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Earnings Per Share and Equity Transactions - Reconciliation of Amounts Used in Calculating Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net Income (Loss) Attributable to Parent [Abstract]      
Net (loss) income from continuing operations $ (5,360) $ (10,174) $ 63,899
Earnings allocated to unvested restricted shares 0 0 (29)
Net (loss) income from continuing operations attributable to common shareholders (5,360) (10,174) 63,870
Net loss from discontinued operations attributable to common shareholders $ 0 $ 0 $ (25,500)
Denominator:      
Weighted-average common shares outstanding, basic (in shares) 71,072,933 72,040,623 72,914,406
Effect of unvested restricted shares (in shares) 0 0 76,384
Weighted-average common shares outstanding, diluted (in shares) 71,072,933 72,040,623 72,990,790
Basic and diluted earnings per common share:      
Net (loss) income per common share, from continuing operations, basic (in dollars per share) $ (0.08) $ (0.14) $ 0.88
Net (loss) income per common share, from continuing operations, diluted (in dollars per share) (0.08) (0.14) 0.88
Net loss per common share, from discontinued operations, basic (in dollars per share) 0 0 (0.35)
Net loss per common share, from discontinued operations, diluted (in dollars per share) 0 0 (0.35)
Net (loss) income per common share, basic (in dollars per share) (0.08) (0.14) 0.53
Net (loss) income per common share, diluted (in dollars per share) $ (0.08) $ (0.14) $ 0.53