Employee Benefit Plans - Narrative (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) compensation_plan	Dec. 31, 2019 USD ($) compensation_plan	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of unfunded supplemental retirement plans | compensation_plan	3
Accumulated benefit obligations	$ 300,000	$ 400,000
Number of company sponsored 401(K) defined contribution plans | compensation_plan	1
Provision for matching and profit sharing contribution	$ 2,600,000	2,700,000	$ 2,600,000
Estimated net actuarial loss for the defined benefit pension plan	1,000,000.0
Excess of accumulated benefit obligation over fair value of plan assets	12,200,000
Pension liability	9,600,000	$ 8,100,000
Estimated employer Contribution to pension plan in next fiscal year	$ 900,000
Plan One covering all employees, other than employees of Miltec
Defined Benefit Plan Disclosure [Line Items]
Contribution by employee towards defined benefit plan	25.00%
Contribution by employer towards defined benefit plan	50.00%
Employee contribution compensation limit	6.00%
Executives and Directors
Defined Benefit Plan Disclosure [Line Items]
Number of unfunded supplemental retirement plans | compensation_plan	2	2
Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Liability for labarge deferred compensation plan	$ 0	$ 0
Interest on labarge deferred compensation plan	$ 100,000	$ 100,000