Quarterly report pursuant to Section 13 or 15(d)

Capital Transactions - Narrative (Details)

v3.22.1
Capital Transactions - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
May 05, 2021
Apr. 05, 2021
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2015
Mar. 08, 2022
Dec. 31, 2021
Mar. 10, 2021
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Common stock, dividends (in dollars per share)   $ 1.00              
Dividends, common stock, cash   $ 19,900,000   $ 19,858,000          
Stock repurchase program, authorized amount           $ 30,000,000   $ 15,000,000  
Repurchase of common stock (in shares)     451,000 0          
Repurchase of common stock     $ 7,971,000            
Stock repurchase program, remaining authorized repurchase amount     29,600,000            
2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized under the plan (in shares)                 1,500,000
Additional number of shares authorized under the plan (in shares) 2,000,000       1,500,000        
Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense     0 $ 0          
Unrecognized share-based compensation expense     $ 0       $ 0    
Options outstanding (in shares)     143,000       172,000    
Aggregate intrinsic value, outstanding     $ 600,000       $ 1,100,000    
Exercised (in shares)     29,000 2,500          
Exercised (in dollars per share)     $ 9.17 $ 11.98          
Aggregate intrinsic values of options exercised     $ 300,000 $ 19,000          
Tax benefit from the exercise of stock options     $ 100,000 9,000          
Weighted-average grant date fair value (in dollars per share)     $ 0            
Time-based stock options | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period     48 months            
Performance based stock options operating income margins                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Operating income margin, one (as a percent)     6.00%            
Operating income margin, two (as a percent)     8.00%            
Operating income margin, three (as a percent)     10.00%            
Unvested stock options outstanding (in shares)     0       0    
Performance based stock options operating income margins | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award performance period     1 year            
Performance based stock options operating income margins | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award performance period     1 year 3 months            
RSUs                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense     $ 500,000 $ 400,000          
Unrecognized share-based compensation expense     $ 1,000,000       $ 1,600,000    
Discount for lack of marketability     12.90%            
RSU issued (in shares)     0            
Weighted-average period over which the remaining compensation cost is expected to be recognized     6 months            
Minimum withholding requirements (in shares)     60,000 75,000          
RSUs | 2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Granted (in shares)     2,000            
RSUs | Minimum | 2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period     12 months            
RSUs | Maximum | 2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period     36 months            
RSUs | Director | 2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Restriction period for issuance of shares     2 years            
Nonvested subject to restriction period (in shares)     95,000       88,000    
Time-Based Restricted Stock Units (RSUs) | 2012 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Weighted-average grant date fair value (in dollars per share)     $ 16.35            
Performance-Based Restricted Stock Units (RSUs)                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based compensation expense     $ 300,000 $ 400,000          
Performance-Based Restricted Stock Units (RSUs) | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share based compensation potential compensation expense to be recognized     $ 2,000,000