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Equity - Options (Details) - Stock options - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Nonqualified stock option activity      
Outstanding, beginning of period 15,000 15,000 20,000
Granted (in shares)     0
Exercised (in shares)     (5,000)
Outstanding, end of period 15,000 15,000 15,000
Options exercisable (in shares) 15,000 15,000 15,000
Weighted Average Price      
Outstanding at the beginning of the year (in dollars per share) $ 38.43 $ 38.43 $ 34.99
Exercised (in dollars per share)     24.65
Outstanding at the end of the year (in dollars per share) 38.43 38.43 38.43
Exercisable at the end of the period (in dollars per share) $ 38.43 $ 38.43 $ 38.43
Other information      
Aggregate intrinsic value of exercisable options at the end of the year $ 0    
Weighted average remaining contractual life of options exercisable 1 year 2 months 12 days 2 years 2 months 12 days 3 years 2 months 12 days
Options Value     $ 123,000
Market Value     233,000
Compensation expense related to share-based award $ 0 $ 0 $ 0