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Stock-Based Compensation (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
tranch
stock_awards
$ / shares
shares
Mar. 31, 2021
USD ($)
stock_awards
shares
Dec. 31, 2021
$ / shares
shares
Stock-Based Compensation [Abstract]      
Number of types of stock-based awards granted (in types) | stock_awards 2 2  
Fair market value of awards | $ $ 12,000 $ 9,200  
Stock-based compensation expense | $ 2,392 2,092  
Tax benefit from compensation expense | $ 600 500  
Unrecognized compensation expense | $ $ 20,500    
Unrecognized compensation, period for recognition 2 years 2 months 12 days    
Performance Shares [Member]      
Stock-Based Compensation [Abstract]      
Stock-based compensation expense | $ $ 1,306 1,089  
Number of shares [Abstract]      
Outstanding, December 31, 2021 246,210    
Granted 66,180    
Performance condition adjustment (a) [1] 64,399    
Vested (58,935)    
Forfeited 0    
Outstanding, March 31, 2022 317,854   246,210
Weighted Average Grant Date Fair Value [Abstract]      
Outstanding, December 31, 2021 | $ / shares $ 39.50    
Granted | $ / shares 79.81    
Performance condition adjustment (a) | $ / shares [1] 52.45    
Vested | $ / shares 34.41    
Forfeited | $ / shares 0    
Outstanding, March 31, 2022 | $ / shares $ 51.46   $ 39.50
Restricted Stock Units (RSUs) [Member]      
Stock-Based Compensation [Abstract]      
Stock-based compensation expense | $ $ 1,086 $ 1,003  
Number of shares [Abstract]      
Outstanding, December 31, 2021 161,300    
Granted 81,523    
Performance condition adjustment (a) 0    
Vested (91,327)    
Forfeited 0    
Outstanding, March 31, 2022 151,496   161,300
Weighted Average Grant Date Fair Value [Abstract]      
Outstanding, December 31, 2021 | $ / shares $ 45.08    
Granted | $ / shares 79.81    
Performance condition adjustment (a) | $ / shares 0    
Vested | $ / shares 43.47    
Forfeited | $ / shares 0    
Outstanding, March 31, 2022 | $ / shares $ 64.74   $ 45.08
Officers and Other Employees and Nonemployment directors | Restricted Stock Units (RSUs) [Member]      
Number of shares [Abstract]      
Granted 81,523 96,622  
Nonemployee Directors [Member] | Restricted Stock Units (RSUs) [Member]      
Stock-Based Compensation [Abstract]      
Vesting period (in years) 1 year    
Officers and other employees [Member] | Performance Shares [Member]      
Number of shares [Abstract]      
Granted 66,180 73,265  
Officers and other employees [Member] | Restricted Stock Units (RSUs) [Member]      
Stock-Based Compensation [Abstract]      
Number of equal tranches for annual vesting (in tranches) | tranch 3    
Officer [Member] | Performance Shares [Member]      
Stock-Based Compensation [Abstract]      
Performance Shares that could be awarded, as a percentage of ROIC target amount, minimum 0.00%    
Performance Shares that could be awarded, as a percentage of ROIC target amount, maximum 200.00%    
Performance Shares Target Percentage Earned, Officers     200.00%
Vesting period (in years) 3 years    
Other employees [Member] | Performance Shares [Member]      
Stock-Based Compensation [Abstract]      
Performance Shares that could be awarded, as a percentage of EBITDA target amount, minimum 0.00%    
Performance Shares that could be awarded, as a percentage of EBITDA target amount, maximum 200.00%    
Performance Shares Target Percentage Earned, Other Employees     200.00%
Number of equal tranches for annual vesting (in tranches) | tranch 3    
[1] Represents additional PSUs granted during the three months ended March 31, 2022, related to the 2021 performance condition adjustment described above.