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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent events On May 1, 2020, the Company announced a quarterly dividend in the amount of $0.12 per share, payable on May 29, 2020 to holders of Class A Stock and Class B Stock of record on May 15, 2020. On January 30, 2020, the spread of COVID-19 was declared a Public Health Emergency of International Concern by the WHO. Subsequently, on March 11, 2020, the WHO characterized the COVID-19 outbreak as a pandemic. We will continue to monitor the impact of COVID-19, but at the date of this report it is too early to determine the full impact this virus may have on the global financial markets and the overall economy. Should this emerging macro-economic risk continue for an extended period, there could be an adverse material financial impact to our businesses and investments, including a material reduction in our results of operations.