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Long-Term Debt - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Dec. 20, 2019
Oct. 08, 2019
Nov. 30, 2018
Apr. 30, 2018
Oct. 31, 2017
Sep. 30, 2017
Oct. 31, 2015
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Debt Instrument [Line Items]                      
Repayments of debt               $ 169,000 $ 0 $ 3,000  
Loss on extinguishment of debt               180,000 926,000 0  
Purchase price, net of cash acquired               $ 0 0 59,798,000  
Parsons, KS                      
Debt Instrument [Line Items]                      
Proceeds received from sale of property to be leased back                 2,200,000 14,200,000  
Total lease liability from assets sold                 2,200,000 14,200,000  
Parsons, KS | Municipal Bonds                      
Debt Instrument [Line Items]                      
Purchase of industrial revenue bonds                 2,200,000 $ 14,200,000  
Interest rate cap premiums                      
Debt Instrument [Line Items]                      
Hedging asset             $ 135,000,000        
Payments for hedging asset             $ 1,000,000        
2018 Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Debt issuance costs, net     $ 1,800,000                
Accumulated amortization of debt     200,000                
Debt issuance costs     $ 2,000,000                
Term of debt instrument     5 years                
2018 Term Loan                      
Debt Instrument [Line Items]                      
Debt issuance costs, net     $ 1,700,000                
Accumulated amortization of debt     100,000                
Debt issuance costs     $ 1,800,000                
Term of debt instrument     7 years                
Credit Facilities                      
Debt Instrument [Line Items]                      
Face amount of instrument $ 480,000,000.0                    
New Existing Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Amortization of debt issuance costs     $ 500,000                
Loss on extinguishment of debt     900,000                
Existing Term Loan                      
Debt Instrument [Line Items]                      
Amortization of debt issuance costs     400,000                
New Credit Facilities                      
Debt Instrument [Line Items]                      
Debt issuance costs, net     $ 3,500,000                
Nobles Worldwide, Inc.                      
Debt Instrument [Line Items]                      
Equity interest acquired   100.00%           100.00%      
Purchase price, net of cash acquired   $ 77,000,000                  
Payments to acquire business   $ 77,300,000                  
Certified Thermoplastics Co., LLC                      
Debt Instrument [Line Items]                      
Equity interest acquired       100.00%             100.00%
Purchase price, net of cash acquired       $ 30,700,000              
Payments to acquire business       $ 30,800,000              
Lightning Diversion Systems, Inc.                      
Debt Instrument [Line Items]                      
Equity interest acquired           100.00%          
Purchase price, net of cash acquired           $ 60,000,000          
Payments to acquire business         $ 600,000 $ 61,400,000          
Revolving Credit Facility | Minimum                      
Debt Instrument [Line Items]                      
Commitment fee (percent)     0.20%                
Revolving Credit Facility | Maximum                      
Debt Instrument [Line Items]                      
Commitment fee (percent)     0.30%                
Revolving Credit Facility | New Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity $ 100,000,000.0                    
Revolving Credit Facility | New Revolving Credit Facility | Minimum                      
Debt Instrument [Line Items]                      
Commitment fee (percent) 0.175%                    
Revolving Credit Facility | New Revolving Credit Facility | Maximum                      
Debt Instrument [Line Items]                      
Commitment fee (percent) 0.275%                    
Revolving Credit Facility | New Revolving Credit Facility | LIBOR Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 1.50%                    
Revolving Credit Facility | New Revolving Credit Facility | LIBOR Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 2.50%                    
Revolving Credit Facility | New Revolving Credit Facility | Federal Funds Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent) 0.50%                    
Revolving Credit Facility | New Revolving Credit Facility | Eurodollar Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent) 1.00%                    
Revolving Credit Facility | New Revolving Credit Facility | Base Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 0.50%                    
Revolving Credit Facility | New Revolving Credit Facility | Base Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 1.50%                    
Revolving Credit Facility | 2018 Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity                 $ 100,000,000.0    
Percentage of excess cash flow payment when leverage ratio is greater than 3.25     50.00%                
Percentage of excess cash flow payment when leverage ratio is less than or equal to 3.25     25.00%                
Percentage of excess cash flow payment when leverage ratio is less than or equal to 2.50     0.00%                
Proceeds from lines of credit     $ 7,900,000                
Repayments of lines of credit $ 58,500,000                    
Fees paid to lenders to be capitalized               $ 500,000      
Amortization of debt issuance costs               500,000      
Debt issuance costs, net               1,100,000      
Revolving Credit Facility | 2018 Revolving Credit Facility | LIBOR Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     1.75%                
Revolving Credit Facility | 2018 Revolving Credit Facility | LIBOR Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     2.75%                
Revolving Credit Facility | 2018 Revolving Credit Facility | Federal Funds Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent)     0.50%                
Revolving Credit Facility | 2018 Revolving Credit Facility | Eurodollar Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent)     1.00%                
Revolving Credit Facility | 2018 Revolving Credit Facility | Base Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     0.75%                
Revolving Credit Facility | 2018 Revolving Credit Facility | Base Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     1.75%                
Revolving Credit Facility | 2018 Term Loan                      
Debt Instrument [Line Items]                      
Fees paid to lenders to be capitalized               1,500,000      
Revolving Credit Facility | New Existing Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Repayments of lines of credit     $ 247,900,000                
Revolving Credit Facility | New Credit Facilities                      
Debt Instrument [Line Items]                      
Remaining borrowing capacity               99,800,000      
Outstanding standby letters of credit               200,000      
Secured Debt | New Term Loan                      
Debt Instrument [Line Items]                      
Face amount of instrument $ 140,000,000.0                    
Prepayment percentage of principal 1.25%                    
Proceeds from lines of credit $ 140,000,000                    
Fees paid to lenders to be capitalized               $ 600,000      
Secured Debt | New Term Loan | LIBOR Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 1.50%                    
Secured Debt | New Term Loan | LIBOR Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 2.50%                    
Secured Debt | New Term Loan | Federal Funds Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent) 0.50%                    
Secured Debt | New Term Loan | Eurodollar Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent) 1.00%                    
Secured Debt | New Term Loan | Base Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 0.50%                    
Secured Debt | New Term Loan | Base Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent) 1.50%                    
Secured Debt | 2018 Term Loan                      
Debt Instrument [Line Items]                      
Face amount of instrument     $ 240,000,000.0                
Prepayment percentage of principal     0.25%                
Proceeds from lines of credit     $ 240,000,000                
Repayments of debt $ 56,000,000                    
Secured Debt | 2018 Term Loan | LIBOR Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     3.75%                
Secured Debt | 2018 Term Loan | LIBOR Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     4.00%                
Secured Debt | 2018 Term Loan | Federal Funds Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent)     0.50%                
Secured Debt | 2018 Term Loan | Eurodollar Rate                      
Debt Instrument [Line Items]                      
Fixed rate spread (percent)     1.00%                
Secured Debt | 2018 Term Loan | Base Rate | Minimum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     3.75%                
Secured Debt | 2018 Term Loan | Base Rate | Maximum                      
Debt Instrument [Line Items]                      
Variable rate spread (percent)     4.00%