Taxes on Income (Tax Benefits) - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 18, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory income tax rate (as percent)		35.00%
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		$ 26,212	$ 14,688
DTA, operating loss carryforward, subject to expiration		20,800
DTA, operating loss carryforward, not subject to expiration		5,400
Foreign tax credit carryforwards		3,426	358
DTA. foreign tax credit carryforwards, subject to expiration		3,200
Valuation allowance		15,428	18,897	$ 19,353	$ 7,797
Undistributed earnings on foreign subsidiaries		208,400
Lapse in statute of limitations		83	218	252
Unrecognized tax benefits that would impact effective tax rate		500
Income tax penalties and interest expense		300	300	300
Decrease in unrecognized tax benefits is reasonably possible		300
Underground Solutions
Operating Loss Carryforwards [Line Items]
Foreign earnings repatriated, tax impact	$ 3,200
Foreign earnings repatriated	$ 29,700
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
DTA, tax credit carryforward, not subject to expiration		200
Change in the balance of the valuation allowance for deferred tax assets allocated to income tax expense		1,364	(756)	7,785
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Change in the balance of the valuation allowance for deferred tax assets allocated to income tax expense		$ (4,202)	$ 4,834	$ 5,206