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Stock-Based Compensation Non-Vested Common Stock Grants (Details) - Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award        
Granted shares 292,960 386,101 134,231  
Granted (fair value $ 6.01 $ 9.33 $ 16.24  
Less: Forfeited shares 122,460 232,323 6,059  
Less: Forfeited (fair value) $ 8.87 $ 12.61 $ 20.15  
Less: Vested shares 92,910 109,267 131,613  
Less: Vested (fair value) $ 9.99 $ 16.63 $ 19.22  
Outstanding shares 336,596 259,006 214,495 217,936
Outstanding (fair value) $ 6.99 $ 10.06 $ 17.49 $ 18.96