Segment Information (Details 1) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 524,925	$ 520,086
T&D [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	204,309	190,105
C&I [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	92,939	69,640
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 227,677	$ 260,341