Restructuring Costs (Schedule of Restructuring Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	$ 3,954	$ 877	$ 2,475
2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,556	877	2,475
Cumulative restructuring charges	10,215
Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	2,398
Severance costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	160	549	1,152
Cumulative restructuring charges	5,821
Severance costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,579
Lease termination costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	0	(4)	88
Cumulative restructuring charges	428
Other costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,396	332	1,235
Cumulative restructuring charges	3,966
Other costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	819
Operating Segments
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	3,791	877	2,484
Operating Segments | Finishing [Member] | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	5	475	2,501
Cumulative restructuring charges	7,615
Operating Segments | Finishing [Member] | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,996
Operating Segments | Finishing [Member] | Severance costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	(35)	314	1,178
Cumulative restructuring charges	4,744
Operating Segments | Finishing [Member] | Severance costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,550
Operating Segments | Finishing [Member] | Lease termination costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	0	(4)	88
Cumulative restructuring charges	428
Operating Segments | Finishing [Member] | Other costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	40	165	1,235
Cumulative restructuring charges	2,443
Operating Segments | Finishing [Member] | Other costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	446
Operating Segments | Engineered Components | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,387	402	(17)
Cumulative restructuring charges	1,848
Operating Segments | Engineered Components | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	404
Operating Segments | Engineered Components | Severance costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	31	235	(17)
Cumulative restructuring charges	325
Operating Segments | Engineered Components | Severance costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	31
Operating Segments | Engineered Components | Lease termination costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	0	0	0
Cumulative restructuring charges	0
Operating Segments | Engineered Components | Other costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	1,356	167	0
Cumulative restructuring charges	1,523
Operating Segments | Engineered Components | Other costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	373
Corporate
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	163	0	(9)
Corporate | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	164	0	(9)
Cumulative restructuring charges	752
Corporate | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	(2)
Corporate | Severance costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	164	0	(9)
Cumulative restructuring charges	752
Corporate | Severance costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	(2)
Corporate | Lease termination costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	0	0	0
Cumulative restructuring charges	0
Corporate | Other costs | 2016 Program
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	0	$ 0	$ 0
Cumulative restructuring charges	0
Corporate | Other costs | Other Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Current period restructuring charges	$ 0