XML 86 R81.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock-Based Compensation - (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
May 08, 2017
May 15, 2014
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Oct. 26, 2011
Stock-Based Compensation (Textual) [Abstract]            
Common Stock (in shares) 6,510,000 6,510,000       4,160,000
Number of additional shares reserved for issuance (in shares) 2,350,000 2,350,000        
Stock-based compensation cost     $ 6,707 $ 6,412 $ 6,909  
Unrecognized compensation expense     $ 7,902      
Expected period of unrecognized compensation expense     3 years 1 month 6 days      
Outstanding stock options (in shares)       0    
Options outstanding (in dollars per share)       $ 0.00    
Restricted stock units            
Stock-Based Compensation (Textual) [Abstract]            
Conversion of common stock upon vesting (in shares)     1      
Service period for awards     3 years      
Restricted stock units | Board of Directors            
Stock-Based Compensation (Textual) [Abstract]            
Service period for awards     1 year      
Restricted stock units | Certain executive management | Minimum            
Stock-Based Compensation (Textual) [Abstract]            
Service period for awards     3 years      
Restricted stock units | Certain executive management | Maximum            
Stock-Based Compensation (Textual) [Abstract]            
Service period for awards     4 years      
Performance Restricted Stock Units            
Stock-Based Compensation (Textual) [Abstract]            
Conversion of common stock upon vesting (in shares)     1      
Service period for awards     2 years      
Stock appreciation rights            
Stock-Based Compensation (Textual) [Abstract]            
Percentage of SARs vesting annually     25.00%      
Grant expiration period     10 years