Restructuring Activities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,800	$ 3,400	$ 5,400	$ 2,200	$ 0	$ 14,671	$ 8,360
Restructuring Plan, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					23,600
Restructuring charges					0	$ 14,800	$ 8,800
Non-cash payments					735
Restructuring Plan, 2017 | Severance and benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Non-cash payments					0
Restructuring Plan, 2017 | Lease termination
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Non-cash payments					735
Restructuring Plan, 2017 | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Non-cash payments					0
Restructuring Plan, 2017 | Professional service fees
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Non-cash payments					0
Restructuring Plan, 2017 | Electronic Systems
Restructuring Cost and Reserve [Line Items]
Inventory write-down					100
Restructuring Plan, 2017 | Electronic Systems | Severance and benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					3,800
Restructuring Plan, 2017 | Electronic Systems | Lease termination
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					900
Restructuring Plan, 2017 | Electronic Systems | Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					900
Restructuring Plan, 2017 | Electronic Systems | Professional service fees
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					200
Restructuring Plan, 2017 | Electronic Systems | Property and equipment impairment due to restructuring
Restructuring Cost and Reserve [Line Items]
Non-cash payments					100
Restructuring Plan, 2017 | Structural Systems
Restructuring Cost and Reserve [Line Items]
Inventory write-down					500
Restructuring Plan, 2017 | Structural Systems | Severance and benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					3,000
Restructuring Plan, 2017 | Structural Systems | Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cost incurred to date					400
Restructuring Plan, 2017 | Structural Systems | Property and equipment impairment due to restructuring
Restructuring Cost and Reserve [Line Items]
Non-cash payments					9,800
Corporate Segment | Restructuring Plan, 2017 | Severance and benefits
Restructuring Cost and Reserve [Line Items]
Accrued severance and loss on early exit					1,400
Corporate Segment | Restructuring Plan, 2017 | Professional service fees
Restructuring Cost and Reserve [Line Items]
Accrued severance and loss on early exit					1,000
Corporate Segment | Restructuring Plan, 2017 | Modification of stock-based compensation awards
Restructuring Cost and Reserve [Line Items]
Accrued severance and loss on early exit					$ 1,400