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Stock Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] | The Company made the following awards of time vested restricted stock:
Date |  | Shares Granted |  | Plan |  | Grant Date Fair Value Per Share |  | Vesting Period
2/18/2021 |  | 49,550 |  |  | 2005 Employee Stock Plan |  | $ | 81.84 |  |  | Ratably over 5 years from grant date
5/25/2021 |  | 7,680 |  |  | 2018 Non-Employee Director Stock Plan |  | $ | 78.18 |  |  | Shares vested immediately

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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