Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans - Narrative (Details)

v3.22.4
Stock-Based Compensation Plans - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2021
$ / shares
shares
Dec. 31, 2022
USD ($)
tranche
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
May 31, 2014
shares
Employee          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded (in shares) | shares 21,871        
Granted (in dollars per share) | $ / shares $ 43.30        
Employee Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized (in shares) | shares   500,000      
Employee discount (as a percent)   15.00%      
Employee purchase price (as a percent)   12.00%      
Stock-based compensation expense   $ 123      
Stock-settled bonus awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)   3 years      
Number of tranches | tranche   3      
Vested paid in full (as a percent)   100.00%      
Stock sale restriction (in years)   2 years      
Cost not yet recognized, amount   $ 900      
Fair value of awards   $ 900 $ 900 $ 1,200  
Weighted average amortization period of compensation not yet recognized (in years)   1 year 4 months 24 days      
Stock-settled bonus awards | Share-based Payment Arrangement, Tranche One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   33.33%      
Stock-settled bonus awards | Share-based Payment Arrangement, Tranche Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   33.33%      
Employee Vesting Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)   3 years      
Employee Vesting Stock Awards | Share-based Payment Arrangement, Tranche One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   33.33%      
Employee Vesting Stock Awards | Share-based Payment Arrangement, Tranche Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   33.33%      
Employee Vesting Stock Awards | Share-based Payment Arrangement, Tranche Three          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   33.33%      
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)   1 year 10 months 24 days      
Stock-based compensation expense   $ 2,000      
Granted (in dollars per share) | $ / shares   $ 43.01 $ 41.90 $ 33.68  
Fair value of shares vested   $ 1,700 $ 1,700 $ 1,600  
Performance share awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)   3 years      
Vested paid in full (as a percent)   100.00%      
Granted (in dollars per share) | $ / shares   $ 43.30      
Compensation expense not yet recognized   $ 1,200      
Weighted average amortization period of compensation not yet recognized (in years)   1 year 6 months      
Weighted average fair value of vesting stock awards that vested   $ 500      
Performance share awards | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   0.00%      
Performance share awards | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage (as a percent)   100.00%      
Restricted Stock Plan 2006          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized (in shares) | shares   1,500,000     500,000
Shares available for issuance (in shares) | shares   598,637