XML 108 R90.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2015
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Stock-Based Compensation        
Stockholders' equity stock split, conversion ratio   0.25    
Period of U.S. Treasury rates as a basis for assumed risk-free rates (in years)   10 years    
2013 Omnibus Plan        
Stock-Based Compensation        
Share-based compensation, shares authorized (in shares) | shares   7,477,395    
Stockholders' equity stock split, conversion ratio   0.25    
Stock Options        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)   $ 1.9 $ 1.8 $ 3.7
Number of share options granted during the period (in shares) | shares   273,800 439,741 151,827
Unrecognized compensation expense (in dollars)   $ 2.7    
Recognition period for unrecognized compensation expense (in years)   2 years 1 month 6 days    
Weighted average grant date fair value, options (in dollars per share) | $ / shares   $ 12.16 $ 8.20 $ 43.72
Total intrinsic value of stock options exercised   $ 3.0 $ 6.3 $ 5.6
Stock Options | Officers and Employees        
Stock-Based Compensation        
Vesting rights, annual increments beginning on the grant date   25% increments beginning on the first anniversary of the grant date    
Vesting period (in years)   4 years    
Expiration period for grants made prior to 2011 (in years)   ten years    
Anniversary period from grant date, for grants made prior to 2011 (in years)   2 years    
Vesting rights percentage for grants made prior to 2011 (as a percent)   25.00%    
Stock Options | Officers and Employees | Options Granted in 2017        
Stock-Based Compensation        
Vesting period (in years)   3 years    
Expiration period (in years)   10 years    
Stock Options | Directors        
Stock-Based Compensation        
Vesting period (in years)   3 years 4 years  
Expiration period (in years)   10 years    
Anniversary period from grant date, for grants made prior to 2011 (in years)   1 year    
Vesting rights percentage for grants made prior to 2011 (as a percent)   25.00%    
Stock Options | Stock Plan 2003 | Officers and Employees        
Stock-Based Compensation        
Vesting rights, annual increments beginning on the grant date   25% increments beginning on the second anniversary of the grant date    
Vesting period (in years)   4 years    
Expiration period (in years)   10 years    
Anniversary period from grant date (in years)   2 years    
Stock Options | Stock Plan 2003 | Officers and Employees | Tranche One        
Stock-Based Compensation        
Options vesting percentage   25.00%    
Stock Options | Director Stock Plan 2004 | Directors        
Stock-Based Compensation        
Expiration period (in years)   10 years    
Restricted Stock        
Stock-Based Compensation        
Expiration period (in years)   3 years    
Stock-based compensation expense (in dollars)   $ 0.0 $ 1.8 0.3
Unrecognized compensation expense (in dollars)   $ 0.0    
Number of shares of other than options granted during the period (in shares) | shares 80,548 0    
Restricted Stock | Stock Plan 2003 | Officers and Employees        
Stock-Based Compensation        
Vesting rights, annual increments beginning on the grant date   100% on the third anniversary of the grant date    
Restricted Stock | Stock Plan 2003 | Officers and Employees | Tranche Two        
Stock-Based Compensation        
Options vesting percentage   100.00%    
Restricted Stock Units (RSUs)        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)   $ 4.4 $ 4.0 $ 7.5
Unrecognized compensation expense (in dollars)   $ 4.3    
Recognition period for unrecognized compensation expense (in years)   1 year 9 months 18 days    
Number of shares of other than options granted during the period (in shares) | shares   267,902 362,293 111,840
Performance Shares        
Stock-Based Compensation        
Number of shares of other than options granted during the period (in shares) | shares   267,902    
Performance Shares | Performance Shares 2016        
Stock-Based Compensation        
Performance period (in years)   3 years 3 years  
Percentage of shares paid based on total shareholder return relative to peer group of companies (as a percent)   50.00% 50.00%  
Percentage of shares paid based on return on investment (as a percent)   50.00% 50.00%  
Performance Shares | Performance Shares 2016 | Minimum        
Stock-Based Compensation        
Number of shares of other than options granted during the period (in shares) | shares   0 0  
Performance Shares | Performance Shares 2016 | Maximum        
Stock-Based Compensation        
Number of shares of other than options granted during the period (in shares) | shares   230,000 400,000  
Engineering Selling and Administrative Expenses        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)   $ 6.3 $ 4.9 $ 9.7
(Loss) Income from Discontinued Operations        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)   $ 0.0 0.3 $ 4.7
Other Expense | Restricted Stock        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)     2.8  
Restructuring Charges | Restricted Stock        
Stock-Based Compensation        
Stock-based compensation expense (in dollars)     $ 1.3