Segments and Related Information (Schedule of Significant Customers, Revenue Concentration Information) (Details) (Operating Segments [Member], Customer Concentration Risk [Member], Sales Revenue, Services, Net [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
AT&T [Member] | Communications [Member]
Revenue, Major Customer [Line Items]
Consolidated revenue, major customer, percentage	18.00%	18.00%	24.00%
Segment reporting, disclosure of major customers	The Company's relationship with AT&T is based upon master service agreements, other service agreements and construction/installation contracts for both AT&T's wireless and wireline infrastructure businesses. Revenue from AT&T is included in the Communications segment.
DIRECTV[Member] | Communications [Member]
Revenue, Major Customer [Line Items]
Consolidated revenue, major customer, percentage	14.00%	17.00%	20.00%
Segment reporting, disclosure of major customers	The Company's relationship with DIRECTV® is based upon an agreement to provide installation and maintenance services for DIRECTV®. Revenue from DIRECTV® is included in the Communications segment.
Enbridge [Member] | Oil and Gas [Member]
Revenue, Major Customer [Line Items]
Consolidated revenue, major customer, percentage	18.00%	3.00%	0.00%
Segment reporting, disclosure of major customers	The Company's relationship with Enbridge, Inc. is based upon various construction contracts for natural gas pipelines. Revenue from Enbridge, Inc. is included in the Oil and Gas segment.