directors approved a plan of sale for its Globetec business. 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%
Outstanding bonds, amount			$ 15.9
Estimated cost to complete bonded projects				$ 0.5