Goodwill and Other Intangible Assets - Carrying Amount of Finite-lived and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 229,645	$ 191,945
Accumulated Amortization	91,283	79,853
Net Carrying Amount	138,362	112,092
Electronic Systems
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	164,545	164,545
Accumulated Amortization	71,527	62,108
Net Carrying Amount	93,018	102,437
Structural Systems
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	65,100	27,400
Accumulated Amortization	19,756	17,745
Net Carrying Amount	$ 45,344	9,655
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets (in years)	17 years
Gross Carrying Amount	$ 221,900	187,200
Accumulated Amortization	88,838	77,824
Net Carrying Amount	$ 133,062	109,376
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets (in years)	14 years
Gross Carrying Amount	$ 5,500	2,500
Accumulated Amortization	450	193
Net Carrying Amount	$ 5,050	2,307
Contract renewal
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets (in years)	14 years
Gross Carrying Amount	$ 1,845	1,845
Accumulated Amortization	1,757	1,625
Net Carrying Amount	$ 88	220
Technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets (in years)	15 years
Gross Carrying Amount	$ 400	400
Accumulated Amortization	238	211
Net Carrying Amount	$ 162	$ 189