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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock-Based Compensation      
Share-based compensation, remaining shares available for issuance (in shares) 4,238,315    
Stock-based compensation expense (in dollars)   $ 6.0  
Director      
Stock-Based Compensation      
Stock-based compensation expense (in dollars) $ 1.0 $ 1.0 $ 1.0
Number of share options granted during the period (in shares) 59,280 77,608 673
Engineering Selling and Administrative Expenses      
Stock-Based Compensation      
Stock-based compensation expense (in dollars) $ 7.1 $ 8.5 $ 9.5
Restricted Stock | Restructuring Charges      
Stock-Based Compensation      
Stock-based compensation expense (in dollars)   2.5  
Stock Options      
Stock-Based Compensation      
Stock-based compensation expense (in dollars) $ 0.6 $ 1.3 $ 2.7
Number of share options granted during the period (in shares) 0 250,432 210,243
Weighted average grant date fair value, options (in dollars per share)   $ 5.35 $ 8.07
Unrecognized compensation expense before income tax (in dollars) $ 0.2    
Recognition period for unrecognized compensation expense (in years) 1 year    
Stock Options | Employees      
Stock-Based Compensation      
Vesting period (in years) 3 years    
Expiration period (in years) 10 years    
Number of share options granted during the period (in shares) 0    
Restricted Stock Units      
Stock-Based Compensation      
Stock-based compensation expense (in dollars) $ 3.7 $ 3.5 $ 2.4
Unrecognized compensation expense before income tax (in dollars) $ 4.8    
Recognition period for unrecognized compensation expense (in years) 2 years    
Number of shares of other than options granted during the period (in shares) 358,255 333,269 178,371
Restricted Stock Units | Employees      
Stock-Based Compensation      
Vesting period (in years) 3 years    
Options vesting percentage 100.00%    
Vesting rights, annual increments beginning on the grant date 100% on the third anniversary of the grant date    
Anniversary period from grant date, for grants made prior to 2019 (in years) 3 years    
Performance Shares      
Stock-Based Compensation      
Stock-based compensation expense (in dollars) $ 1.9 $ 0.2 $ 3.4
Unrecognized compensation expense before income tax (in dollars) $ 3.0    
Recognition period for unrecognized compensation expense (in years) 2 years    
Number of shares of other than options granted during the period (in shares) 159,247 328,310 228,037
Performance period (in years) 3 years    
Period of U.S. Treasury rates as a basis for assumed risk-free rates (in years) 3 years    
2013 Omnibus Plan      
Stock-Based Compensation      
Share-based compensation, shares authorized (in shares) 7,477,395    
Performance Shares 2021 | Performance Shares      
Stock-Based Compensation      
Performance period (in years) 3 years    
Percentage of shares paid based on total shareholder return relative to peer group (as a percent) 60.00%    
Percentage of shares paid based on adjusted EBITDA (as a percent) 40.00%    
Increase decrease in percentage of shares paid based on total shareholder return relative to defined peer group 20.00%    
Performance Shares 2020 | Performance Shares      
Stock-Based Compensation      
Performance period (in years)   3 years  
Percentage of shares paid based on total shareholder return relative to peer group (as a percent) 200.00%    
Increase decrease in percentage of shares paid based on total shareholder return relative to defined peer group   20.00%  
Percentage of shares of other than options granted during the period   200.00%  
Performance Shares 2020 | Performance Shares | Minimum      
Stock-Based Compensation      
Number of shares of other than options granted during the period (in shares)   0  
Performance Shares 2019 | Performance Shares      
Stock-Based Compensation      
Performance period (in years) 3 years    
Percentage of shares paid based on total shareholder return relative to peer group (as a percent) 50.00%    
Percentage of shares paid based on adjusted EBITDA (as a percent) 50.00%    
Performance Shares 2019 | Performance Shares | Minimum      
Stock-Based Compensation      
Number of shares of other than options granted during the period (in shares) 0