Commitments and Contingencies (Textuals) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Oct. 28, 2016	Aug. 31, 2008
Accruals and Payable and Other Long Term Liabilities
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 6,057	$ 6,635	$ 11,609
Accrual for environmental loss contingencies, payments	1,062	1,543
Additions to accrual	442	$ 314
New Hartford
Loss Contingencies [Line Items]
Accrual for payments due to customer under agreement	700
Accrual for environmental loss contingencies	2,300
Accrual for environmental loss contingencies, payments	1,600
New Hartford | Liabilities, Other Accruals and Payables
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	100
Bloomfield
Loss Contingencies [Line Items]
Accrual for payments due to customer under agreement	2,600
Accrual for environmental loss contingencies					$ 10,300
Accrual for environmental loss contingencies, payments	12,900
Environmental liability, discounted amount					10,300
Undiscounted estimated remediation liability	6,213				$ 20,800
Discount rate					8.00%
Bloomfield | Liabilities, Other Accruals and Payables
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	600
Rimpar
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, payments	200
Rimpar | Liabilities, Other Accruals and Payables
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	300
Rimpar | Accruals and Payable and Other Long Term Liabilities | GWR Bearing GmbH (GRW)
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies				$ 500
Additions to accrual			$ 4,200
Pension Costs
Loss Contingencies [Line Items]
Accrual for payments due to customer under agreement	300
Unasserted Claim
Loss Contingencies [Line Items]
Accrual for payments due to customer under agreement	200
Unasserted claim	$ 12,400