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Stock-Based Compensation Plan - Restricted Stock Unit Award Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 12, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Restricted stock unit awards        
Weighted Average Grant Date Fair Value per Share        
Aggregate grant date fair value awards issues $ 1.0      
The 2018 LTIP | Restricted stock unit awards        
Number of Shares        
Beginning balance (in shares)   38,265 27,490 18,782
Granted (in shares)   26,796 26,369 20,346
Vested (in shares)   (21,814) (14,244) (9,578)
Forfeited (in shares)   (3,521) (1,350) (2,060)
Ending balance (in shares)   70,244 38,265 27,490
Weighted Average Grant Date Fair Value per Share        
Beginning balance (in dollars per share)   $ 28.78 $ 28.64 $ 37.05
Granted (in dollars per share)   31.83 29.70 24.85
Vested (in dollars per share)   29.22 30.20 36.36
Forfeited (in dollars per share)   30.33 28.92 30.07
Ending balance (in dollars per share)   $ 31.89 $ 28.78 $ 28.64
Aggregate grant date fair value awards issues   $ 0.9 $ 0.8 $ 0.5
The 2018 LTIP | Restricted stock unit awards | Minimum        
Weighted Average Grant Date Fair Value per Share        
Granted (in dollars per share)   $ 31.80 $ 29.70 $ 24.77
The 2018 LTIP | Restricted stock unit awards | Maximum        
Weighted Average Grant Date Fair Value per Share        
Granted (in dollars per share)   $ 37.42 $ 30.00 $ 26.23
The 2018 LTIP | Performance share unit awards        
Number of Shares        
Beginning balance (in shares)   21,492 16,241 2,787
Granted (in shares)   13,458 12,205 10,781
Performance factor increase (decrease) (in shares)   159 (4,493) 3,981
Vested (in shares)   (3,125) (2,461) (713)
Forfeited (in shares)   (1,297) 0 (595)
Ending balance (in shares)   30,687 21,492 16,241
Weighted Average Grant Date Fair Value per Share        
Beginning balance (in dollars per share)   $ 26.64 $ 27.67 $ 43.00
Granted (in dollars per share)   31.80 29.70 24.92
Performance factor decrease (in dollars per share)   31.80 29.70 24.92
Vested (in dollars per share)   28.22 43.00 28.55
Forfeited (in dollars per share)   30.87 0 30.22
Ending balance (in dollars per share)   $ 28.59 $ 26.64 $ 27.67
Aggregate grant date fair value awards issues   $ 0.4 $ 0.4 $ 0.3
Performance factor   100.00% 100.00% 138.50%
The 2018 LTIP | Performance share unit awards | Plan        
Weighted Average Grant Date Fair Value per Share        
Performance factor   101.40% 0.631% 100.00%
The 2018 LTIP | Performance share unit awards | Minimum        
Weighted Average Grant Date Fair Value per Share        
Granted (in dollars per share)       $ 24.77
The 2018 LTIP | Performance share unit awards | Maximum        
Weighted Average Grant Date Fair Value per Share        
Granted (in dollars per share)       $ 26.23
Inducement Awards | Restricted stock unit awards        
Number of Shares        
Granted (in shares)   30,518    
Weighted Average Grant Date Fair Value per Share        
Granted (in dollars per share)   $ 33.75