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Quarterly Consolidated Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |
Revenue | $ 61,487 | $ 70,613 | $ 74,983 | $ 81,609 | $ 89,228 | $ 120,366 | $ 95,797 | $ 103,769 | $ 288,692 | $ 409,160
Net income attributable to common shareholders | $ (3,734) | $ 2,144 | $ 4,540 | $ 3,455 | $ 4,156 | $ 23,232 | $ 16,144 | $ 20,056 | $ 6,405 | $ 63,588
Basic earnings per common share (in dollars per share) | $ (0.62) | $ 0.36 | $ 0.75 | $ 0.59 | $ 0.71 | $ 3.97 | $ 2.75 | $ 3.47 | $ 1.07 | $ 10.90
Diluted earnings common share (in dollars per share) | $ (0.62) | $ 0.35 | $ 0.74 | $ 0.56 | $ 0.68 | $ 3.81 | $ 2.66 | $ 3.35 | $ 1.05 | $ 10.50
Basic weighted average common shares outstanding (in shares) | 5,988 | 5,985 | 6,016 | 5,860 | 5,850 | 5,847 | 5,866 | 5,779 | 5,963 | 5,836
Diluted weighted average common shares outstanding (in shares) | 5,988 | 6,084 | 6,103 | 6,124 | 6,099 | 6,094 | 6,061 | 5,978 | 6,128 | 6,058

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