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Earnings Per Share and Dividends - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 03, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dividends Payable [Line Items]              
Dividends to Class A common stockholders   $ 4,345 $ 4,326 $ 3,987 $ 3,986    
Common Class A              
Dividends Payable [Line Items]              
Cash dividends declared per share of Class A common stock   $ 0.23   $ 0.22   $ 0.46 $ 0.44
Quarterly dividend              
Dividends Payable [Line Items]              
Dividend to Non-controlling unitholders   $ 2,889 $ 2,889 $ 2,763 $ 2,763 $ 5,778 $ 5,526
Quarterly dividend | Common Class A              
Dividends Payable [Line Items]              
Cash dividends declared per share of Class A common stock   $ 0.23 $ 0.23 $ 0.22 $ 0.22 $ 0.46 $ 0.44
Dividends to Class A common stockholders   $ 4,345 $ 4,326 $ 3,987 $ 3,986 $ 8,671 $ 7,973
Quarterly dividend | Common Class A | Subsequent Event              
Dividends Payable [Line Items]              
Cash dividends declared per share of Class A common stock $ 0.23