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Stock Repurchase Program (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Feb. 28, 2019
Dec. 31, 2019
Dec. 31, 2018
May 31, 2019
Feb. 13, 2019
Mar. 31, 2018
March 2018 Plan            
Class of Stock            
Stock repurchased program authorized number of shares (in shares)           500,000
Stock repurchased during period (in shares)     500,000      
Aggregate purchase price of shares repurchased     $ 5.3      
February 2019 Plan            
Class of Stock            
Stock repurchased program authorized number of shares (in shares)         100,000  
Stock repurchased during period (in shares) 100,000          
Aggregate purchase price of shares repurchased $ 1.6          
Repurchase May 2019 Plan            
Class of Stock            
Stock repurchased program authorized number of shares (in shares)       1,000,000    
Aggregate purchase price of shares repurchased   $ 7.2        
Stock repurchased during period (in shares)   436,369        
November 2019 Plan            
Class of Stock            
Stock repurchased during period (in shares) 200,000          
Aggregate purchase price of shares repurchased $ 2.0