Revenue Recognition - Summary of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 113,777	$ 115,651	$ 301,049	$ 353,959
Transportation
Disaggregation of Revenue [Line Items]
Revenues	65,277	71,559	164,940	230,743
Industrial
Disaggregation of Revenue [Line Items]
Revenues	24,204	19,750	65,260	57,406
Medical
Disaggregation of Revenue [Line Items]
Revenues	10,201	10,537	32,609	29,176
Aerospace and Defense
Disaggregation of Revenue [Line Items]
Revenues	11,038	9,025	29,416	23,536
Telecom & IT
Disaggregation of Revenue [Line Items]
Revenues	$ 3,057	$ 4,780	$ 8,824	$ 13,098