Summary of Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 16,472
Revenues	$ 645,413	$ 628,941	$ 721,088
Percentage of revenues	100.00%	100.00%
Electronic Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 20,015
Revenues	$ 412,648	$ 392,633
Percentage of revenues	100.00%	100.00%
Structural Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ (3,543)
Revenues	$ 232,765	$ 236,308
Percentage of revenues	100.00%	100.00%
Military and space
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 30,989
Revenues	$ 453,848	$ 422,859
Percentage of revenues	70.30%	67.20%
Military and space | Electronic Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 19,235
Revenues	$ 327,911	$ 308,676
Percentage of revenues	79.50%	78.60%
Military and space | Structural Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 11,754
Revenues	$ 125,937	$ 114,183
Percentage of revenues	54.10%	48.30%
Commercial aerospace
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ (12,411)
Revenues	$ 155,731	$ 168,142
Percentage of revenues	24.10%	26.80%
Commercial aerospace | Electronic Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ 2,886
Revenues	$ 48,903	$ 46,017
Percentage of revenues	11.80%	11.70%
Commercial aerospace | Structural Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ (15,297)
Revenues	$ 106,828	$ 122,125
Percentage of revenues	45.90%	51.70%
Industrial
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ (2,106)
Revenues	$ 35,834	$ 37,940
Percentage of revenues	5.60%	6.00%
Industrial | Electronic Systems
Disaggregation of Revenue [Line Items]
Change in revenue for the period	$ (2,106)
Revenues	$ 35,834	$ 37,940
Percentage of revenues	8.70%	9.70%