Restructuring - Restructuring Costs by Segment (Details) - Jun. 30, 2015 - Restructuring Plan 2014 [Member] - Infrastructure Solutions [Member] - USD ($) $ in Thousands	Total	Total
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	$ 5,694	$ 9,232
Severance and benefit costs [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	178	694
Lease termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	26	168
Allowance for doubtful accounts [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	2,290	1,291
Currency translation [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	411	820
Other restructuring costs [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	$ 2,789	$ 6,259