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Stock Options - Schedule of Options Outstanding (Details) - $ / shares
6 Months Ended
Aug. 27, 2015
Jun. 30, 2020
Jun. 30, 2019
Shares      
Outstanding, beginning of year (in shares)   625,800 395,550
Granted (in shares) 58,125 238,500 240,000
Exercised (in shares)   0 0
Forfeited (in shares) (22,875) 0 0
Expired (in shares)   0 0
Outstanding, end of period (in shares) 35,250 864,300 635,550
Exercisable, end of period (in shares)   62,625 0
Weighted Average Exercise Price      
Outstanding, weighted average exercise price (in dollars per share)   $ 29.29 $ 30.08
Granted (in dollars per share) $ 28.02 25.34 28.01
Exercised (in dollars per share)   0 0
Forfeited (in dollars per share)   0 0
Expired (in dollars per share)   0 0
Outstanding, weighted average exercise price (in dollars per share)   28.20 29.30
Exercisable, end of period (in dollars per share)   $ 29.47 $ 0