Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Narratives (Details)

v3.20.4
Stock-Based Compensation - Narratives (Details) - USD ($)
12 Months Ended 17 Months Ended
Dec. 14, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2017
Apr. 30, 2020
Oct. 03, 2017
May 04, 2016
Share-based Compensation Arrangement by Share-based Payment Award                
Dividends paid on common stock (in dollars per share) $ 1.80 $ 1.80            
Additional stock compensation expense   $ 2,144,000            
Proceeds from stock options exercised   373,000 $ 3,975,000 $ 131,000        
Stock compensation expense   21,527,000 16,212,000 18,419,000        
Stock compensation expense, tax benefit   $ 5,664,000 3,543,000 4,671,000        
Discontinued Operations                
Share-based Compensation Arrangement by Share-based Payment Award                
Dividends paid on common stock (in dollars per share)   $ 1.80            
Additional stock compensation expense   $ 654,000            
Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award                
Expiration period   10 years            
Intrinsic value of stock options exercised   $ 3,615,000            
Proceeds from stock options exercised   3,975,000            
Restricted Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Unrecognized stock-based compensation expense, other than options   $ 20,511,000            
Unrecognized stock-based compensation expense, period for recognition   1 year 7 months 2 days            
Fair value of awards vested   $ 11,269,000 8,493,000 13,628,000        
Performance Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Award requisite service period   3 years            
Unrecognized stock-based compensation expense, other than options   $ 10,982,000            
Unrecognized stock-based compensation expense, period for recognition   1 year 7 months 17 days            
Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award                
Stock compensation expense   $ 0            
Restricted Stock Awards                
Share-based Compensation Arrangement by Share-based Payment Award                
Fair value of awards vested   $ 510,000 $ 1,543,000 $ 3,493,000        
Board of Directors | Restricted Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Award vesting period   1 year            
Employee | Restricted Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Award vesting period   3 years            
Exit event exceeding threshold | Performance Shares                
Share-based Compensation Arrangement by Share-based Payment Award                
Award vesting percentage   100.00%            
2016 Stock Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award                
Shares authorized (shares)               8,017,038
Share awards issued (shares)         7,644,518      
2017 Omnibus Incentive Plan                
Share-based Compensation Arrangement by Share-based Payment Award                
Shares reserved for issuance (shares)             7,344,000  
Number of shares available for grant (shares)   12,405,315       9,000,000 372,520  
Minimum | Performance Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Award vesting percentage   0.00%            
Maximum | Performance Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award                
Award vesting percentage   200.00%