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Consolidated Balance Sheets (Parenthetical) - $ / shares | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Class A |  |
Common Stock, par value | $ 0.01 | $ 0.01
Common Stock, shares authorized | 12,000,000 | 12,000,000
Common Stock, shares issued | 6,577,100 | 6,577,100
Common Stock, shares outstanding | 6,577,100 | 6,577,100
Class B |  |
Common Stock, par value | $ 0.01 | $ 0.01
Common Stock, shares authorized | 150,000,000 | 150,000,000
Common Stock, shares issued | 77,805,530 | 79,449,349
Common Stock, shares outstanding | 77,805,530 | 79,449,349
Class C |  |
Common Stock, par value | $ 0.01 | $ 0.01
Common Stock, shares authorized | 1,200,000 | 1,200,000
Common Stock, shares issued | 661,688 | 661,688
Common Stock, shares outstanding | 661,688 | 661,688
Class D |  |
Common Stock, par value | $ 0.01 | $ 0.01
Common Stock, shares authorized | 5,000,000 | 5,000,000
Common Stock, shares issued | 18,251 | 18,491
Common Stock, shares outstanding | 18,251 | 18,491

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